DETERMINING SHORT TO POWER SUPPLY LOCATION (HS-CAN) [MZR 1.6 (L.H.D.)]

• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.

• When inspecting the DLC-2, touch it with a paper clip or similar thin pin without directly inserting a tester into the terminals.

• Disconnect the negative battery cable before performing any work that requires handling of connectors.

Step	Inspection	Action
1	INSPECT FOR SHORT TO POWER SUPPLY BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector 2 which has front body control module (FBCM) terminals 2K and 2I • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Go to Step 9.
2	INSPECT CAN LINE BETWEEN PCM AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY • Measure the voltage at PCM terminals 1BE and 1AZ. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the front body control module (FBCM) because there is a short to the power supply in the front body control module (FBCM). (See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)
No	Go to the next step.
3	INSPECT CAN LINE BETWEEN CONNECTOR C-32 AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-32. • Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-32 and the front body control module (FBCM) because the wiring harness is shorted to the power supply.
4	INSPECT CAN LINE BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE OR ADAPTIVE LED HEADLIGHTS CONTROL MODULE AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY • Measure the voltage at AFS control module / auto leveling control module or adaptive LED headlights control module terminals A and B. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 6.
No	Go to the next step.
5	INSPECT AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE OR ADAPTIVE LED HEADLIGHTS CONTROL MODULE FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the AFS control module / auto leveling control module or adaptive LED headlights control module connector. • Connect connector C-32. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the AFS control module / auto leveling control module or adaptive LED headlights control module because there is a short to the power supply in the AFS control module / auto leveling control module or adaptive LED headlights control module. (See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.) (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.) (See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the AFS control module / auto leveling control module or adaptive LED headlights control module and connector C-32 because the wiring harness is shorted to the power supply.
6	INSPECT CAN LINE BETWEEN CONNECTOR C-60 AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-60. • Connect connector C-32. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-60 and connector C-32 because the wiring harness is shorted to the power supply.
7	INSPECT CAN LINE BETWEEN DSC HU/CM OR ABS HU/CM AND CONNECTOR C-60 FOR SHORT TO POWER SUPPLY • Measure the voltage at DSC HU/CM terminals AF and AC (with DSC). • Measure the voltage at ABS HU/CM terminals H and L (without DSC). • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 31.
No	Go to the next step.
8	INSPECT DSC HU/CM OR ABS HU/CM FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the DSC HU/CM or ABS HU/CM connector. • Connect connector C-60. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the DSC HU/CM or ABS HU/CM because there is a short to the power supply in the DSC HU/CM or ABS HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.) (See ABS HU/CM REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between DSC HU/CM or ABS HU/CM and connector C-60 because the wiring harness is shorted to the power supply.
9	INSPECT CAN LINE BETWEEN CONNECTOR C-03 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-03. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Repair or replace the wiring harness between connector C-03 and front body control module (FBCM) because the wiring harness is shorted to the power supply.
No	Go to the next step.
10	INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-12. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Repair or replace the wiring harness between connector C-03 and connector C-12 because the wiring harness is shorted to the power supply.
No	Go to the next step.
11	INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-33. • Connect connector C-12. • Connect connector C-03. • Cnnect connector 2 which has front body control module (FBCM) terminals 2K and 2I • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at PCM terminals 1BE and 1AZ. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-12 and connector C-33 because the wiring harness is shorted to the power supply.
12	INSPECT CAN LINE BETWEEN CONNECTOR C-33 AND DLC-2 FOR SHORT TO POWER SUPPLY • Measure the voltage at DLC-2 terminals F and E. • Is the voltage 0 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-33 and DLC-2 because the wiring harness is shorted to the power supply.
13	INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY • Measure the voltage at EPS control module terminals 2B and 2D. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 15.
No	Go to the next step.
14	INSPECT EPS CONTROL MODULE FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Connect connector C-33. • Disconnect the EPS control module connector. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the EPS control module because there is a short to the power supply in the EPS control module. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the EPS control module and connector C-33 because the wiring harness is shorted to the power supply.
15	INSPECT CAN LINE BETWEEN START STOP UNIT AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY • Measure the voltage at start stop unit terminals 2M and 2O. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 17.
No	Go to the next step.
