Pinpoint Test AG: Intermittent Medium Speed Controller Area Network (MS-CAN) Communication, Modules Not Responding during Test
Communications Network
Pinpoint Test AG: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
An open circuit Medium Speed Controller Area Network (MS-CAN) (+) or circuit MS-CAN (Medium Speed Controller Area Network) (-) may cause intermittent or unreliable communication to all modules on the MS-CAN (Medium Speed Controller Area Network).
The following modules communicate on the MS-CAN (Medium Speed Controller Area Network) :
- 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)
- 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)
- Liftgate/Trunk Module (LTM) (if equipped)
- Passenger Climate Controlled Seat Module (PCSM) (if equipped)
- Rear Entertainment Module (RETM) (if equipped)
- Rear Heating Ventilation Air Conditioning (RHVAC) module (if equipped)
- Remote Function Actuator (RFA) module (if equipped)
- Side Obstacle Detection Control Module - Left (SOD-L) (if equipped)
- Side Obstacle Detection Control Module - Right (SOD-R) (if equipped)
- Smart Junction Box (SJB)
In the event that either the MS-CAN (Medium Speed Controller Area Network) (+) or MS-CAN (Medium Speed Controller Area Network) (-) circuit becomes open to a module on the network, unreliable network communication to all modules on the network may result.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
PINPOINT TEST AG : INTERMITTENT NO MS-CAN (Medium Speed Controller Area Network) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
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: Various network DTCs set while disabling modules in this test procedure which need to be cleared after the diagnostic procedure is completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
AG1 CHECK THE DLC (Data Link Connector) PINS FOR DAMAGE
- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC (Data Link Connector) pins 3 and 11 for damage.
Are DLC (Data Link Connector) pins 3 and 11 OK?
Yes
GO to AG2.
No
REPAIR the DLC (Data Link Connector) as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
AG2 CHECK THE MS-CAN (Medium Speed Controller Area Network) TERMINATION RESISTANCE
- Disconnect: Negative Battery Cable.
- Measure the resistance between the DLC (Data Link Connector) C251-3, circuit VDB06 (GY/OG), harness side and the DLC (Data Link Connector) C251-11, circuit VDB07 (VT/OG), harness side.
Is the resistance between 54 and 66 ohms?
Yes
GO to AG3.
No
An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG3 CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the DLC (Data Link Connector) C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC (Data Link Connector) C251-11, circuit VDB07 (VT/OG), harness side and ground.
Are the resistances greater than 1,000 ohms?
Yes
GO to AG4.
No
An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG4 CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Measure the voltage between the DLC (Data Link Connector) C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC (Data Link Connector) C251-11, circuit VDB07 (VT/OG), harness side and ground.
Are the voltages greater than 6 volts?
Yes
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to AG5.
AG5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB (Smart Junction Box) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: Smart Junction Box (SJB) Fuse 5 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to Pinpoint Test U. Pinpoint Test U: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse.
If the vehicle is equipped with a Dual Climate Controlled Seat Module (DCSM), GO to AG6.
If the vehicle is not equipped with a DCSM (Dual Climate Controlled Seat Module), GO to AG7.
AG6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DCSM (Dual Climate Controlled Seat Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: Battery Junction Box (BJB) Fuse 8 (30A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to Pinpoint Test S. Pinpoint Test S: The Dual Climate Controlled Seat Module (DCSM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse.
If the vehicle is equipped with a Passenger Climate Controlled Seat Module (PCSM), GO to AG7.
If the vehicle is not equipped with a PCSM (Passenger Climate Controlled Seat Module), GO to AG8.
AG7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PCSM (Passenger Climate Controlled Seat Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: Battery Junction Box (BJB) Fuse 7 (30A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to Pinpoint Test P. Pinpoint Test P: The PCSM (Passenger Climate Controlled Seat Module) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to AG8.
AG8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM (Audio Control Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuse 39 (20A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to Pinpoint Test M. Pinpoint Test M: The Audio Control Module (ACM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse.
If the vehicle is equipped with an audio Digital Signal Processing (DSP) module, GO to AG9.
If the vehicle is not equipped with an audio DSP (Digital Signal Processing) module, GO to AG10.
AG9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO DSP (Digital Signal Processing) MODULE DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) fuses 18 (20A) and 19 (25A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuses. GO to Pinpoint Test W. Pinpoint Test W: The Audio Digital Signal Processing (DSP) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to AG10.
AG10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE AND FCIM (Front Controls Interface Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuse 15 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to AG11.
No
INSTALL the removed fuse. GO to AG12.
AG11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE OR FCIM (Front Controls Interface Module) DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: HVAC Module C2356A.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: FCIM (Front Controls Interface Module) C2403.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the HVAC module disconnected, GO to Pinpoint Test V. Pinpoint Test V: The HVAC Module Does Not Respond To The Scan Tool
For restored operation with the FCIM (Front Controls Interface Module) disconnected, GO to Pinpoint Test N. Pinpoint Test N: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM (Accessory Protocol Interface Module), LTM (Liftgate/Trunk Module), AND RETM (Rear Entertainment Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: Battery Junction Box (BJB) Fuse 34 (30A).
- Disconnect: SJB (Smart Junction Box) Fuse 14 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuses. GO to AG13.
No
INSTALL the removed fuses. GO to AG14.
