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




Communications Network

Pinpoint Tests

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

Normal Operation

The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable. 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.

- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Air Conditioning Compressor Module (ACCM) (hybrid)
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- PCM
- Parking Aid Module (PAM) (if equipped)
- Power Steering Control Module (PSCM)
- Restraints Control Module (RCM)
- Battery Control Module (BCM) (hybrid)
- Transmission Control Module (TCM) (hybrid)

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors




PINPOINT TEST S: INTERMITTENT NO HS-CAN COMMUNICATION, COMMUNICATION CAN BE INTERMITTENTLY ESTABLISHED

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

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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S1 CHECK THE DLC PINS FOR DAMAGE



- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 6 and 14 for damage.




- Are DLC pins 6 and 14 OK?

Yes
GO to S2.

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

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S2 CHECK THE HS-CAN TERMINATION RESISTANCE



- Disconnect: Negative Battery 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 S3.

No
GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

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S3 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
CONNECT the battery negative cable. GO to S4.

No
GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

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S4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE



- 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 S5.

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S5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISCONNECTED



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 does 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 reverts back to the prior run network test results.

- Disconnect: PCM C175b .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other modules pass the network test?

Yes
CONNECT the PCM. GO to Pinpoint Test A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool

No
CONNECT the PCM.

For hybrid, GO to S6.

For non-hybrid, GO to S7.

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S6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE BCM 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 Fuses 26 (20A) and 8 (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 I. Pinpoint Test I: The Battery Control Module (BCM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to S7.

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S7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PSCM, THE 4X4 CONTROL MODULE (IF EQUIPPED) AND THE PAM (IF EQUIPPED) 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 modules pass the network test?

Yes
INSTALL the removed fuse.

For vehicles equipped with an PSCM only, GO to Pinpoint Test G. Pinpoint Test G: The Power Steering Control Module (PSCM) Does Not Respond To The Scan Tool

For vehicles also equipped with a 4X4 control module and/or a PAM, GO to S8.

No
INSTALL the removed fuse. GO to S11.

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S8 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE



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

Yes
GO to S9.

No
GO to S10.

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S9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL 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: 4X4 Control Module C3184 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other modules pass the network test?

Yes
CONNECT the 4X4 control module. GO to Pinpoint Test D. Pinpoint Test D: The 4X4 Control Module Does Not Respond To The Scan Tool

No
CONNECT the 4X4 control module. GO to S10.

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S10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PAM 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: PAM C4014 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other modules pass the network test?

Yes
CONNECT the PAM. GO to Pinpoint Test J. Pinpoint Test J: The Parking Aid Module (PAM) Does Not Respond To The Scan Tool

No
CONNECT the PAM. GO to S11.

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S11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM 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 31 (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 S12.

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S12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCSM 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 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 Respond To The Scan Tool

No
INSTALL the removed fuse. GO to S13.

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S13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC 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 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.

If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), GO to S14.

If the vehicle is not equipped with an APIM, GO to S15.

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S14 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: 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 R. Pinpoint Test R: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuse. GO to S15.

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S15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE AND THE ACCM 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 47 (10A) and SJB Fuse 27 (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.

For non-hybrid, GO to Pinpoint Test B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

For hybrid, GO to S16.

No
INSTALL the removed fuses. GO to S17.

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S16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS 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: ABS Module C1155 .
- Enter the following diagnostic mode on the scan tool: Network Test .
- Repeat the network test.
- Do all other modules pass the network test?

Yes
CONNECT the ABS module. GO to Pinpoint Test B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

No
CONNECT the ABS module.

For non-hybrid, an intermittent fault is not present. GO to Pinpoint Test K. Pinpoint Test K: The Air Conditioning Compressor Module (ACCM) Does Not Respond To The Scan Tool

For hybrid, GO to S17.

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S17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TCM 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 Fuses 5 (10A) and 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 H. Pinpoint Test H: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. An intermittent fault is not present. GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

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