Dodge Ram Truck 1500-2500-3500. Manual — part 476
*ALL DOOR LOCKS INOPERATIVE
8N - 46
POWER LOCKS - ELECTRICAL DIAGNOSTICS
DR/DH
*ALL DOOR LOCKS INOPERATIVE (CONTINUED)
For the Power Door Locks circuit diagram (Refer to 8 - ELECTRICAL/POWER LOCKS - SCHEMATICS AND DIA-
GRAMS).
For a complete wiring diagram Refer to Section 8W.
Possible Causes
DTC PRESENT
FUSE #22 OPEN
(A941) FUSE B+ CIRCUIT OPEN
INSTRUMENT CLUSTER
Diagnostic Test
1.
DTC PRESENT
Turn the ignition on.
With the DRBIII
T
, read DTC’s.
Does the DRBIII
T
display any Door Lock or Cluster related DTC’s?
Yes
>> Refer to the Table of Contents in this section.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Go To 2
2.
FUSE #22 OPEN
Test both sides of fuse #22 in the PDC.
Is there 12 volts on both sides of fuse #22?
Yes
>> Go To 3
No
>> Replace the fuse if open and retry the system. If the fuse
blows, locate and repair a short to the Instrument Cluster.
The 12 volt supply to the fuse is a bus bar in the PDC.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
DR/DH
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 47
*ALL DOOR LOCKS INOPERATIVE (CONTINUED)
3.
(A941) FUSED B+ CIRCUIT OPEN
Turn the ignition off.
Remove the instrument cluster.
Measure the voltage between the (A941) Fused B+ circuit and ground
(cavity 2 in the C1 connector to ground).
Is the voltage above 10.0 volts on the Fused B+ circuit?
Yes
>> Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Repair the Fused B+ circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
8N - 48
POWER LOCKS - ELECTRICAL DIAGNOSTICS
DR/DH
*AUTO (ROLLING) DOOR LOCKS INOPERATIVE
For the Power Door Lock circuit diagram (Refer to 8 - ELECTRICAL/POWER LOCKS - SCHEMATICS AND DIA-
GRAMS).
For a complete wiring diagram Refer to Section 8W.
Possible Causes
DOOR AJAR SWITCH STATUS INCORRECT
TPS OR VSS DTC’s
AUTO DOOR LOCKS NOT ENABLED
INSTRUMENT CLUSTER
Diagnostic Test
1.
CHECK THE DOOR AJAR SWITCH STATUS
Ensure all doors are closed.
With the DRBIII, enter
9
Electro/Mech Cluster
9
then
9
Input/Output
9
and observe all of the Door Ajar states.
Does the DRBIII display CLOSED for any door
ajar state?
Yes
>> Select the appropriate Door Ajar Circuit
Shorted: (Refer to 8 - ELECTRICAL/
LAMPS/LIGHTING - INTERIOR - DIAG-
NOSIS AND TESTING).
No
>> Go To 2
2.
ANY TPS OR VSS RELATED DTC’s
With the DRBIII read
9
Engine
9
and “Anti-Lock Brakes” DTC’s.
Does the DRBIII display any Throttle Position Sensor or Vehicle Speed Sensor related DTC’s?
Yes
>> Diagnose and repair the DTC’s. For gas engines (Refer to 9 - ENGINE - ELECTRICAL DIAGNOSTICS).
For diesel engines (Refer to 9 - ENGINE - ELECTRICAL DIAGNOSTICS). For Anti-Lock Brake (Refer to
5 - BRAKES - DIAGNOSIS AND TESTING)
No
>> Go To 3
DR/DH
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 49
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