16	INSPECT START STOP UNIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the start stop unit connector. • Connect connector C-33. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the start stop unit because there is a short to the power supply in the start stop unit. (See START STOP UNIT REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the start stop unit and connector C-33 because the wiring harness is shorted to the power supply.
17	INSPECT JB No.2 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-34. • Connect connector C-33. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Replace the JB No.2 because there is a short to the power supply in the JB No.2.
18	INSPECT CAN LINE BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY • Measure the voltage at connectivity master unit (CMU) terminals 2E and 2F. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 20.
No	Go to the next step.
19	INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the connectivity master unit (CMU) connector. • Connect connector C-34. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the connectivity master unit (CMU) because there is a short to the power supply in the connectivity master unit (CMU). (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-34 because the wiring harness is shorted to the power supply.
20	INSPECT CAN LINE BETWEEN MAZDA ERA-GLONASS CONTROL MODULE AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY • Measure the voltage at MAZDA ERA-GLONASS control module terminals 1Q and 1S. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 23.
No	Go to the next step.
21	INSPECT CAN LINE BETWEEN MAZDA ERA-GLONASS CONTROL MODULE AND CONNECTOR C-62 FOR SHORT TO POWER SUPPLY • Switch the ignition off (LOCK). • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-62. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at MAZDA ERA-GLONASS control module terminals 1Q and 1S. • Is the voltage between 1.5 — 3.5 V?	Yes	Repair or replace the wiring harness between connector C-62 and connector C-34 because the wiring harness is shorted to the power supply.
No	Go to the next step.
22	INSPECT MAZDA ERA-GLONASS CONTROL MODULE FOR SHORT TO POWER SUPPLY • Switch the ignition off (LOCK). • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Connect connector C-34. • Connect connector C-62. • Disconnect the MAZDA ERA-GLONASS control module connector. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals E and F. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the MAZDA ERA-GLONASS control module because there is a short to the power supply in the MAZDA ERA-GLONASS control module. (See MAZDA ERA-GLONASS CONTROL MODULE REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the MAZDA ERA-GLONASS control module and connector C-62 because the wiring harness is shorted to the power supply.
23	INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY • Measure the voltage at instrument cluster terminals B and D. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Go to Step 25.
24	INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the SAS control module connector. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at SAS control module terminals 3B and 3C (wiring harness side). • Is the voltage 0 V?	Yes	Replace the SAS control module connector because there is a short to the power supply in the SAS control module connector. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between SAS control module and connector C-34 because the wiring harness is shorted to the power supply.
25	INSPECT CAN LINE BETWEEN CONNECTOR C-34 AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-09. • Connect connector C-34. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-34 and connector C-09 because the wiring harness is shorted to the power supply.
26	INSPECT CAN LINE BETWEEN CONNECTOR C-09 AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-40. • Connect connector C-09. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between connector C-09 and connector C-40 because the wiring harness is shorted to the power supply.
27	INSPECT CAN LINE BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY • Measure the voltage at audio amplifier terminals 2L and 2N. • Is the voltage between 1.5 — 3.5 V?	Yes	Go to Step 29.
No	Go to the next step.
28	INSPECT AUDIO AMPLIFIER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the audio amplifier connector. • Connect connector C-40. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the audio amplifier because there is a short to the power supply in the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the audio amplifier and connector C-40 because the wiring harness is shorted to the power supply.
29	INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect connector C-09. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at instrument cluster terminals B and D. • Is the voltage between 1.5 — 3.5 V?	Yes	Repair or replace the wiring harness between the connector C-40 and connector C-09 because the wiring harness is shorted to the power supply.
No	Go to the next step.
30	INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the instrument cluster connector. • Connect connector C-40. • Connect connector C-09. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the instrument cluster because there is a short to the power supply in the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the instrument cluster and connector C-09 because the wiring harness is shorted to the power supply.
31	INSPECT PCM FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the PCM connector. • Connect connector C-60. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off). • Measure the voltage at DLC-2 terminals F and E. • Is the voltage between 1.5 — 3.5 V?	Yes	Replace the PCM because there is a short to the power supply in the PCM. (See PCM REMOVAL/INSTALLATION [MZR 1.6].)
No	Repair or replace the wiring harness between the PCM and connector C-60 because the wiring harness is shorted to the power supply.

