Pinpoint Test AC: Intermittent No Med Spd Controller Area Network (MS-CAN) Communication, 1 Or More Modules Are Not Responding
Communications Network
Pinpoint Test AC: 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)
- Front Display Interface Module (FDIM)
- Global Positioning System Module (GPSM) (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)
- 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)
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 AC : 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.
AC1 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 AC2.
No
REPAIR the DLC (Data Link Connector) as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
AC2 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 AC3.
No
An intermittent fault is not present. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AC3 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 AC4.
No
An intermittent fault is not present. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AC4 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.
Is the voltage greater than 6 volts?
Yes
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to AC5.
AC5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB (Smart Junction Box) DISABLED
- 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 AC6.
If the vehicle is not equipped with a DCSM (Dual Climate Controlled Seat Module), GO to AC7.
AC6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DCSM (Dual Climate Controlled Seat Module) DISABLED
- Disconnect: Battery Junction Box (BJB) Fuse 22 (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 Z. Pinpoint Test Z: The Dual Climate Controlled Seat Module (DCSM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to AC7.
AC7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM (Audio Control Module) DISABLED
- 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 AC8.
If the vehicle is not equipped with an audio DSP (Digital Signal Processing) module, GO to AC9.
AC8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO DSP (Digital Signal Processing) MODULE DISABLED
- Disconnect: SJB (Smart Junction Box) Fuse 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 fuse. 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 fuse. GO to AC9.
AC9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE DISABLED
- 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 Pinpoint Test V. Pinpoint Test V: The HVAC Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. If the vehicle is equipped with an APIM (Accessory Protocol Interface Module), FDIM (Front Display Interface Module), ILCM (Interior Lighting Control Module) and/or GPSM (Global Positioning System Module), GO to AC10.
If the vehicle is not equipped with an APIM (Accessory Protocol Interface Module), FDIM (Front Display Interface Module), DSM (Driver Seat Module) and/or GPSM (Global Positioning System Module), GO to AC18.
AC10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM (Accessory Protocol Interface Module), FDIM (Front Display Interface Module), GPSM (Global Positioning System Module) AND DSM (Driver Seat Module) DISABLED
- 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 fuse. If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), GO to AC11.
If the vehicle is not equipped with an APIM (Accessory Protocol Interface Module), GO to AC12.
No
INSTALL the removed fuse. GO to AC12.
AC11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM (Accessory Protocol Interface Module) DISCONNECTED
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- 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 the APIM (Accessory Protocol Interface Module). GO to Pinpoint Test L. Pinpoint Test L: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
No
CONNECT the APIM (Accessory Protocol Interface Module). GO to AC12.
AC12 VERIFY VEHICLE EQUIPMENT - FDIM (Front Display Interface Module)
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.
- Inspect the vehicle for a Front Display Interface Module (FDIM).
Is the vehicle equipped with an FDIM (Front Display Interface Module)?
Yes
GO to AC13.
No
GO to AC14.
AC13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE FDIM (Front Display Interface Module) DISCONNECTED
- Disconnect: FDIM (Front Display Interface Module) C2123.
- 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 the FDIM (Front Display Interface Module). GO to Pinpoint Test O. Pinpoint Test O: The Front Display Interface Module (FDIM) Does Not Respond To The Scan Tool
No
CONNECT the FDIM (Front Display Interface Module). GO to AC14.
AC14 VERIFY VEHICLE EQUIPMENT - GPSM (Global Positioning System Module)
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.
- Inspect the vehicle for a Global Positioning System Module (GPSM).
Is the vehicle equipped with a GPSM (Global Positioning System Module)?
Yes
GO to AC15.
No
GO to AC16.
AC15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE GPSM (Global Positioning System Module) DISCONNECTED
- Disconnect: GPSM (Global Positioning System Module) C2398.
- 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 the GPSM (Global Positioning System Module). GO to Pinpoint Test P. Pinpoint Test P: The Global Positioning System Module (GPSM) Does Not Respond To The Scan Tool
No
CONNECT the GPSM (Global Positioning System Module). GO to AC16.
AC16 VERIFY VEHICLE EQUIPMENT - DSM (Driver Seat Module)
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.
