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Pinpoint Test R: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittently




Communications Network

Pinpoint Tests

Pinpoint Test R: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittently Established

Normal Operation

An open circuit VDB04 (WH/BU) (HS-CAN +) or circuit VDB05 (WH) (HS-CAN -) may cause intermittent or unreliable communication to all modules on the HS-CAN. The following modules communicate on the HS-CAN:

- PCM
- Accessory Protocol Interface Module (APIM)
- Steering Effort Control Module (SECM)
- ABS module
- Restraints Control Module (RCM)
- 4X4 control module
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)

In the event that 1 of the 2 network circuits (HS-CAN + or HS-CAN -) 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 R: INTERMITTENT NO HS-CAN COMMUNICATION, COMMUNICATION CAN BE INTERMITTENTLY ESTABLISHED

NOTE: Various modules will set network DTCs during this test procedure. Clear the DTCs from all modules after the diagnostic procedure is complete.

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R1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE


- Ignition OFF.
- Disconnect the scan tool cable from the DLC.
- Inspect DLC pins 6 and 14 for damage.




- Are DLC pins 6 and 14 OK?

Yes
GO to R2.

No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.

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R2 CHECK THE HS-CAN TERMINATION RESISTANCE


- Ignition OFF.
- NOTE: Failure to disconnect the battery will result in false resistance readings.
- Disconnect the battery ground cable.
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance between 54 and 66 ohms?

Yes
GO to R3.

No
Go To Pinpoint Test Q. Pinpoint Test Q: No Power To The Scan Tool

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R3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND


- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
GO to R4.

No
Go To Pinpoint Test Q. Pinpoint Test Q: No Power To The Scan Tool

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R4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE


- Connect the battery ground cable.
- Ignition ON.
- Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.




- Is the voltage greater than 6 volts?

Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
GO to R5.

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R5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED


NOTE: An integrated diagnostic system (IDS) session must be established prior to disabling the PCM in this test step. If the PCM has failed communication during multiple attempts to identify the vehicle, first identify the vehicle manually by entering a PCM part number, calibration number or tear tag when prompted by IDS.

NOTE: When a vehicle is manually identified by a PCM part number, calibration number or tear tag, the IDS will not automatically run a network test. The network test must be manually selected and run.

NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: Battery Junction Box (BJB) Fuses 23 (10A), 47 (15A) and 39 (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 A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to R6.

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R6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: Battery Junction Box (BJB) Fuse 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. Go To Pinpoint Test B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

No
INSTALL the removed fuse. GO to R7.

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R7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE STEERING EFFORT CONTROL MODULE (SECM) DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: SJB Fuses 13 (5A) and 35 (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 G. Pinpoint Test G: The Steering Effort Control Module (SECM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to R8.

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R8 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Inspect the vehicle for 4X4.
- Is the vehicle equipped with 4X4?

Yes
GO to R9.

No
GO to R10.

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R9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: SJB Fuses 34 (5A) and 11 (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 D. Pinpoint Test D: The 4X4 Control Module Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to R10.

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R10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE INSTRUMENT CLUSTER (IC) DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: SJB Fuse 26 (10A) and 29 (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 C. Pinpoint Test C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to R11.

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R11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RESTRAINTS CONTROL MODULE (RCM) DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: SJB Fuse 33 (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. Go To Pinpoint Test E. Pinpoint Test E: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuse. GO to R12.

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R12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DISABLED


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Disconnect: SJB Fuse 46 (7.5A).
- 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 fuse. Go To Pinpoint Test F. Pinpoint Test F: The Occupant Classification System Module (OCSM) Does Not Communicate With The Scan Tool

No
GO to R13.

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R13 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM)


NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.

- Inspect the vehicle for an APIM.
- Is the vehicle equipped with an APIM?

Yes
GO to R14.

No
INSTALL the removed fuse. An intermittent fault is not present. Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

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R14 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 will revert back to the prior run network test results.

- Disconnect: SJB Fuse 3 (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 O. Pinpoint Test O: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuse. An intermittent fault is not present. Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

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