AC21-AC35
Communications Network
Pinpoint Test AC: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable.
The termination modules for the HS-CAN (High Speed Controller Area Network) are the BCM-HVTB (Battery Control Module - High Voltage Traction Battery) and the PCM.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Data Link Connector (DLC)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Body Control Module (BCM)
- Front Lighting Control Module (FLM)
- Cruise-Control Module (C-CM) (if equipped)
- Headlamp Control Module (HCM) (if equipped)
- Head Up Display (HUD) module (if equipped)
- Instrument Panel Cluster (IPC)
- Occupant Classification System Module (OCSM)
- Parking Aid Module (PAM) (if equipped)
- PCM
- Restraints Control Module (RCM)
- Steering Column Control Module (SCCM)
PINPOINT TEST AC : NO HS-CAN (High 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
- Various modules set network DTCs during this test procedure. Clear DTCs from all modules after completing the diagnostic procedure.
- Failure to disconnect the battery when instructed results in false resistance readings.
AC21 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SCCM (Steering Column Control Module) DISCONNECTED
NOTE: When re-running the network test, close the Network Test application first or the screen display reverts back to the prior run Network Test results.
- Disconnect: SCCM (Steering Column Control Module) C2414A.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other modules pass the network test?
Yes
Connect the SCCM (Steering Column Control Module). GO to Pinpoint Test G Pinpoint Test G: The Steering Column Control Module (SCCM) Does Not Respond To The Scan Tool.
No
Connect the SCCM (Steering Column Control Module). GO to AC22
AC22 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE FLM (Front Lighting Control Module) DISABLED
NOTE: When re-running the network test, close the Network Test application first or the screen display reverts back to the prior run Network Test results.
- Disconnect: BJB (Battery Junction Box) Fuse 23 (15A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other modules pass the network test?
Yes
INSTALL the removed fuses. GO to Pinpoint Test M. Pinpoint Test M: The Front Lighting Control Module (FLM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. The HS-CAN (High Speed Controller Area Network) tests within specification. Verify the correct operation of the scan tool on a known good vehicle.
AC23 CHECK THE APIM (Accessory Protocol Interface Module) FOR CORRECT 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). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC24 CHECK THE ABS MODULE FOR CORRECT 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. 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC25 CHECK THE BCM (Body Control Module) FOR CORRECT OPERATION
- Disconnect all the BCM (Body Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM (Body Control Module) connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new BCM (Body Control Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC26 CHECK THE C-CM (Cruise-Control Module) FOR CORRECT OPERATION
- Disconnect the C-CM (Cruise-Control Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the C-CM (Cruise-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 C-CM (Cruise-Control Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC27 CHECK THE FLM (Front Lighting Control Module) FOR CORRECT OPERATION
- Disconnect the FLM (Front Lighting Control Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FLM (Front Lighting 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 FLM (Front Lighting Control Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC28 CHECK THE HCM (Headlamp Control Module) FOR CORRECT OPERATION
- Disconnect all the LH headlamp connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LH headlamp connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new LH headlamp. 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC29 CHECK THE HUD (Head Up Display) MODULE FOR CORRECT OPERATION
- Disconnect the HUD (Head Up Display) module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the HUD (Head Up Display) 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 HUD (Head Up Display) module. 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC30 CHECK THE IPC (Instrument Panel Cluster) FOR CORRECT OPERATION
- Disconnect the IPC (Instrument Panel Cluster) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IPC (Instrument Panel 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 IPC (Instrument Panel Cluster). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC31 CHECK THE OCSM (Occupant Classification System Module) FOR CORRECT 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.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new OCSM (Occupant Classification System Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC32 CHECK THE PAM (Parking Aid Module) FOR CORRECT 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). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC33 CHECK THE PCM FOR CORRECT OPERATION
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new PCM. 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC34 CHECK THE RCM (Restraints Control Module) FOR CORRECT 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 are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new RCM (Restraints Control Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.
AC35 CHECK THE SCCM (Steering Column Control Module) FOR CORRECT OPERATION
- Disconnect all the SCCM (Steering Column Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SCCM (Steering Column Control Module) connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SCCM (Steering Column Control Module). 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. CLEAR the DTCs. CONNECT all modules. REPEAT the Network Test with the scan tool.