DETERMINING SHORT TO POWER SUPPLY LOCATION (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (MZR 1.5))]

• 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 CAN LINE BETWEEN CONNECTOR C-11 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Disconnect the negative battery cable. • Disconnect connector C-11. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at DLC-2 terminals L and K. • Is the voltage between 1.5—3.5 V?	Yes	Go to Step 14.
No	Go to the next step.
2	INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect connector C-43. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at DLC-2 terminals E and F. • Is the voltage between 1.5—3.5 V?	Yes	Go to the next step.
No	Go to Step 5.
3	INSPECT CAN LINE BETWEEN Bluetooth UNIT AND CONNECTOR C-43 FOR SHORT TO POWER SUPPLY • Switch the ignition ON. • Measure the voltage at Bluetooth unit terminals Y and Z. • Is the voltage between 1.5—3.5 V?	Yes	Repair or replace the wiring harness between the connector C-11 and connector C-43 because the wiring harness is shorted to the power supply.
No	Go to the next step.
4	INSPECT CAN LINE IN Bluetooth UNIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect the Bluetooth unit connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at Bluetooth unit terminals Y and Z (wiring harness side). • Is the voltage between 1.5—3.5 V?	Yes	Replace the Bluetooth unit because there is a short to the power supply in the Bluetooth unit. (See Bluetooth UNIT REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the Bluetooth unit and connector C-43 because the wiring harness is shorted to the power supply.
5	INSPECT CAN LINE BETWEEN CONNECTOR C-45 AND DLC-2 FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect connector C-45. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at DLC-2 terminals L and K. • Is the voltage between 1.5—3.5 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness between DLC-2 and connector C-45 because the wiring harness is shorted to the power supply.
6	INSPECT CAN LINE BETWEEN CLIMATE CONTROL UNIT AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY • Switch the ignition ON. • Measure the voltage at climate control unit terminals 2E and 2G. • Is the voltage between 1.5—3.5 V?	Yes	Go to Step 8.
No	Go to the next step.
7	INSPECT CAN LINE IN CLIMATE CONTROL UNIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect the climate control unit connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at climate control unit terminals 2E and 2G (wiring harness side). • Is the voltage between 1.5—3.5 V?	Yes	Replace the climate control unit because there is a short to the power supply in the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
No	Repair or replace the wiring harness between the climate control unit and connector C-45 because the wiring harness is shorted to the power supply.
8	INSPECT CAN LINE BETWEEN AUDIO UNIT AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY • Switch the ignition ON. • Measure the voltage at the audio unit terminals 1O and 1Q. • Is the voltage between 1.5—3.5 V?	Yes	Go to Step 10.
No	Go to the next step.
9	INSPECT CAN LINE IN AUDIO UNIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect the audio unit connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at audio unit terminals 1O and 1Q (wiring harness side). • Is the voltage between 1.5—3.5 V?	Yes	Replace the audio unit because there is a short to the power supply in the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the audio unit and connector C-45 because the wiring harness is shorted to the power supply.
10	INSPECT CAN LINE BETWEEN USB ADAPTER AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY • Switch the ignition ON. • Measure the voltage at the USB adapter terminals 1O and 1Q. • Is the voltage between 1.5—3.5 V?	Yes	Go to Step 12.
No	Go to the next step.
11	INSPECT CAN LINE IN USB ADAPTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect the USB adapter connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at USB adapter terminals 1L and 1K (wiring harness side). • Is the voltage between 1.5—3.5 V?	Yes	Replace the USB adapter because there is a short to the power supply in the USB adapter. (See USB ADAPTER REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the USB adapter and connector C-45 because the wiring harness is shorted to the power supply.
12	INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY • Switch the ignition ON. • Measure the voltage at instrument cluster terminals 2C and 2E. • Is the voltage between 1.5—3.5 V?	Yes	Repair or replace the wiring harness between connector C-43 and connector C-45 because the wiring harness is shorted to the power supply.
No	Go to the next step.
13	INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Disconnect the instrument cluster connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at instrument cluster terminals 2C and 2E (wiring harness side). • 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-45 because the wiring harness is shorted to the power supply.
14	INSPECT CAN LINE IN MULTI INFORMATION DISPLAY/INFORMATION DISPLAY FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the negative battery cable. • Connect connector C-11. • Disconnect the multi information display/ information display connector. • Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) • Switch the ignition ON. • Measure the voltage at DLC-2 terminals L and K. • Is the voltage between 1.5—3.5 V?	Yes	Replace the multi information display/information display because there is a short to the power supply in the multi information display/information display. (See MULTI INFORMATION DISPLAY REMOVAL/INSTALLATION.) (See INFORMATION DISPLAY REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between the multi information display/information display and connector C-11 because the wiring harness is shorted to the power supply.

