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DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.8) [(US)]

DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.8) [(US)]

SM2566472


id1002x1004600

Caution
• Perform the following malfunction diagnosis only when it is diagnosed with a short to ground by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(US)].)



System Wiring Diagram

am3zzw00027511



Determination Procedure

Caution
• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.
• When inspecting the connector, touch it with a paper clip or similar thin pin without directly inserting a tester probe into the terminal.

Step

Inspection

Action

1
INSPECT CAN LINE IN BODY CONTROL MODULE (BCM) FOR SHORT TO GROUND
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the connector 3 which has body control module (BCM) terminals 3U and 3W.
• Inspect for continuity at the following terminals:
― Between body control module (BCM) terminal 3U (wiring harness side) and body ground
― Between body control module (BCM) terminal 3V (wiring harness side) and body ground
• Is there continuity?
Yes
Go to the next step.
No
Replace the body control module (BCM) because there is a short to ground in the body control module (BCM).
2
INSPECT CAN LINE IN TELEMATICS COMMUNICATION UNIT FOR SHORT TO GROUND
• Disconnect the telematics communication unit connector.
• Inspect for continuity at the following terminals:
― Between telematics communication unit terminal 1Q (wiring harness side) and body ground
― Between telematics communication unit terminal 1S (wiring harness side) and body ground
• Is there continuity?
Yes
Repair or replace the wiring harness between the body control module (BCM) and telematics communication unit because the wiring harness is shorted to ground.
No
Replace the telematics communication unit because there is a short to ground in the telematics communication unit.