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




Communications Network


Pinpoint Tests

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

Normal Operation

An open circuit HS-CAN (+) or circuit HS-CAN (-) may cause intermittent or unreliable communication to all modules on the HS-CAN.

The following modules communicate on the HS-CAN:

- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Cruise-Control Module (C-CM) (if equipped)
- Head Up Display (HUD) module (if equipped)
- Instrument Panel Cluster (IPC) (gateway module)
- Occupant Classification System Module (OCSM)
- Parking Aid Module (PAM) (if equipped)
- PCM
- Power Steering Control Module (PSCM)
- Remote Function Actuator (RFA) module (if equipped)
- Restraints Control Module (RCM)

In the event that either the HS-CAN (+) or HS-CAN (-) circuit 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 AA: 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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AA1 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 AA2.

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

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AA2 CHECK THE HS-CAN TERMINATION RESISTANCE


- Ignition OFF.
- 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 AA3.

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

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AA3 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 negative battery cable. GO to AA4.

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

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AA4 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 AA5.

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AA5 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 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: Battery Junction Box (BJB) Fuses 23 (7.5A), 37 (10A) and 47 (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 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 AA6.

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AA6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE AND PSCM 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 12 (20A) .
- Disconnect: Smart Junction Box (SJB) Fuse 34 (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 AA7.

No
INSTALL the removed fuses. GO to AA8.

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AA7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PSCM 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: Power Steering Control Module (PSCM) C1463a .
- 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 PSCM. GO to Pinpoint Test D. Pinpoint Test D: The Power Steering Control Module (PSCM) Does Not Respond To The Scan Tool

No
CONNECT the PSCM. GO to Pinpoint Test B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

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AA8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPC AND HUD 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 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. If the vehicle is equipped with a Head Up Display (HUD) module,GO to AA9.

If the vehicle is not equipped with a HUD module, GO to Pinpoint Test C. Pinpoint Test C: The Instrument Panel Cluster (IPC) Does Not Respond To The Scan Tool

No
INSTALL the removed fuses. GO to AA10.

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AA9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HUD 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: Head Up Display (HUD) Module C2395 .
- 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 HUD module. GO to Pinpoint Test G. Pinpoint Test G: The Head Up Display (HUD) Module Does Not Respond To The Scan Tool

No
CONNECT the HUD module. GO to Pinpoint Test C. Pinpoint Test C: The Instrument Panel Cluster (IPC) Does Not Respond To The Scan Tool

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AA10 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 32 (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 AA11.

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AA11 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 Communicate With the Scan Tool

No
INSTALL the removed fuse.

If the vehicle is equipped with a 4X4 control module and/or Cruise-Control Module (C-CM), GO to AA12.

If the vehicle not is equipped with a 4X4 control module or C-CM, GO to AA14.

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AA12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE AND PAM 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 11 (10A) 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. If the vehicle is equipped with only a 4X4 control module, GO to Pinpoint Test H. Pinpoint Test H: The 4X4 Control Module Does Not Respond To The Scan Tool

If the vehicle is equipped with only a Parking Aid Module (PAM), GO to Pinpoint Test J. Pinpoint Test J: The Parking Aid Module (PAM) Does Not Respond To The Scan Tool

If the vehicle is equipped with both a 4X4 control module and a PAM, GO to AA13.

No
INSTALL the removed fuses. GO to AA14.

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AA13 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 C281 .
- 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 H. Pinpoint Test H: The 4X4 Control Module Does Not Respond To The Scan Tool

No
CONNECT the 4X4 control module. GO to Pinpoint Test J. Pinpoint Test J: The Parking Aid Module (PAM) Does Not Respond To The Scan Tool

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AA14 VERIFY VEHICLE EQUIPMENT - C-CM


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.

- Inspect the vehicle for a Cruise-Control Module (C-CM).
- Is the vehicle equipped with a C-CM?

Yes
GO to AA15.

No
GO to AA16.

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AA15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE C-CM 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 13 (5A) and 36 (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 fuses. GO to Pinpoint Test I. Pinpoint Test I: The Cruise-Control Module (C-CM) Does Not Communicate With the Scan Tool

No
INSTALL the removed fuses. GO to AA16.

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AA16 VERIFY VEHICLE EQUIPMENT - APIM


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.

- Inspect the vehicle for an Accessory Protocol Interface Module (APIM).
- Is the vehicle equipped with an APIM?

Yes
GO to AA17.

No
GO to AA18.

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AA17 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 14 (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 L. Pinpoint Test L: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

No
INSTALL the removed fuse. GO to AA18.

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AA18 VERIFY VEHICLE EQUIPMENT - RFA MODULE


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.

- Inspect the vehicle for a Remote Function Actuator (RFA) module.
- Is the vehicle equipped with an RFA module?

Yes
GO to AA19.

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

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AA19 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 modules pass the network test?

Yes
INSTALL the removed fuses. GO to Pinpoint Test K. Pinpoint Test K: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool

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

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