Pinpoint Test W: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Respond
Communications Network
Pinpoint Tests
Pinpoint Test W: 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) uses an unshielded twisted pair cable, (HS-CAN +) and (HS-CAN -).
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
- Data Link Connector (DLC)
PINPOINT TEST W: INTERMITTENT NO HS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test. Inspection and Verification
NOTE: Various network DTCs set while disabling modules in this test procedure which need to be cleared after the diagnostic procedure is completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.
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W1 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 W2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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W2 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 W3.
No
CONNECT the negative battery cable. GO to Pinpoint Test X. Pinpoint Test X: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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W3 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 W4.
No
CONNECT the negative battery cable. GO to Pinpoint Test X. Pinpoint Test X: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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W4 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 W5.
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W5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED
- Disconnect: Battery Junction Box (BJB) Fuses 35 (40A) and 75 (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 A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to W6.
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W6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED
- Disconnect: BJB Fuses 52 (10A), 68 (60A) and 69 (60A).
- 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 B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to W7.
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W7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TCM DISABLED
- Disconnect: BJB Fuse 26 (15A) and 54 (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 G. Pinpoint Test G: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to W8.
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W8 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 W9.
No
GO to W10.
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W9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE DISABLED
- Disconnect: BJB Fuse 20 (20A) 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 E. Pinpoint Test E: The 4X4 Control Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to W10.
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W10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED
- Disconnect: Smart Junction Box (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 W11.
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W11 VERIFY VEHICLE EQUIPMENT - VDM
- Inspect the vehicle for a VDM.
- Is the vehicle equipped with a VDM?
Yes
GO to W12.
No
GO to W13.
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W12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE VDM DISABLED
- Disconnect: BJB Fuse 53 (10A) and 48 (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 fuses. GO to Pinpoint Test F. Pinpoint Test F: The Vehicle Dynamics Module (VDM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to W13.
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W13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISABLED
- 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 D. Pinpoint Test D: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
No
If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), INSTALL the removed fuse. GO to W14.
If the vehicle is not equipped with an APIM, INSTALL the removed fuse. An intermittent fault is not present. GO to Pinpoint Test X. Pinpoint Test X: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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W14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISCONNECTED
- Disconnect: APIM C3342.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
- Do all other modules pass the network test?
Yes
GO to Pinpoint Test S. Pinpoint Test S: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
No
An intermittent fault is not present. GO to Pinpoint Test X. Pinpoint Test X: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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