Step

Inspection

Action

INSPECT CAN LINE BETWEEN CONNECTOR C-11 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Disconnect the negative battery cable.

• Disconnect connector C-11.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at DLC-2 terminals L and K.

• Is the voltage between 1.5—3.5 V?

Yes

Go to Step 14.

Go to the next step.

INSPECT CAN LINE BETWEEN CONNECTOR C-43 AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect connector C-43.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

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

• Is the voltage between 1.5—3.5 V?

Yes

Go to the next step.

Go to Step 5.

INSPECT CAN LINE BETWEEN Bluetooth UNIT AND CONNECTOR C-43 FOR SHORT TO POWER SUPPLY

• Switch the ignition ON.

• Measure the voltage at Bluetooth unit terminals Y and Z.

• Is the voltage between 1.5—3.5 V?

Yes

Repair or replace the wiring harness between the connector C-11 and connector C-43 because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT CAN LINE IN Bluetooth UNIT FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect the Bluetooth unit connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at Bluetooth unit terminals Y and Z (wiring harness side).

• Is the voltage between 1.5—3.5 V?

Yes

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

(See Bluetooth UNIT REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the Bluetooth unit and connector C-43 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CONNECTOR C-45 AND DLC-2 FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect connector C-45.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at DLC-2 terminals L and K.

• Is the voltage between 1.5—3.5 V?

Yes

Go to the next step.

Repair or replace the wiring harness between DLC-2 and connector C-45 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN CLIMATE CONTROL UNIT AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY

• Switch the ignition ON.

• Measure the voltage at climate control unit terminals 2E and 2G.

• Is the voltage between 1.5—3.5 V?

Yes

Go to Step 8.

Go to the next step.

INSPECT CAN LINE IN CLIMATE CONTROL UNIT FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect the climate control unit connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at climate control unit terminals 2E and 2G (wiring harness side).

• Is the voltage between 1.5—3.5 V?

Yes

Replace the climate control unit because there is a short to the power supply in the climate control unit.

(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

Repair or replace the wiring harness between the climate control unit and connector C-45 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN AUDIO UNIT AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY

• Switch the ignition ON.

• Measure the voltage at the audio unit terminals 1O and 1Q.

• Is the voltage between 1.5—3.5 V?

Yes

Go to Step 10.

Go to the next step.

INSPECT CAN LINE IN AUDIO UNIT FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect the audio unit connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at audio unit terminals 1O and 1Q (wiring harness side).

• Is the voltage between 1.5—3.5 V?

Yes

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

(See AUDIO UNIT REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the audio unit and connector C-45 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN USB ADAPTER AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY

• Switch the ignition ON.

• Measure the voltage at the USB adapter terminals 1O and 1Q.

• Is the voltage between 1.5—3.5 V?

Yes

Go to Step 12.

Go to the next step.

INSPECT CAN LINE IN USB ADAPTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect the USB adapter connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at USB adapter terminals 1L and 1K (wiring harness side).

• Is the voltage between 1.5—3.5 V?

Yes

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

(See USB ADAPTER REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the USB adapter and connector C-45 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE BETWEEN INSTRUMENT CLUSTER AND CONNECTOR C-45 FOR SHORT TO POWER SUPPLY

• Switch the ignition ON.

• Measure the voltage at instrument cluster terminals 2C and 2E.

• Is the voltage between 1.5—3.5 V?

Yes

Repair or replace the wiring harness between connector C-43 and connector C-45 because the wiring harness is shorted to the power supply.

Go to the next step.

INSPECT CAN LINE IN INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Disconnect the instrument cluster connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at instrument cluster terminals 2C and 2E (wiring harness side).

• 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-45 because the wiring harness is shorted to the power supply.

INSPECT CAN LINE IN MULTI INFORMATION DISPLAY/INFORMATION DISPLAY FOR SHORT TO POWER SUPPLY

• Switch the ignition off.

• Disconnect the negative battery cable.

• Connect connector C-11.

• Disconnect the multi information display/ information display connector.

• Connect the negative battery cable.

(See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)

• Switch the ignition ON.

• Measure the voltage at DLC-2 terminals L and K.

• Is the voltage between 1.5—3.5 V?

Yes

Replace the multi information display/information display because there is a short to the power supply in the multi information display/information display.

(See MULTI INFORMATION DISPLAY REMOVAL/INSTALLATION.)

(See INFORMATION DISPLAY REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between the multi information display/information display and connector C-11 because the wiring harness is shorted to the power supply.