Part 2

Communications Network

Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information Electrical Diagrams.

Refer to Wiring Diagram Set 23, Electronic Engine Controls - 2.5L for schematic and connector information Electrical Diagrams.

Normal Operation

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

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- 4X4 control module (if equipped)

- ABS module

- Air Conditioning Compressor Module (ACCM) (hybrid)

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

- Instrument Cluster (IC)

- Occupant Classification System Module (OCSM)

- PCM

- Parking Aid Module (PAM) (if equipped)

- Power Steering Control Module (PSCM)

- Restraints Control Module (RCM)

- Battery Control Module - High Voltage Traction Battery (BCM-HVTB) (hybrid)

- Transmission Control Module (TCM) (hybrid)


T26 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM (Restraints Control Module) DISCONNECTED

- Disconnect: RCM (Restraints Control Module) C2041B.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T38.

No
GO to T27.

T27 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCSM (Occupant Classification System Module) DISCONNECTED

- Disconnect: OCSM (Occupant Classification System Module) C3285.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T39.

No
If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), GO to T28.

If the vehicle is not equipped with an APIM (Accessory Protocol Interface Module), GO to T29.

T28 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM (Accessory Protocol Interface Module) DISCONNECTED

- Disconnect: APIM (Accessory Protocol Interface Module) C3338.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T40.

No
GO to T29.

T29 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC (Instrument Cluster) DISCONNECTED

- Disconnect: IC (Instrument Cluster) C220.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T41.

No
If the vehicle is equipped with a Parking Aid Module (PAM), GO to T30.

If the vehicle is not equipped with a PAM (Parking Aid Module), GO to T31.

T30 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PAM (Parking Aid Module) DISCONNECTED

- Disconnect: PAM (Parking Aid Module) C4014.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T42.

No
GO to T31.

T31 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PSCM (Power Steering Control Module) DISCONNECTED

- Disconnect: PSCM (Power Steering Control Module) C2231A.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T43.

No
For hybrid, GO to T32.

For non-hybrid, REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

T32 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE TCM (Transmission Control Module) DISCONNECTED

- Disconnect: TCM (Transmission Control Module) C1458A.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T44.

No
GO to T33.

T33 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE BCM-HVTB (Battery Control Module - High Voltage Traction Battery) DISCONNECTED

WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.

WARNING: Always wear high-voltage insulated safety gloves with leather outer gloves and a face shield when servicing the battery pack sensor module (BPSM) and never remove the high-voltage BPSM connector unless directed by a service procedure. High voltage is present at the BPSM at all times, even with service disconnect plug removal. Depowering the system will not remove voltage from the BPSM connector with the orange harness. Follow all service instructions. Failure to follow these instructions may result in serious personal injury or death.

- Disconnect: BCM-HVTB (Battery Control Module - High Voltage Traction Battery) C4227A.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T45.

No
GO to T34.

T34 CHECK THE HS-CAN (High Speed Controller Area Network) (+) AND HS-CAN (High Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ACCM (Air Conditioning Compressor Module) DISCONNECTED

- Disconnect: ACCM (Air Conditioning Compressor Module) C1469A.

- Measure the resistance between the DLC (Data Link Connector) C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC (Data Link Connector) C251-14, circuit VDB05 (WH), harness side and ground.





Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to T46.

No
REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

T35 CHECK FOR CORRECT PCM OPERATION

- Disconnect all the PCM connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the PCM 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 PCM. 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.

T36 CHECK FOR CORRECT ABS MODULE OPERATION

- Disconnect the ABS module connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the ABS 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 ABS 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.

T37 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION

- Disconnect the 4X4 control module connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the 4X4 control 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 4X4 control 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.

T38 CHECK FOR CORRECT RCM (Restraints Control Module) OPERATION

- Disconnect all the RCM (Restraints Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the RCM (Restraints Control Module) connectors and make sure they seat correctly.

- Verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new RCM (Restraints Control 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.

T39 CHECK FOR CORRECT OCSM (Occupant Classification System Module) OPERATION

- Disconnect the OCSM (Occupant Classification System Module) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the OCSM (Occupant Classification System Module) connector and make sure it seats correctly.

- Verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new OCSM (Occupant Classification System 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.

T40 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.

- 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. REPOWER the SRS (Supplemental Restraint System). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

T41 CHECK FOR CORRECT IC (Instrument Cluster) OPERATION

- Disconnect the IC (Instrument Cluster) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the IC (Instrument Cluster) 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 IC (Instrument Cluster). 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.

T42 CHECK FOR CORRECT PAM (Parking Aid Module) OPERATION

- Disconnect the PAM (Parking Aid Module) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the PAM (Parking Aid 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 PAM (Parking Aid 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.

T43 CHECK FOR CORRECT PSCM (Power Steering Control Module) OPERATION

- Disconnect all the PSCM (Power Steering Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the PSCM (Power Steering Control 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 steering column. 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.

T44 CHECK FOR CORRECT TCM (Transmission Control Module) OPERATION

NOTE: Do not disconnect the high-voltage cables or connectors in the following step.

- Disconnect the TCM (Transmission Control Module) low voltage connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the TCM (Transmission Control Module) low voltage 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 TCM (Transmission Control 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.

T45 CHECK FOR CORRECT BCM-HVTB (Battery Control Module - High Voltage Traction Battery) OPERATION

NOTE: Do not disconnect the high-voltage cables or connectors in the following step.

- Disconnect the BCM-HVTB (Battery Control Module - High Voltage Traction Battery) low voltage connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the BCM-HVTB (Battery Control Module - High Voltage Traction Battery) low voltage 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 High Voltage Traction Battery (HVTB). 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.

T46 CHECK FOR CORRECT ACCM (Air Conditioning Compressor Module) OPERATION

NOTE: Do not disconnect the high-voltage cables or connectors in the following step.

- Disconnect the ACCM (Air Conditioning Compressor Module) low voltage connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the ACCM (Air Conditioning Compressor Module) low voltage 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 High Voltage Traction Battery (HVTB). 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.