All Door Unlock Circuit Low
Circuit Description
The door locking/unlocking, by remote keyless entry (RKE) or driver/passenger
door lock switches, is controlled through the body control module (BCM).
When an all doors unlock has been requested, the BCM switches circuit 194,
to battery voltage. This energizes the other door lock relay which supplies power
to all passenger door lock motors. Grounding is achieved through the closed contacts
of the unlock relay.
The lock/unlock power application is limited by the BCM to 0.375 seconds
to protect the lock motors.
Conditions for Setting the DTC
| • | All door unlock is requested. |
| • | Circuit 194 is shorted to ground. |
Diagnostic Aids
| • | When a shorted-to-ground condition exists in circuit 194 and the
BCM has been requested to activate the door lock relay, the BCM will attempt to switch
circuit 194 to battery voltage. High current flow will result and the BCM output
will go into a protective state. The BCM output will not allow itself to be activated
for as much as 3 minutes. |
| • | Inspect the wiring harness for damage. Check for broken or chafed insulation. |
| • | If a fault is suspected to be intermittent, wiggling the harness wiring
may help in locating the fault. |
