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DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.2) [(US)]

DETERMINING SHORT TO GROUND LOCATION (CAN-BUS No.2) [(US)]

SM2566448


id1002x1002200

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

am3zzw00027505



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 2 which has body control module (BCM) terminals 2H and 2F.
• Inspect for continuity at the following terminals:
― Between body control module (BCM) terminal 2H (wiring harness side) and body ground
― Between body control module (BCM) terminal 2F (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 DSC HU/CM FOR SHORT TO GROUND
• Disconnect the DSC HU/CM connector.
• Inspect for continuity at the following terminals:
― Between DSC HU/CM terminal AQ (wiring harness side) and body ground
― Between DSC HU/CM terminal AN (wiring harness side) and body ground
• Is there continuity?
Yes
Go to the next step.
No
Replace the DSC HU/CM because there is a short to ground in the DSC HU/CM.
3
INSPECT CAN LINE IN PCM FOR SHORT TO GROUND
• Disconnect the PCM connector.
• Inspect for continuity at the following terminals:
― Between PCM terminal 2M (wiring harness side) and body ground
― Between PCM terminal 2N (wiring harness side) and body ground
• Is there continuity?
Yes
Repair or replace the wiring harness between the PCM and DSC HU/CM and body control module (BCM) because the wiring harness is shorted to ground.
No
Replace the PCM because there is a short to ground in the PCM.