Pinpoint Tests AG: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Res
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 (-) may cause intermittent or unreliable communication to all modules on the MS-CAN.
The following modules communicate on the MS-CAN:
- 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 (+) or MS-CAN (-) 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 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. Inspection And Verification
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. Refer to Battery, Mounting and Cables Battery Disconnect.
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AG1 CHECK THE DLC PINS FOR DAMAGE
- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 3 and 11 for damage.
- Are DLC pins 3 and 11 OK?
Yes
GO to AG2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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AG2 CHECK THE MS-CAN TERMINATION RESISTANCE
- Disconnect: Negative Battery Cable .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC 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 Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG3 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC 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 Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable .
- Ignition ON.
- Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC 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.
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AG5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB 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 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, GO to AG7.
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AG6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DCSM 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 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, GO to AG8.
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AG7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PCSM 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 modules pass the network test?
Yes
INSTALL the removed fuse. GO to Pinpoint Test P. Pinpoint Test P: The PCSM Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to AG8.
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AG8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM 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 Fuse 39 (20A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN 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 module, GO to AG10.
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AG9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO DSP 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 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 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.
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AG10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE AND FCIM 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 Fuse 15 (10A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
INSTALL the removed fuse. GO to AG11.
No
INSTALL the removed fuse. GO to AG12.
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AG11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE OR FCIM 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 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 C2403 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN 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 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 Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM, LTM, AND RETM 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 Fuse 14 (10A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
INSTALL the removed fuses. GO to AG13.
No
INSTALL the removed fuses. GO to AG14.
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AG13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM, LTM OR RETM 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 modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: APIM C3342 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: LTM C4174b .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: RETM C2949b .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the APIM disconnected, GO to Pinpoint Test AD. Pinpoint Tests AD: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
For restored operation with the LTM 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 disconnected, GO to Pinpoint Test AA. Pinpoint Tests AA: The RETM Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG14 VERIFY VEHICLE EQUIPMENT - ILCM AND/OR RHVAC 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 and/or RHVAC module?
Yes
GO to AG15.
No
GO to AG16.
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AG15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM AND RHVAC 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 Fuse 16 (15A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
INSTALL the removed fuse. GO to AG16.
No
INSTALL the removed fuse. GO to AG17.
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AG16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM OR RHVAC 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 modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: ILCM C3256 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: RHVAC Module C3198 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the ILCM 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 module disconnected, GO to Pinpoint Test AB. Pinpoint Tests AB: The RHVAC Module Does Not Respond To The Scan Tool
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM AND DSM 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 Fuse 32 (30A) .
- Disconnect: SJB Fuse 13 (5A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
INSTALL the removed fuses. GO to AG18.
No
INSTALL the removed fuses. GO to AG19.
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AG18 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM OR DSM 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 modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: DDM C501a .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: DSM C341d .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the DDM 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 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 Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG19 VERIFY VEHICLE EQUIPMENT - RFA MODULE
- Inspect the vehicle for a Remote Function Actuator (RFA) module.
- Is the vehicle equipped with an RFA module?
Yes
GO to AG20.
No
GO to AG21.
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AG20 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RFA 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 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 modules pass the network test?
Yes
INSTALL the removed fuses. GO to Pinpoint Test AC. Pinpoint Tests AC: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to AG21.
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AG21 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPC 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 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 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 and/or SOD-L and SOD-R, an intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG22 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2, SOD-L AND SOD-R 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 Fuse 35 (10A) .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN 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 Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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AG23 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2, SOD-L OR SOD-R 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 modules pass the network test. Skip to the end once network operation is restored.
- Disconnect: HCM-2 Inline C913 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: SOD-L C4230 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Disconnect: SOD-R C4229 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other MS-CAN modules pass the network test?
Yes
CONNECT all modules.
For restored operation with the HCM-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 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 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
No
CONNECT all modules. An intermittent fault is not present. GO to Pinpoint Test AH. Pinpoint Tests AH: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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