Pinpoint Test W: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Respo
Communications Network
Pinpoint Tests
Pinpoint Test W: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
In the event that either Medium Speed Controller Area Network (MS-CAN) circuit becomes open to any module on the network, unreliable network communication to all modules on the network may result.
This pinpoint test is intended to diagnose the following:
- Accessory Protocol Interface Module (APIM) (if equipped)
- Audio Control Module (ACM)
- Global Positioning System Module (GPSM) (if equipped)
- Circuit Deactivation Ignition Module (CDIM) (diesel engine only, if equipped)
- Dual Climate Controlled Seat Module (DCSM) (if equipped)
- Driver Seat Module (DSM)
- HVAC module
- Tire Pressure Monitor Module (TPM)
- Satellite Digital Audio Receiver System (SDARS) module (if equipped)
- Body Control Module (BCM)
PINPOINT TEST W: INTERMITTENT NO MS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
NOTE: Various modules set network DTCs during this test procedure. Clear DTCs from all modules 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 / Connect.
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W1 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 W2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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W2 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 W3.
No
GO to Pinpoint Test X. Pinpoint Test X: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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W3 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 5,000 ohms?
Yes
CONNECT the negative battery cable. GO to W4.
No
GO to Pinpoint Test X. Pinpoint Test X: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
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W4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
- 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 short to voltage. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to W5.
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W5 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: BCM Fuse 46 (10A).
- 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 J. Pinpoint Test J: The HVAC Module Does Not Respond To The Scan Tool
No
If the vehicle is equipped with a , DCSM INSTALL the removed fuses. GO to W6.
If the vehicle is not equipped with a , DCSM INSTALL the removed fuses. GO to W7.
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W6 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: BJB Fuse 85 (30A) .
- 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 fuse. GO to Pinpoint Test L. Pinpoint Test L: The Dual Climate Controlled Seat Module (DCSM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to W7.
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W7 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: BCM Fuses 29 (20A) and 38 (10A).
- 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 fuse. For ACM, GO to Pinpoint Test K. Pinpoint Test K: The Audio Control Module (ACM) Does Not Respond To The Scan Tool
No
If the vehicle is equipped with a DSM, INSTALL the removed fuse. GO to W8.
If the vehicle is not equipped with a DSM, INSTALL the removed fuse. GO to W9.
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W8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 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 9 (30A) BCM Fuse 6 (5A) .
- 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 I. Pinpoint Test I: The Driver Seat Module (DSM) Does Not Communicate With the Scan Tool
No
If the vehicle is equipped with a CDIM, INSTALL the removed fuse. GO to W9.
If the vehicle is not equipped with a CDIM, INSTALL the removed fuse. GO to W10.
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W9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE CDIM 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: BCM Fuse 28 (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 fuse. GO to Pinpoint Test N. Pinpoint Test N: The Circuit Deactivation Ignition Module (CDIM) Does Not Communicate With the Scan Tool
No
INSTALL the removed fuse. GO to W10.
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W10 VERIFY VEHICLE EQUIPMENT - GPSM
- Verify whether the vehicle is equipped with a GPSM.
- Is the vehicle equipped with a GPSM?
Yes
GO to W11.
No
GO to W12.
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W11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 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: BCM Fuse 29 (20A) .
- 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 fuse. GO to Pinpoint Test P. Pinpoint Test P: The Global Positioning System Module (GPSM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to W12.
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W12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TPM 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: BCM Fuse 24 (10A) .
- 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 T. Pinpoint Test T: The Tire Pressure Monitor Module (TPM) Does Not Respond To The Scan Tool
No
If the vehicle is equipped with a SDARS module, INSTALL the removed fuses. GO to W13.
If the vehicle is not equipped with a SDARS module, INSTALL the removed fuses. GO to W14.
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W13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SDARS 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: BCM Fuse 24 (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 fuse. GO to Pinpoint Test M. Pinpoint Test M: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to W14
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W14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM 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: BCM Fuse 29 (20A).
- 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 fuse. GO to Pinpoint Test Q. Pinpoint Test Q: The Transfer Case Control Module (TCCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to W15.
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W15 CHECK FOR CORRECT BCM OPERATION
- Disconnect all the BCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
GO to Pinpoint Test H Pinpoint Test H: The Body Control Module (BCM) Does Not Respond To The Scan Tool
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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