Part 3

Communications Network

Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding

Normal Operation

The Medium Speed Controller Area Network (MS-CAN) uses an unshielded twisted pair cable.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Accessory Protocol Interface Module (APIM) (if equipped)

- Audio Control Module (ACM)

- Audio Digital Signal Processing (DSP) module (if equipped)

- Driver Door Module (DDM) (if equipped)

- Driver Seat Module (DSM) (if equipped)

- Dual Climate Controlled Seat Module (DCSM) (if equipped)

- Front Controls Interface Module (FCIM)

- Liftgate/Trunk Module (LTM)

- Passenger Climate Controlled Seat Module (PCSM) (part of the steering gear) (if equipped)

- Headlamp Control Module 2 (HCM-2) (if equipped)

- HVAC module (if equipped)

- Interior Lighting Control Module (ILCM) (if equipped)

- Instrument Panel Cluster (IPC) (gateway module)

- Rear Entertainment Module (RETM) (if equipped)

- Rear Heating Ventilation Air Conditioning (RHVAC) module (if equipped)

- Remote Function Actuator (RFA) module (if equipped)

- Smart Junction Box (SJB)

- Side Obstacle Detection Control Module - Left (SOD-L) (if equipped)

- Side Obstacle Detection Control Module - Right (SOD-R) (if equipped)

PINPOINT TEST AH : NO MS-CAN (Medium Speed Controller Area Network) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Communications Network

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.

AH76 CHECK FOR CORRECT DCSM (Dual Climate Controlled Seat Module) OPERATION

- Disconnect all the DCSM (Dual Climate Controlled Seat Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the DCSM (Dual Climate Controlled Seat Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new DCSM (Dual Climate Controlled Seat Module). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

AH77 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION

- Disconnect the APIM (Accessory Protocol Interface Module) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the APIM (Accessory Protocol Interface Module) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new APIM (Accessory Protocol Interface Module). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

AH78 CHECK FOR CORRECT DDM (Driver Door Module) OPERATION

- Disconnect all the DDM (Driver Door Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the DDM (Driver Door Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new DDM (Driver Door Module). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

AH79 CHECK FOR CORRECT HCM-2 (Headlamp Control Module 2) OPERATION

- Disconnect the HCM-2 (Headlamp Control Module 2) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the HCM-2 (Headlamp Control Module 2) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new HCM-2 (Headlamp Control Module 2). CONNECT all modules. CLEAR the DTCs. CONNECT all modules. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. REPEAT the network test with the scan tool.

AH80 CHECK FOR CORRECT RHVAC (Rear Heating Ventilation Air Conditioning) MODULE OPERATION

- Disconnect the RHVAC (Rear Heating Ventilation Air Conditioning) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the RHVAC (Rear Heating Ventilation Air Conditioning) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new RHVAC (Rear Heating Ventilation Air Conditioning). CONNECT all modules. CLEAR the DTCs. CONNECT all modules. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. REPEAT the network test with the scan tool.

AH81 CHECK FOR CORRECT RETM (Rear Entertainment Module) OPERATION

- Disconnect all the RETM (Rear Entertainment Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the RETM (Rear Entertainment Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new RETM (Rear Entertainment Module). CONNECT all modules. CLEAR the DTCs. CONNECT all modules. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. REPEAT the network test with the scan tool.

AH82 CHECK FOR CORRECT SOD-L (Side Obstacle Detection Control Module - Left) OPERATION

- Disconnect the SOD-L (Side Obstacle Detection Control Module - Left) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the SOD-L (Side Obstacle Detection Control Module - Left) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new SOD-L (Side Obstacle Detection Control Module - Left). CONNECT all modules. CLEAR the DTCs. CONNECT all modules. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. REPEAT the network test with the scan tool.

AH83 CHECK FOR CORRECT SOD-R (Side Obstacle Detection Control Module - Right) OPERATION

- Disconnect the SOD-R (Side Obstacle Detection Control Module - Right) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the SOD-R (Side Obstacle Detection Control Module - Right) connector and make sure it seats correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new SOD-R (Side Obstacle Detection Control Module - Right). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.