Step

Inspection

Action

INSPECT FOR SHORT TO POWER SUPPLY BETWEEN FRONT BODY CONTROL MODULE (FBCM) AND INSTRUMENT CLUSTER

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector 2 which has front body control module (FBCM) terminals 2K and 2I

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Go to Step 9.

INSPECT CAN LINE BETWEEN PCM AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY

• Measure the voltage at PCM terminals 1BE and 1AZ.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the front body control module (FBCM) because there is a short to the power supply in the front body control module (FBCM).

(See FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION.)

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-32 AND FRONT BODY CONTROL MODULE (FBCM) FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-32.

• Connect connector 2 which has front body control module (FBCM) terminals 2K and 2I

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-32 and the front body control module (FBCM) because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE OR ADAPTIVE LED HEADLIGHTS CONTROL MODULE AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY

• Measure the voltage at AFS control module / auto leveling control module or adaptive LED headlights control module terminals A and B.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 6.

Go to the next step.

INSPECT AFS CONTROL MODULE / AUTO LEVELING CONTROL MODULE OR ADAPTIVE LED HEADLIGHTS CONTROL MODULE FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the AFS control module / auto leveling control module or adaptive LED headlights control module connector.

• Connect connector C-32.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the AFS control module / auto leveling control module or adaptive LED headlights control module because there is a short to the power supply in the AFS control module / auto leveling control module or adaptive LED headlights control module.

(See ADAPTIVE LED HEADLIGHTS CONTROL MODULE REMOVAL/INSTALLATION.)

(See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION.)

(See AUTO LEVELING CONTROL MODULE REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the AFS control module / auto leveling control module or adaptive LED headlights control module and connector C-32 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-60 AND CONNECTOR C-32 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-60.

• Connect connector C-32.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-60 and connector C-32 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN DSC HU/CM OR ABS HU/CM AND CONNECTOR C-60 FOR SHORT TO POWER SUPPLY

• Measure the voltage at DSC HU/CM terminals AF and AC (with DSC).

• Measure the voltage at ABS HU/CM terminals H and L (without DSC).

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 31.

Go to the next step.

INSPECT DSC HU/CM OR ABS HU/CM FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the DSC HU/CM or ABS HU/CM connector.

• Connect connector C-60.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the DSC HU/CM or ABS HU/CM because there is a short to the power supply in the DSC HU/CM or ABS HU/CM.

(See DSC HU/CM REMOVAL/INSTALLATION.)

(See ABS HU/CM REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between DSC HU/CM or ABS HU/CM and connector C-60 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-03 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-03.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Repair or replace the wiring harness between connector C-03 and front body control module (FBCM) because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-12.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Repair or replace the wiring harness between connector C-03 and connector C-12 because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-12 AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-33.

• Connect connector C-12.

• Connect connector C-03.

• Cnnect connector 2 which has front body control module (FBCM) terminals 2K and 2I

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at PCM terminals 1BE and 1AZ.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-12 and connector C-33 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-33 AND DLC-2 FOR SHORT TO POWER SUPPLY

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage 0 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-33 and DLC-2 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY

• Measure the voltage at EPS control module terminals 2B and 2D.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 15.

Go to the next step.

INSPECT EPS CONTROL MODULE FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Connect connector C-33.

• Disconnect the EPS control module connector.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the EPS control module because there is a short to the power supply in the EPS control module.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the EPS control module and connector C-33 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN START STOP UNIT AND CONNECTOR C-33 FOR SHORT TO POWER SUPPLY

• Measure the voltage at start stop unit terminals 2M and 2O.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 17.