- Inspect the vehicle for an DSM (Driver Seat Module).
Is the vehicle equipped with an DSM (Driver Seat Module)?
Yes
GO to AC17.
No
An intermittent fault is not present. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AC17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DSM (Driver Seat Module) DISCONNECTED
- 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 the DSM (Driver Seat Module). GO to Pinpoint Test T. Pinpoint Test T: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool
No
An intermittent fault is not present. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AC18 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE FCIM (Front Controls Interface Module) AND ILCM (Interior Lighting Control Module) DISABLED
- 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.
If the vehicle is not equipped with an ILCM (Interior Lighting Control Module), GO to Pinpoint Test N. Pinpoint Test N: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
If the vehicle is equipped with an ILCM (Interior Lighting Control Module), GO to AC19.
No
INSTALL the removed fuse.
If the vehicle is equipped with a Side Obstacle Detection Control Module - Left (SOD-L) and Side Obstacle Detection Control Module - Right (SOD-R), GO to AC20.
If the vehicle is not equipped with an SOD-L (Side Obstacle Detection Control Module - Left) and SOD-R (Side Obstacle Detection Control Module - Right), GO to AC22.
AC19 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM (Interior Lighting Control Module) DISCONNECTED
- Disconnect: ILCM (Interior Lighting Control Module) C2392.
- 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 the ILCM (Interior Lighting Control Module). GO to Pinpoint Test Q. Pinpoint Test Q: The Interior Lighting Control Module (ILCM) Does Not Respond To The Scan Tool
No
CONNECT the ILCM (Interior Lighting Control Module). GO to Pinpoint Test N. Pinpoint Test N: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
AC20 CHECK FOR RESTORED NETWORK COMMUNICATION WITH SOD-L (Side Obstacle Detection Control Module - Left) AND SOD-R (Side Obstacle Detection Control Module - Right) DISABLED
- 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 AC21.
No
INSTALL the removed fuse. GO to AC22.
AC21 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SOD-L (Side Obstacle Detection Control Module - Left) DISCONNECTED
- Disconnect: SOD-L (Side Obstacle Detection Control Module - Left) C4369.
- 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 the SOD-L (Side Obstacle Detection Control Module - Left). GO to Pinpoint Test R. Pinpoint Test R: The Side Obstacle Detection Control Module - Left (SOD-L) Does Not Respond To The Scan Tool
No
CONNECT the SOD-L (Side Obstacle Detection Control Module - Left). GO to Pinpoint Test S. Pinpoint Test S: The Side Obstacle Detection Control Module - Right (SOD-R) Does Not Respond To The Scan Tool
AC22 VERIFY VEHICLE EQUIPMENT - DDM (Driver Door Module)
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.
- Inspect the vehicle for a Driver Door Module (DDM).
Is the vehicle equipped with a DDM (Driver Door Module)?
Yes
GO to AC23.
No
GO to AC24.
AC23 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM (Driver Door Module) DISABLED
- 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 fuse. GO to Pinpoint Test X. Pinpoint Test X: The Driver Door Module (DDM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to AC24.
AC24 VERIFY VEHICLE EQUIPMENT - RFA (Remote Function Actuator) MODULE
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.
- Inspect the vehicle for a Remote Function Actuator (RFA) module.
Is the vehicle equipped with a RFA (Remote Function Actuator) module?
Yes
GO to AC25.
No
GO to AC26.
AC25 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RFA (Remote Function Actuator) MODULE DISABLED
- 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 K. Pinpoint Test K: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to AC26.
AC26 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPC (Instrument Panel Cluster) DISABLED
- 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 an Headlamp Control Module 2 (HCM-2), GO to AC27.
If the vehicle is not equipped with a HCM-2 (Headlamp Control Module 2), an intermittent fault is not present. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
AC27 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2 (Headlamp Control Module 2) DISABLED
- Disconnect: SJB (Smart Junction Box) Fuse 43 (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 Y. Pinpoint Test Y: The Headlamp Control Module 2 (HCM-2) Does Not Respond To The Scan Tool
No
An intermittent fault is not present. INSTALL the removed fuse. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding