MULTIPLEX COMMUNICATION SYSTEM [MULTIPLEX COMMUNICATION SYSTEM]

id0902e6830400

Outline

• If the controller area network (CAN) system is malfunctioning, read the DTCs of the following modules, using the M-MDS to determine the malfunctioning system.

― PCM

― TCM (FS5A-EL)

― EHPAS control module

― DSC HU/CM (with DSC)

― ABS HU/CM (with ABS)

― Fuel additive control module (MZ-CD 1.6 (Y6) High power-Euro 4 only)

― Keyless control module (with advanced keyless system)

― Instrument cluster

― Climate control unit

― SAS control module

― Audio unit (base module)

― Information display

― Water Heater unit

― PJB

Flowchart

• Use the following flowchart to verify the cause of the trouble.

STEP

INSPECTION

ACTION

1

INSPECT DTC INDICATION

•  Using the M-MDS, inspect if DTCs are displayed for the following module:

―  PCM

―  TCM

―  EHPAS control module

―  DSC HU/CM or ABS HU/CM

―  Fuel additive control module

―  Keyless control module

―  Instrument cluster

―  Climate control unit

―  SAS control module

―  Information display

―  Water Heater unit

―  PJB

•  Using the self-diagnostic function, inspect if DTCs are displayed for the following module:

―  Audio unit (base module)

―  Information display

•  Are any DTCs displayed?

Yes

Go to the next step.

No

Go to Step 5.

2

INSPECT CAN SYSTEM-RELATED DTC

•  Are any DTCs other than the following displayed?

―  U0001

―  U0073

―  U0100

―  U0101

―  U0118

―  U0121

―  U0131

―  U0140

―  U0151

―  U0155

―  U0164

―  U0181

―  U0184

―  U0214

―  U0323

―  U0516

―  U1900

―  U2012

―  U2023

―  U2202

―  U2516

―  U2523

―  16:Er12

―  17:Er11

Yes

Repair the malfunctioning part by following the related DTC inspection.

Go to the next step.

No

Go to the next step.

3

INSPECT CAN SYSTEM-RELATED DTC

•  Are any of the following DTCs displayed?

―  PCM (except MZ-CD 1.6 (Y6)): U0073, U0101, U0121, U0155

―  PCM (MZ-CD 1.6 (Y6)): U0001, U0118 (High power-Euro 4 only), U0121, U0155

―  TCM : U0073, U0100

―  EHPAS control module: U0073, U0100, U2023

―  DSC HU/CM or ABS HU/CM: U1900, U2012, U2523

―  Fuel additive control module: U1900, U2516

―  Keyless control module: U0073, U0100, U0323, U2023

―  Instrument cluster: U0073, U0100, U0101, U0121, U0131, U0140, U0151, U0184, U0214, U2516

―  Climate control unit: U0140, U0155, U0184, U0516

―  SAS control module: U0073, U1900

―  Audio unit (base module): 16:Er12, 17:Er11

―  Information display: U0164, U0181, U0184, U2516

―  Water heater unit: U1900, U2516

―  PJB: U1900

Yes

Repair the malfunctioning part by following the DTC inspection.

Go to the next step.

No

Troubleshooting completed.

4

VERIFY TROUBLESHOOTING COMPLETED

•  Clear the DTC from the CAN system-related modules using the M-MDS.

•  Start the engine.

•  Are any of the CAN related DTCs displayed?

Yes

Go back to Step 3.

No

Troubleshooting completed.

5

INSPECT COMMUNICATION CONDITION

•  Is there a response from the following modules?

―  PCM

―  EHPAS control module

―  DSC HU/CM or ABS HU/CM

―  Fuel additive control module

―  Keyless control module

―  Instrument cluster

―  Climate control unit

―  SAS control module

―  Water heater unit

―  PJB

Yes

Troubleshooting completed.

No

Go to the next step.

6

INSPECT MODULES THAT DO NOT RESPOND

•  Inspect the power supply and the ground circuit for any units that do not respond.

•  Are they normal?

Yes

Go to the next step.

No

Repair the malfunctioning part, then go back to Step 1.

7

INSPECT CONNECTOR AND WIRING HARNESS BETWEEN MODULES THAT DO NOT RESPOND AND DLC-2

•  Turn the ignition switch to the LOCK position.

•  Inspect the wiring harness and connector between any module that does not respond and the DLC-2.

PCM (LF, L3, L3 Turbo)—DLC-2

•  1AM—F

•  1AI—E

PCM (ZJ, ZY, Z6)—DLC-2

•  1W—F

•  1S—E

PCM (MZ-CD 1.6 (Y6))—DLC-2

•  301—F

•  309—E

PCM (MZR-CD (RF Turobo))—DLC-2

•  95—F

•  87—E

TCM—DLC-2

•  B—F

•  E—E

EHPAS control module—DLC-2

•  2B—F

•  2H—E

DSC HU/CM—DLC-2

•  P—F

•  D—E

ABS HU/CM—DLC-2

•  H—F

•  L—E

Fuel additive control module—DLC-2

•  7—F

•  6—E

Keyless control module—DLC-2

•  3X—F

•  3W—E

Instrument cluster—DLC-2

•  1I—F

•  1K—E

•  1M—L

•  1O—K

Climate control unit—DLC-2

•  X—L

•  W—K

SAS control module—DLC-2

•  1X—L

•  1T—K

Water heater unit—DLC-2

•  F—L

•  D—K

PJB—DLC-2

•  J-04 D—L

•  J-04 B—K

Yes

Go to the next step.

No

Repair the malfunctioning part, then go back to Step 1.

8

INSPECT WIRING HARNESS

•  Turn the ignition switch to the ON position (Engine off).

•  Measure the voltage between the following terminals.

―  DLC-2 terminals F and E

―  DLC-2 terminals L and K

•  Is the voltage 2.0—3.0 V?

Yes

Go to the next step.

No

Go to Step 12.

9

INSPECT WIRING HARNESS

•  Turn the ignition switch to the LOCK position.

•  Measure the resistance between the following terminals.

―  DLC-2 terminals F and E

―  DLC-2 terminals L and K

•  Is the resistance 59—65 ohms?

Yes

Replace the modules that do not respond, then go back to Step 1.

No

Go to the next step.

10

INSPECT PCM

•  Disconnect the PCM connector.

•  Measure the resistance between following terminals.

LF, L3, L3 Turbo

―  PCM terminals 1AM and 1AI (part-side)

Z6, ZJ

―  PCM terminals 1W and 1S (part-side)

MZ-CD 1.6 (Y6)

―  PCM terminals 301 and 309 (part-side)

MZR-CD (RF Turbo)

―  PCM terminals 95 and 87 (part-side)

•  Is the resistance 118—130 ohms?

Yes

Go to the next step.

No

Replace the PCM, then go to the next step.

11

INSPECT INSTRUMENT CLUSTER

•  Disconnect the instrument cluster connector.

•  Measure the resistance between the following terminals.

―  Instrument cluster terminals 1I and 1K (part-side)

―  Instrument cluster terminals 1M and 1O (part-side)

•  Is the resistance 118—130 ohms?

Yes

Go to the next step.

No

Replace the instrument cluster, then go to the next step.

12

CLASSIFY WIRING HARNESS MALFUNCTION OR MODULE MALFUNCTION

•  Turn the ignition switch to the LOCK position.

•  Disconnect the connector of any unit that does not respond. (If there are two or more units that do not respond, disconnect only one of the units.)

•  Turn the ignition switch to the ON position.

•  Measure the voltage between the following terminals.

―  DLC-2 terminals F and E

―  DLC-2 terminals L and K

•  Is voltage 2.0—3.0 V?

Yes

Go to the next step.

No

Retry this step with other module connector disconnected.

If all units that do not respond are disconnected, go to Step 14.

13

INSPECT WIRING HARNESS OF ANY UNIT THAT DOES NOT RESPOND

•  Turn the ignition switch to the LOCK position.

•  Inspect for continuity between the following connector terminals of any disconnected unit.

PCM (LF, L3, L3 Turbo)

•  1AM—other terminals

•  1AI—other terminals

PCM (ZJ, ZY, Z6)

•  1W—other terminals

•  1S—other terminals

PCM (MZ-CD 1.6 (Y6))

•  301—other terminals

•  309—other terminals

PCM (MZR-CD (RF Turbo))

•  95—other terminals

•  87—other terminals

TCM

•  B—other terminals

•  E—other terminals

EHPAS control module

•  2B—other terminals

•  2H—other terminals

DSC HU/CM

•  P—other terminals

•  D—other terminals

ABS HU/CM

•  H—other terminals

•  L—other terminals

Fuel additive control module

•  7—other terminals

•  6—other terminals

Keyless control module

•  3X—other terminals

•  3W—other terminals

Instrument cluster

•  1I—other terminals

•  1K—other terminals

•  1M—other terminals

•  1O—other terminals

Climate control unit

•  X—other terminals

•  W—other terminals

SAS control module

•  1X—other terminals

•  1T—other terminals

Audio unit (base module)

•  1O—other terminals

•  1Q—other terminals

Information display

•  J—other terminals

•  L—other terminals

Water heater unit

•  F—other terminals

•  D—other terminals

PJB

•  J-04 D—other terminals

•  J-04 B—other terminals

Is there continuity?

Yes

Repair or replace the wiring harness, then go back to Step 1.

No

Replace the disconnected unit, then go back to Step 1.

14

INSPECT CAN RELATED WIRING HARNESS

•  Inspect the related wiring harnesses (CAN_L and/or CAN_H) for the short circuit (to power supply or ground).

•  Is the wiring harness normal?

Yes

Repair or replace the wiring harness, then go back to Step 1.

No

Go back to Step 1.

STEP	INSPECTION		ACTION
1	INSPECT DTC INDICATION • Using the M-MDS, inspect if DTCs are displayed for the following module: ― PCM ― TCM ― EHPAS control module ― DSC HU/CM or ABS HU/CM ― Fuel additive control module ― Keyless control module ― Instrument cluster ― Climate control unit ― SAS control module ― Information display ― Water Heater unit ― PJB • Using the self-diagnostic function, inspect if DTCs are displayed for the following module: ― Audio unit (base module) ― Information display • Are any DTCs displayed?	Yes	Go to the next step.
1		No	Go to Step 5.
2	INSPECT CAN SYSTEM-RELATED DTC • Are any DTCs other than the following displayed? ― U0001 ― U0073 ― U0100 ― U0101 ― U0118 ― U0121 ― U0131 ― U0140 ― U0151 ― U0155 ― U0164 ― U0181 ― U0184 ― U0214 ― U0323 ― U0516 ― U1900 ― U2012 ― U2023 ― U2202 ― U2516 ― U2523 ― 16:Er12 ― 17:Er11	Yes	Repair the malfunctioning part by following the related DTC inspection. Go to the next step.
2		No	Go to the next step.
3	INSPECT CAN SYSTEM-RELATED DTC • Are any of the following DTCs displayed? ― PCM (except MZ-CD 1.6 (Y6)): U0073, U0101, U0121, U0155 ― PCM (MZ-CD 1.6 (Y6)): U0001, U0118 (High power-Euro 4 only), U0121, U0155 ― TCM : U0073, U0100 ― EHPAS control module: U0073, U0100, U2023 ― DSC HU/CM or ABS HU/CM: U1900, U2012, U2523 ― Fuel additive control module: U1900, U2516 ― Keyless control module: U0073, U0100, U0323, U2023 ― Instrument cluster: U0073, U0100, U0101, U0121, U0131, U0140, U0151, U0184, U0214, U2516 ― Climate control unit: U0140, U0155, U0184, U0516 ― SAS control module: U0073, U1900 ― Audio unit (base module): 16:Er12, 17:Er11 ― Information display: U0164, U0181, U0184, U2516 ― Water heater unit: U1900, U2516 ― PJB: U1900	Yes	Repair the malfunctioning part by following the DTC inspection. Go to the next step.
3		No	Troubleshooting completed.
4	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from the CAN system-related modules using the M-MDS. • Start the engine. • Are any of the CAN related DTCs displayed?	Yes	Go back to Step 3.
4		No	Troubleshooting completed.
5	INSPECT COMMUNICATION CONDITION • Is there a response from the following modules? ― PCM ― EHPAS control module ― DSC HU/CM or ABS HU/CM ― Fuel additive control module ― Keyless control module ― Instrument cluster ― Climate control unit ― SAS control module ― Water heater unit ― PJB	Yes	Troubleshooting completed.
5		No	Go to the next step.
6	INSPECT MODULES THAT DO NOT RESPOND • Inspect the power supply and the ground circuit for any units that do not respond. • Are they normal?	Yes	Go to the next step.
6		No	Repair the malfunctioning part, then go back to Step 1.
7	INSPECT CONNECTOR AND WIRING HARNESS BETWEEN MODULES THAT DO NOT RESPOND AND DLC-2 • Turn the ignition switch to the LOCK position. • Inspect the wiring harness and connector between any module that does not respond and the DLC-2. PCM (LF, L3, L3 Turbo)—DLC-2 • 1AM—F • 1AI—E PCM (ZJ, ZY, Z6)—DLC-2 • 1W—F • 1S—E PCM (MZ-CD 1.6 (Y6))—DLC-2 • 301—F • 309—E PCM (MZR-CD (RF Turobo))—DLC-2 • 95—F • 87—E TCM—DLC-2 • B—F • E—E EHPAS control module—DLC-2 • 2B—F • 2H—E DSC HU/CM—DLC-2 • P—F • D—E ABS HU/CM—DLC-2 • H—F • L—E Fuel additive control module—DLC-2 • 7—F • 6—E Keyless control module—DLC-2 • 3X—F • 3W—E Instrument cluster—DLC-2 • 1I—F • 1K—E • 1M—L • 1O—K Climate control unit—DLC-2 • X—L • W—K SAS control module—DLC-2 • 1X—L • 1T—K Water heater unit—DLC-2 • F—L • D—K PJB—DLC-2 • J-04 D—L • J-04 B—K	Yes	Go to the next step.
7		No	Repair the malfunctioning part, then go back to Step 1.
8	INSPECT WIRING HARNESS • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between the following terminals. ― DLC-2 terminals F and E ― DLC-2 terminals L and K • Is the voltage 2.0—3.0 V?	Yes	Go to the next step.
8		No	Go to Step 12.
9	INSPECT WIRING HARNESS • Turn the ignition switch to the LOCK position. • Measure the resistance between the following terminals. ― DLC-2 terminals F and E ― DLC-2 terminals L and K • Is the resistance 59—65 ohms?	Yes	Replace the modules that do not respond, then go back to Step 1.
9		No	Go to the next step.
10	INSPECT PCM • Disconnect the PCM connector. • Measure the resistance between following terminals. LF, L3, L3 Turbo ― PCM terminals 1AM and 1AI (part-side) Z6, ZJ ― PCM terminals 1W and 1S (part-side) MZ-CD 1.6 (Y6) ― PCM terminals 301 and 309 (part-side) MZR-CD (RF Turbo) ― PCM terminals 95 and 87 (part-side) • Is the resistance 118—130 ohms?	Yes	Go to the next step.
10		No	Replace the PCM, then go to the next step.
11	INSPECT INSTRUMENT CLUSTER • Disconnect the instrument cluster connector. • Measure the resistance between the following terminals. ― Instrument cluster terminals 1I and 1K (part-side) ― Instrument cluster terminals 1M and 1O (part-side) • Is the resistance 118—130 ohms?	Yes	Go to the next step.
11		No	Replace the instrument cluster, then go to the next step.
12	CLASSIFY WIRING HARNESS MALFUNCTION OR MODULE MALFUNCTION • Turn the ignition switch to the LOCK position. • Disconnect the connector of any unit that does not respond. (If there are two or more units that do not respond, disconnect only one of the units.) • Turn the ignition switch to the ON position. • Measure the voltage between the following terminals. ― DLC-2 terminals F and E ― DLC-2 terminals L and K • Is voltage 2.0—3.0 V?	Yes	Go to the next step.
12		No	Retry this step with other module connector disconnected. If all units that do not respond are disconnected, go to Step 14.
13	INSPECT WIRING HARNESS OF ANY UNIT THAT DOES NOT RESPOND • Turn the ignition switch to the LOCK position. • Inspect for continuity between the following connector terminals of any disconnected unit. PCM (LF, L3, L3 Turbo) • 1AM—other terminals • 1AI—other terminals PCM (ZJ, ZY, Z6) • 1W—other terminals • 1S—other terminals PCM (MZ-CD 1.6 (Y6)) • 301—other terminals • 309—other terminals PCM (MZR-CD (RF Turbo)) • 95—other terminals • 87—other terminals TCM • B—other terminals • E—other terminals EHPAS control module • 2B—other terminals • 2H—other terminals DSC HU/CM • P—other terminals • D—other terminals ABS HU/CM • H—other terminals • L—other terminals Fuel additive control module • 7—other terminals • 6—other terminals Keyless control module • 3X—other terminals • 3W—other terminals Instrument cluster • 1I—other terminals • 1K—other terminals • 1M—other terminals • 1O—other terminals Climate control unit • X—other terminals • W—other terminals SAS control module • 1X—other terminals • 1T—other terminals Audio unit (base module) • 1O—other terminals • 1Q—other terminals Information display • J—other terminals • L—other terminals Water heater unit • F—other terminals • D—other terminals PJB • J-04 D—other terminals • J-04 B—other terminals Is there continuity?	Yes	Repair or replace the wiring harness, then go back to Step 1.
13		No	Replace the disconnected unit, then go back to Step 1.
14	INSPECT CAN RELATED WIRING HARNESS • Inspect the related wiring harnesses (CAN_L and/or CAN_H) for the short circuit (to power supply or ground). • Is the wiring harness normal?	Yes	Repair or replace the wiring harness, then go back to Step 1.
14		No	Go back to Step 1.