Go to the next step.

INSPECT START STOP UNIT FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the start stop unit connector.

• Connect connector C-33.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the start stop unit because there is a short to the power supply in the start stop unit.

(See START STOP UNIT REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the start stop unit and connector C-33 because the wiring harness is shorted to the power supply.

INSPECT JB No.2 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-34.

• Connect connector C-33.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Replace the JB No.2 because there is a short to the power supply in the JB No.2.

INSPECT CAN LINE BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY

• Measure the voltage at connectivity master unit (CMU) terminals 2E and 2F.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 20.

Go to the next step.

INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the connectivity master unit (CMU) connector.

• Connect connector C-34.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the connectivity master unit (CMU) because there is a short to the power supply in the connectivity master unit (CMU).

(See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-34 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN MAZDA ERA-GLONASS CONTROL MODULE AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY

• Measure the voltage at MAZDA ERA-GLONASS control module terminals 1Q and 1S.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 23.

Go to the next step.

INSPECT CAN LINE BETWEEN MAZDA ERA-GLONASS CONTROL MODULE AND CONNECTOR C-62 FOR SHORT TO POWER SUPPLY

• Switch the ignition off (LOCK).

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-62.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at MAZDA ERA-GLONASS control module terminals 1Q and 1S.

• Is the voltage between 1.5 — 3.5 V?

Yes

Repair or replace the wiring harness between connector C-62 and connector C-34 because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT MAZDA ERA-GLONASS CONTROL MODULE FOR SHORT TO POWER SUPPLY

• Switch the ignition off (LOCK).

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Connect connector C-34.

• Connect connector C-62.

• Disconnect the MAZDA ERA-GLONASS control module connector.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals E and F.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the MAZDA ERA-GLONASS control module because there is a short to the power supply in the MAZDA ERA-GLONASS control module.

(See MAZDA ERA-GLONASS CONTROL MODULE REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the MAZDA ERA-GLONASS control module and connector C-62 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-34 FOR SHORT TO POWER SUPPLY

• Measure the voltage at instrument cluster terminals B and D.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Go to Step 25.

INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the SAS control module connector.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at SAS control module terminals 3B and 3C (wiring harness side).

• Is the voltage 0 V?

Yes

Replace the SAS control module connector because there is a short to the power supply in the SAS control module connector.

(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between SAS control module and connector C-34 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-34 AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-09.

• Connect connector C-34.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-34 and connector C-09 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-09 AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-40.

• Connect connector C-09.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between connector C-09 and connector C-40 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY

• Measure the voltage at audio amplifier terminals 2L and 2N.

• Is the voltage between 1.5 — 3.5 V?

Yes

Go to Step 29.

Go to the next step.

INSPECT AUDIO AMPLIFIER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the audio amplifier connector.

• Connect connector C-40.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the audio amplifier because there is a short to the power supply in the audio amplifier.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the audio amplifier and connector C-40 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-09 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect connector C-09.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at instrument cluster terminals B and D.

• Is the voltage between 1.5 — 3.5 V?

Yes

Repair or replace the wiring harness between the connector C-40 and connector C-09 because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the instrument cluster connector.

• Connect connector C-40.

• Connect connector C-09.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the instrument cluster because there is a short to the power supply in the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the instrument cluster and connector C-09 because the wiring harness is shorted to the power supply.

INSPECT PCM FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Disconnect the PCM connector.

• Connect connector C-60.

• Connect the negative battery cable.

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

• Switch the ignition ON (engine off).

• Measure the voltage at DLC-2 terminals F and E.

• Is the voltage between 1.5 — 3.5 V?

Yes

Replace the PCM because there is a short to the power supply in the PCM.

(See PCM REMOVAL/INSTALLATION [MZR 1.6].)

Repair or replace the wiring harness between the PCM and connector C-60 because the wiring harness is shorted to the power supply.