Pinpoint Test V: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Respond
Communications Network
Pinpoint Tests
Pinpoint Test V: 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. 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.
The following modules communicate with the scan tool using the HS-CAN:
- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Headlamp Control Module (HCM) (if equipped)
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- PCM
- Restraints Control Module (RCM)
- Steering Angle Sensor Module (SASM) (if equipped)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Data Link Connector (DLC)
PINPOINT TEST V: 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.
-------------------------------------------------
V1 CHECK THE 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 V2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
V2 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 V3.
No
CONNECT the negative battery cable. GO to Pinpoint Test W. Pinpoint Test W: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
-------------------------------------------------
V3 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 V4.
No
CONNECT the negative battery cable. GO to Pinpoint Test W. Pinpoint Test W: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
-------------------------------------------------
V4 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 in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to V5.
-------------------------------------------------
V5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED
- Disconnect: Battery Junction Box (BJB) Fuses 21 (7.5A), 30 (15A) and 49 (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 V6.
-------------------------------------------------
V6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED
- Disconnect: BJB Fuse 50 (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 V7.
-------------------------------------------------
V7 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 V8.
No
GO to V9.
-------------------------------------------------
V8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE DISABLED
- Disconnect: BJB Fuses 11 (10A) and 35 (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 D. Pinpoint Test D: The 4X4 Control Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to V9.
-------------------------------------------------
V9 VERIFY VEHICLE EQUIPMENT - APIM
- Inspect the vehicle for an APIM.
- Is the vehicle equipped with an APIM?
Yes
GO to V10.
No
GO to V11.
-------------------------------------------------
V10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISABLED
- 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 S. Pinpoint Test S: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to V11.
-------------------------------------------------
V11 VERIFY VEHICLE EQUIPMENT - HCM
- Inspect the vehicle for an HCM.
- Is the vehicle equipped with an HCM?
Yes
GO to V12.
No
GO to V13.
-------------------------------------------------
V12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HCM DISABLED
- Disconnect: SJB Fuse 51 (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 Headlamp Control Module (HCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to V13.
-------------------------------------------------
V13 VERIFY VEHICLE EQUIPMENT - SASM
- Inspect the vehicle for an SASM.
- Is the vehicle equipped with an SASM?
Yes
GO to V14.
No
GO to V15.
-------------------------------------------------
V14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SASM DISABLED
- Disconnect: 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 fuse. GO to Pinpoint Test G. Pinpoint Test G: The Steering Angle Sensor Module (SASM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to V11.
-------------------------------------------------
V15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM AND THE OCSM DISABLED
- 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 V16.
No
INSTALL the removed fuse. GO to V17.
-------------------------------------------------
V16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISCONNECTED
- Disconnect: RCM C310b.
- 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 RCM. GO to Pinpoint Test C. Pinpoint Test C: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
No
CONNECT the RCM. GO to Pinpoint Test E. Pinpoint Test E: The Occupant Classification System Module (OCSM) Does Not Respond To The Scan Tool
-------------------------------------------------
V17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE INSTRUMENT CLUSTER (IC) DISABLED
- 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 H. Pinpoint Test H: The Instrument Cluster (IC) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. An intermittent fault is not present. GO to Pinpoint Test W. Pinpoint Test W: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
-------------------------------------------------