RAM 1500 Van V8-5.2L CNG VIN T (1999)
SYMPTOM
* ALL DOORS FAILING TO LOCK FROM ONE SWITCH
TEST NOTE
This symptom is diagnosed using the test DOOR LOCK SWITCH FAILURE.
WHEN MONITORED
Continuously
SET CONDITION
-
The CTM monitors the door lock switch circuits. If the input is pulled for more than 30 seconds, it assumes that the switch is defective.
-
If the door lock switch is active for more than 30 seconds.
POSSIBLE CAUSES
-
Fused B (+) circuit open
-
Door lock switch output (lock) circuit short to battery
-
Door lock switch output (lock) circuit open
-
Door lock switch defective - open
-
Left door lock switch defective - shorted
-
Right door lock switch defective - shorted
-
CTM defective - door lock switch output shorted
-
CTM defective - door lock switch output open
All Doors Failing to Unlock From Any Switch
SYMPTOM
* ALL DOORS FAILING TO UNLOCK FROM ANY SWITCH
POSSIBLE CAUSES
-
Door lock driver circuit short to voltage
-
Door unlock driver circuit short to ground
-
CTM defective - unlock function
All Doors Failing to Unlock From One Switch
SYMPTOM
* ALL DOORS FAILING TO UNLOCK FROM ONE SWITCH
TEST NOTE
This symptom is diagnosed using the test DOOR UNLOCK SWITCH FAILURE
WHEN MONITORED
Continuously
SET CONDITION
If the door unlock switch is active for more than 30 seconds.
POSSIBLE CAUSES
-
Fused B (+) circuit open
-
Door lock switch output (unlock) circuit short to battery
-
Door lock switch output (unlock) circuit open
-
Left door lock switch defective - shorted
-
Door lock switch defective - open
-
Right door lock switch defective - shorted
-
CTM defective - Door lock switch output open
-
CTM defective - Door lock switch output shorted
Auxiliary Doors Fail to Lock
SYMPTOM
* AUXILIARY DOORS FAIL TO LOCK
POSSIBLE CAUSES
-
Auxiliary door switch sense circuit resistance measurement
-
Rear auxiliary door switch defective - shorted
-
Side auxiliary door switch defective - shorted
-
CTM defective - Auxiliary door switch sense function shorted
