PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION

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PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION

B3E090255430W03

## System Wiring Diagram

## PCM

1. Inspect the display of DTC 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
--- | --- | ---
DSC HU/CM or ABS HU/CM | Instrument cluster
PCM | - | - | • Wiring harness A • Wiring harness C • Instrument cluster • PCM
× | - | • Wiring harness E • Instrument cluster
- | × | • Wiring harness D • DSC HU/CM or ABS HU/CM

## EHPAS 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
--- | --- | ---
PCM
EHPAS control module | - | • Wiring harness A • Wiring harness B • EHPAS control module • PCM

## DSC HU/CM or ABS HU/CM

1. Inspect the display of DTC U1900, U2202 (with DSC) 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
--- | --- | ---
PCM
DSC HU/CM or ABS HU/CM | - | • Wiring harness A • Wiring harness C • Wiring harness D • PCM

## Instrument Cluster

1. Inspect the display of DTC U0100, U0121 and/or U0131, 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
--- | --- | ---
PCM | DSC HU/CM or ABS HU/CM | EHPAS control module
Instrument cluster | - | - | - | • Wiring harness E • PCM • DSC HU/CM or ABS HU/CM • EHPAS control module • Instrument cluster
- | - | × | • Wiring harness A • Wiring harness D • PCM • DSC HU/CM or ABS HU/CM
- | × | - | • Wiring harness C • PCM • EHPAS control module
- | × | × | • Wiring harness A • PCM
× | - | - | • Wiring harness B • Wiring harness D • DSC HU/CM or ABS HU/CM • EHPAS control module
× | - | × | • Wiring harness D • DSC HU/CM or ABS HU/CM
× | × | - | • Wiring harness B • EHPAS control module

3. Inspect the display of DTC U0140, U0151 and/or U0184, using the WDS or equivalent. (See DTC 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
--- | --- | ---
PJB | SAS control module | Audio unit (base module)
Instrument cluster | - | - | - | • Wiring harness F • Instrument cluster • PJB • SAS control module • Audio unit (base module)
- | - | × | • Wiring harness H • Wiring harness J • PJB • SAS control module
- | × | - | • Wiring harness I • Wiring harness J • PJB • Audio unit (base module)
- | × | × | • Wiring harness J • PJB
× | - | - | • Wiring harness H • Wiring harness I • SAS control module • Audio unit (base module)
× | - | × | • Wiring harness H • SAS control module
× | × | - | • Wiring harness I • Audio unit (base module)

## Climate Control Unit

1. Inspect the display of DTC U0140, U0155 and/or U0184, 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
--- | --- | ---
PJB | Instrument cluster | Audio unit (base module)
Climate control unit | - | - | - | • Wiring harness G • Climate control unit • PJB • Instrument cluster • Audio unit (base module)
- | - | × | • Wiring harness F • Wiring harness J • PJB • Instrument cluster
- | × | - | • Wiring harness I • Wiring harness J • PJB • Audio unit (base module)
- | × | × | • Wiring harness J • PJB
× | - | - | • Wiring harness F • Wiring harness I • Instrument cluster • Audio unit (base module)
× | - | × | • Wiring harness F • Instrument cluster
× | × | - | • Wiring harness I • Audio unit (base module)

## SAS Control Module

1. Inspect the display of DTC U1900 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
--- | --- | ---
Instrument cluster
SAS control module | - | • Wiring harness F • Wiring harness H • SAS control module • Instrument cluster

## PJB

1. Inspect the display of DTC U1900 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
--- | --- | ---
Climate control unit Audio unit (base module) Instrument cluster

PJB

-

• Wiring harness F
• Wiring harness G
• Wiring harness I
• Wiring harness J
• PJB
• Climate control unit
• Audio unit (base module)
• Instrument cluster

## 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, EHPAS control module, instrument cluster, SAS control module)
  - U0516 (Climate control unit)
  - U1900 (PJB)
  - U2012 (DSC HU/CM or ABS HU/CM)
  - U2516 (Instrument cluster)

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