Pinpoint Test AC: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Resp
Communications Network
Pinpoint Tests
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 (-) 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)
- 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)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
PINPOINT TEST AC: 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.
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AC1 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 AC2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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AC2 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 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
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AC3 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 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
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AC4 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.
- 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.
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AC5 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 AC6.
If the vehicle is not equipped with a DCSM, GO to AC7.
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AC6 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 22 (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. GO to AC7.
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AC7 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 AC8.
If the vehicle is not equipped with an audio DSP module, GO to AC9.
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AC8 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 38 (20A) and 40 (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 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 AC9.
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AC9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC 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 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 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, FDIM and/or GPSM, GO to AC10.
If the vehicle is not equipped with an APIM, FDIM and/or GPSM, GO to AC16.
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AC10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM, FDIM AND GPSM 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 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 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, GO to AC12.
No
INSTALL the removed fuse. GO to AC12.
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AC11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM 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: APIM C3342 .
- 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 the APIM. GO to Pinpoint Test Z. Pinpoint Test Z: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
No
CONNECT the APIM. GO to AC12.
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AC12 VERIFY VEHICLE EQUIPMENT - FDIM
- Inspect the vehicle for a Front Display Interface Module (FDIM).
- Is the vehicle equipped with an FDIM?
Yes
GO to AC13.
No
GO to AC14.
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AC13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE FDIM 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: FDIM C2123 .
- 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 the FDIM. 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. GO to AC14.
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AC14 VERIFY VEHICLE EQUIPMENT - GPSM
- Inspect the vehicle for a Global Positioning System Module (GPSM).
- Is the vehicle equipped with a GPSM?
Yes
GO to AC15.
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
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AC15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE GPSM 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: GPSM C2300 .
- 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 the GPSM. GO to Pinpoint Test P. Pinpoint Test P: The Global Positioning System Module (GPSM) 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
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AC16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE FCIM AND ILCM 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.
If the vehicle is equipped with an ILCM, GO to AC17.
If the vehicle is not equipped with an ILCM, GO to Pinpoint Test N. Pinpoint Test N: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse.
If the vehicle is equipped with a Driver Door Module (DDM) and/or Driver Seat Module (DSM), GO to AC18.
If the vehicle is not equipped with a DDM and/or DSM, GO to AC20.
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AC17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ILCM 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: ILCM C2411 .
- 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 the ILCM. 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. GO to Pinpoint Test N. Pinpoint Test N: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
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AC18 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) and 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.
If the vehicle is equipped with only a DDM, GO to Pinpoint Test X. Pinpoint Test X: The Driver Door Module (DDM) Does Not Respond To The Scan Tool
If the vehicle is equipped with only a DSM, GO to Pinpoint Test T. Pinpoint Test T: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool
If the vehicle is equipped with both a DDM and DSM, GO to AC19.
No
INSTALL the removed fuses. GO to AC20.
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AC19 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 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: 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 the DSM. GO to Pinpoint Test T. Pinpoint Test T: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool
No
CONNECT the DSM. GO to Pinpoint Test X. Pinpoint Test X: The Driver Door Module (DDM) Does Not Respond To The Scan Tool
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AC20 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 AC21.
No
GO to AC22.
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AC21 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 Y. Pinpoint Test Y: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to AC22.
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AC22 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 fuse.
If the vehicle is equipped with a Headlamp Control Module 2 (HCM-2), GO to AC23.
If the vehicle is not equipped with an HCM-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
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AC23 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM-2 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 31 (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 Pinpoint Test R. Pinpoint Test R: The Headlamp Control Module 2 (HCM-2) Does Not Respond To The Scan Tool
No
An intermittent fault is not present. INSTALL the removed fuses. GO to Pinpoint Test AD. Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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