AG13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM (Accessory Protocol Interface Module), LTM (Liftgate/Trunk Module) OR RETM (Rear Entertainment Module) DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: LTM (Liftgate/Trunk Module) C4174B.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: RETM (Rear Entertainment Module) C2949B.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the APIM (Accessory Protocol Interface Module) disconnected, GO to Pinpoint Test AD. Pinpoint Test AD: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
For restored operation with the LTM (Liftgate/Trunk Module) disconnected, GO to Pinpoint Test O. Pinpoint Test O: The Liftgate/Trunk Module (LTM) Does Not Respond To The Scan Tool
For restored operation with the RETM (Rear Entertainment Module) disconnected, GO to Pinpoint Test AA. Pinpoint Test AA: The RETM (Rear Entertainment Module) Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG14 VERIFY VEHICLE EQUIPMENT - ILCM (Interior Lighting Control Module) AND/OR RHVAC (Rear Heating Ventilation Air Conditioning) MODULE
- Inspect the vehicle for an Interior Lighting Control Module (ILCM) and/or Rear Heating Ventilation Air Conditioning (RHVAC) module.
Is the vehicle equipped with an ILCM (Interior Lighting Control Module) and/or RHVAC (Rear Heating Ventilation Air Conditioning) module?
Yes
GO to AG15.
No
GO to AG16.
AG15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM (Interior Lighting Control Module)
AND RHVAC (Rear Heating Ventilation Air Conditioning) MODULE DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuse 16 (15A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to AG16.
No
INSTALL the removed fuse. GO to AG17.
AG16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM (Interior Lighting Control Module) OR RHVAC (Rear Heating Ventilation Air Conditioning) MODULE DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: ILCM (Interior Lighting Control Module) C3256.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: RHVAC (Rear Heating Ventilation Air Conditioning) Module C3198.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the ILCM (Interior Lighting Control Module) disconnected, GO to Pinpoint Test Q. Pinpoint Test Q: The Interior Lighting Control Module (ILCM) Does Not Respond To The Scan Tool
For restored operation with the RHVAC (Rear Heating Ventilation Air Conditioning) module disconnected, GO to Pinpoint Test AB. Pinpoint Test AB: The RHVAC (Rear Heating Ventilation Air Conditioning) Module Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM (Driver Door Module) AND DSM (Driver Seat Module) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: BJB (Battery Junction Box) Fuse 32 (30A).
- Disconnect: SJB (Smart Junction Box) Fuse 13 (5A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuses. GO to AG18.
No
INSTALL the removed fuses. GO to AG19.
AG18 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM (Driver Door Module) OR DSM (Driver Seat Module) DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: DDM (Driver Door Module) C501A.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: DSM (Driver Seat Module) C341D.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the DDM (Driver Door Module) disconnected, GO to Pinpoint Test X. Pinpoint Test X: The Driver Door Module (DDM) Does Not Respond To The Scan Tool
For restored operation with the DSM (Driver Seat Module) disconnected, GO to Pinpoint Test T. Pinpoint Test T: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG19 VERIFY VEHICLE EQUIPMENT - RFA (Remote Function Actuator) MODULE
- Inspect the vehicle for a Remote Function Actuator (RFA) module.
Is the vehicle equipped with an RFA (Remote Function Actuator) module?
Yes
GO to AG20.
No
GO to AG21.
AG20 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RFA (Remote Function Actuator) MODULE DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuses 12 (7.5A) and 27 (20A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuses. GO to Pinpoint Test AC. Pinpoint Test AC: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to AG21.
AG21 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPC (Instrument Panel Cluster) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuses 26 (10A) and 29 (5A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuses. GO to Pinpoint Test C. Pinpoint Test C: The Instrument Panel Cluster (IPC) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses.
If the vehicle is equipped with a Headlamp Control Module 2 (HCM-2) and/or Side Obstacle Detection Control Module - Left (SOD-L) and Side Obstacle Detection Control Module - Right (SOD-R), GO to AG22.
If the vehicle is not equipped with an HCM-2 (Headlamp Control Module 2) and/or SOD-L (Side Obstacle Detection Control Module - Left) and SOD-R (Side Obstacle Detection Control Module - Right), an intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG22 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2 (Headlamp Control Module 2), SOD-L (Side Obstacle Detection Control Module - Left) AND SOD-R (Side Obstacle Detection Control Module - Right) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB (Smart Junction Box) Fuse 35 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
INSTALL the removed fuse. GO to AG23.
No
INSTALL the removed fuse. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AG23 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2 (Headlamp Control Module 2), SOD-L (Side Obstacle Detection Control Module - Left) OR SOD-R (Side Obstacle Detection Control Module - Right) DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: HCM-2 (Headlamp Control Module 2) Inline C913.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: SOD-L (Side Obstacle Detection Control Module - Left) C4230.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Disconnect: SOD-R (Side Obstacle Detection Control Module - Right) C4229.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the HCM-2 (Headlamp Control Module 2) disconnected, GO to Pinpoint Test R. Pinpoint Test R: The Headlamp Control Module 2 (HCM-2) Does Not Respond To The Scan Tool
For restored operation with the SOD-L (Side Obstacle Detection Control Module - Left) disconnected, GO to Pinpoint Test Y. Pinpoint Test Y: The Side Obstacle Detection Control Module - Left (SOD-L) Does Not Respond To The Scan Tool
For restored operation with the SOD-R (Side Obstacle Detection Control Module - Right) disconnected, GO to Pinpoint Test Z. Pinpoint Test Z: The Side Obstacle Detection Control Module-Right (SOD-R)Does Not Respond To The Scan Tool/Cannot Be Configured
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Test AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding