Pinpoint Test H: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Respond
Communications Network
Pinpoint Tests
Pinpoint Test H: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
The High Speed Controller Area Network (HS-CAN) is used for communication between the PCM, the Smart Junction Box (SJB), the ABS module, the Restraints Control Module (RCM), the 4X4 control module (if equipped) and the Instrument Cluster (IC).
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 H: INTERMITTENT NO HS-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.
-------------------------------------------------
H1 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 H2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
H2 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 H3.
No
GO to Pinpoint Test I. Pinpoint Test I: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
-------------------------------------------------
H3 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 H4.
No
CONNECT the negative battery cable. GO to Pinpoint Test I. Pinpoint Test I: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
-------------------------------------------------
H4 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 H5.
-------------------------------------------------
H5 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 the 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 21 (10A) and 39 (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 H6.
-------------------------------------------------
H6 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 reverts back to the prior run network test results.
- Disconnect: BJB Fuse 33 (40A).
- Disconnect: Smart Junction Box (SJB) Fuse 20 (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 ABS Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to H7.
-------------------------------------------------
H7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB 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: Smart Junction Box (SJB) Fuse 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 fuse. GO to Pinpoint Test D. Pinpoint Test D: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to H8.
-------------------------------------------------
H8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB DISCONNECTED
- Disconnect: SJB C2280d.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
- Do all modules pass the network test?
Yes
CONNECT the SJB. GO to Pinpoint Test D. Pinpoint Test D: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool
No
CONNECT the SJB. GO to H9.
-------------------------------------------------
H9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC 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: IC C220b.
- 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 IC. GO to Pinpoint Test E. Pinpoint Test E: The Instrument Cluster (IC) Does Not Respond To The Scan Tool
No
CONNECT the IC.
If the vehicle is equipped with a 4X4 control module, GO to H10.
If the vehicle is not equipped with a 4X4 control module, GO to H11.
-------------------------------------------------
H10 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 C281a.
- 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 F. Pinpoint Test F: The 4X4 Control Module Does Not Respond To The Scan Tool
No
CONNECT the 4X4 control module. GO to H11.
-------------------------------------------------
H11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM AND 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 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 fuse. GO to H12.
No
INSTALL the removed fuse. An intermittent fault is not present. GO to Pinpoint Test A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
-------------------------------------------------
H12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCSM 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: Occupant Classification System Module (OCSM) C3159.
- 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 OCSM. GO to Pinpoint Test B. Pinpoint Test B: The Occupant Classification System Module (OCSM) Does Not Communicate With the Scan Tool
No
CONNECT the OCSM. GO to Pinpoint Test C. Pinpoint Test C: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
-------------------------------------------------