Dodge Ram Truck 1500-2500-3500. Manual — part 475
PASSENGER DOOR LOCK SWITCH INPUT CIRCUIT STUCK (CONTINUED)
2.
DOOR LOCK SWITCH STUCK
Disconnect the Passenger Door Lock Switch connector.
With the DRBIII
T
in sensors, read the PASS DOOR LOCK SW MUX
circuit.
Is the voltage above 4.6 volts?
Yes
>> Replace the Passenger Door Lock Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Go To 3
3.
(G160) PASSENGER DOOR LOCK SWITCH MUX CIRCUIT SHORTED
Turn the ignition off.
Disconnect the Instrument Cluster C4 connector.
Measure the resistance between the (G160) Passenger Door Lock
Switch Mux circuit and ground.
Is the resistance below 10000.0 ohms?
Yes
>> Repair the (G160) Passenger Door Lock Switch Mux cir-
cuit for a partial short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
8N - 42
POWER LOCKS - ELECTRICAL DIAGNOSTICS
DR/DH
RKE FOB BATTERY LOW
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.
•
When Monitored:
Upon activation of any button on the Remote Keyless Entry transmitter (fob).
•
Set Condition:
The RKE module monitors the input from the fobs and determines if the voltage is within tolerance. If the
battery voltage of the RKE fob falls between 2.0 and 3.5 volts the RKE module will communicates this to the
Instrument Cluster which in turn will set this code.
Possible Causes
BATTERIES LOW
RKE TTRANSMITER - LOW VOLAGE OUTPUT
Diagnosttic Test
1.
CHECK TROUBLE CODE
Turn the ignition on.
Using the RKE transmitter, press the UNLOCK button
six times or more.
With the DRBIII
T
, read DTCs.
Does the DRBIII
T
display RKE KEY FOB BAT-
TERY LOW?
Yes
>> Go To 2
No
>> Problem is intermittent and not present at
this time. Check the other transmitters
used with this vehicle to determine which
one set the code. Check the voltage of
each battery in FOB and ensure they
above 2.9 volts each.
Perform BODY VERIFICATION TEST -
VER 1. (Refer to 8 - ELECTRICAL/ELEC-
TRONIC
CONTROL
MODULES/FRONT
CONTROL MODULE - DIAGNOSIS AND
TESTING)
2.
BATTERIES LOW
Test the voltage of each battery in the RKE transmitter.
Is the voltage at or above 2.9 in each battery?
Yes
>> Replace the RKE Transmitter.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Replace the batteries and press the unlock button on the transmitter six times to clear the DTC.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
DR/DH
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 43
RKE MODULE COMMUNICATION LINK
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.
•
When Monitored:
Whenever battery power is applied the Instrument Cluster.
•
Set Condition:
The Instrument Cluster has learned that the vehicle is equipped with Remote Keyless Entry, but then is unable
to communicate with that module, this code will set. The Instrument Cluster provides power for the RKE mod-
ule and communicates by the PCI bus.
Possible Causes
RKE MODULE OPEN
IJNSTRUMENT CLUSTER
Diagnostic Test
1.
DTC PRESENT
Turn the ignition on.
With the DRBIII
T
, record and erase DTC’s.
With the DRBIII
T
, read DTC’s.
Operate the door locks several times from the RKE
transmitter while observing the DRBIII
T
.
Does the DRBIII
T
display RKE MODULE COMM
LINK?
Yes
>> Go To 2
No
>> Using the wiring diagram/schematic as a
guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST -
VER 1. (Refer to 8 - ELECTRICAL/ELEC-
TRONIC
CONTROL
MODULES/FRONT
CONTROL MODULE - DIAGNOSIS AND
TESTING)
8N - 44
POWER LOCKS - ELECTRICAL DIAGNOSTICS
DR/DH
RKE MODULE COMMUNICATION LINK (CONTINUED)
2.
RKE MODULE OPEN
Turn the ignition off.
Remove the Instrument Cluster.
Replace the RKE module with a known good module.
Connect all Cluster connectors.
With the DRBIII
T
, Program the RKE transmitter.
Operate the door locks using the RKE transmitter.
Do the door locks respond correctly with the RKE transmitter?
Yes
>> Replace the original RKE module.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
DR/DH
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 45
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