Pinpoint Test W: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Respo
Communications Network
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 (Medium Speed Controller Area Network) 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.
W1 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 W2.
No
REPAIR the DLC (Data Link Connector) as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
W2 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 W3.
No
GO to Pinpoint Test X. Pinpoint Test X: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding
W3 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 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
W4 CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO VOLTAGE
- 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 short to voltage. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to W5.
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 (Body Control Module) 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 (Dual Climate Controlled Seat Module), INSTALL the removed fuses. GO to W6.
If the vehicle is not equipped with a DCSM (Dual Climate Controlled Seat Module), INSTALL the removed fuses. GO to W7.
W6 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: BJB (Battery Junction Box) 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.
W7 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: BCM (Body Control Module) 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 (Audio Control Module), 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 (Driver Seat Module), INSTALL the removed fuse. GO to W8.
If the vehicle is not equipped with a DSM (Driver Seat Module), INSTALL the removed fuse. GO to W9.
W8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 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 9 (30A) BCM (Body Control Module) 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 (Circuit Deactivation Ignition Module), INSTALL the removed fuse. GO to W9.
If the vehicle is not equipped with a CDIM (Circuit Deactivation Ignition Module), INSTALL the removed fuse. GO to W10.
W9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE CDIM (Circuit Deactivation Ignition 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 (Body Control Module) 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.
W10 VERIFY VEHICLE EQUIPMENT - GPSM (Global Positioning System Module)
- Verify whether the vehicle is equipped with a GPSM (Global Positioning System Module).
Is the vehicle equipped with a GPSM (Global Positioning System Module) ?
Yes
GO to W11.
No
GO to W12.
W11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE GPSM (Global Positioning System 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 (Body Control Module) 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.
W12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TPM (Tire Pressure Monitor 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 (Body Control Module) 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 (Satellite Digital Audio Receiver System) module, INSTALL the removed fuses. GO to W13.
If the vehicle is not equipped with a SDARS (Satellite Digital Audio Receiver System) module, INSTALL the removed fuses. GO to W14.
W13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SDARS (Satellite Digital Audio Receiver System) 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 (Body Control Module) 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
W14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM (Accessory Protocol 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: BCM (Body Control Module) 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.
W15 CHECK FOR CORRECT BCM (Body Control Module) OPERATION
- Disconnect all the BCM (Body Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM (Body Control Module) 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.