PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION

id0902e6830500

System Wiring Diagram

am2zzw00006718

PCM

1. Inspect the display of DTC U0101, U0121 and/or U0155 using the WDS or equivalent.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status		Malfunction location
Module	ABS HU/CM	Instrument cluster	Malfunction location
PCM	—	—	• Wiring harness A • PCM
	—	×	• Wiring harness D • ABS HU/CM
	—	×	• Wiring harness E • Wiring harness G • Instrument cluster

EPS Control Module

1. Inspect the display of DTC U0100 and/or U2023 using the WDS or equivalent.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status	Malfunction location
Module	PCM	Malfunction location
EPS control module	—	• Wiring harness A • Wiring harness B • EPS control module • PCM

ABS HU/CM

Note

• There is no service code data monitor in the ABS HU/CM that determines signal quality between it and the instrument cluster. Due to this, determine the malfunction location using the data monitor on the instrument cluster side.

1. Inspect the display of DTC U2522 and/or U2523 using the WDS or equivalent.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status		Malfunction location
Module	PCM	Instrument cluster	Malfunction location
ABS HU/CM	—	—	• Wiring harness D • ABS HU/CM
	—	×	• Wiring harness A • Wiring harness C • PCM
	×	—	• Wiring harness E • Wiring harness G • Instrument cluster

Instrument Cluster

1. Inspect the display of DTC U1900 using the WDS or equivalent.

(See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

2. Access and monitor the “PCM_MSG” and “ABS_MSG” of PID using the WDS or equivalent.

3. Referring to the PID/DATA MONITOR TABLE, confirm the display status of the PID.

(See PID/DATA MONITOR TABLE [MULTIPLEX COMMUNICATION SYSTEM].)

4. Referring to the following table, determine the malfunctioning part of the CAN system.

×: Normal

—: Communication error

Module	Communication status		Malfunction location
Module	PCM	ABS HU/CM	Malfunction location
Instrument cluster	—	—	• Wiring harness E • Wiring harness G • Instrument cluster
	—	×	• Wiring harness A • Wiring harness C • PCM
	×	—	• Wiring harness D • ABS HU/CM

Repair Procedure

1. Inspect the connector of malfunctioning module.

• If there is any malfunction, repair or replace the connector.

2. Inspect the malfunctioning wiring harnesses as follow:

• If there is any malfunction, repair or replace the wiring harnesses.

• If there is no malfunction, replace the malfunctioning module.

― Short to GND

― Short to power supply

― Twisted pair short each other

― Open circuit

3. Make sure to reconnect all disconnected connectors.

4. Clear the CAN system related DTCs using the WDS or equivalent.

5. Verify if the CAN system related DTCs are displayed using the WDS or equivalent.

• If the same following DTCs are present, replace the malfunctioning module.

― U0073 (PCM, EPS control module)

― U2012 (ABS HU/CM)

― U2516 (instrument cluster)

• If other DTC is present, perform the appropriate DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].)