Dodge Ram Truck 1500-2500-3500. Manual — part 471

DRIVER DOOR LOCK SWITCH INPUT CIRCUIT OPEN OR SHORT TO VOLTAGE (CONTINUED)

5.

(Z421) and (Z941) DOOR LOCK SWITCH GROUND OPEN

Turn the ignition off.

Disconnect the Driver Window/Door Lock Switch C1 connector.

Using a 12-volt test light connected to 12-volts, check both Ground cir-
cuits in the Door Module C1 connector.

Does the test light illuminate brightly in both terminals?

Yes

>> Go To 6

No

>> Repair the (Z421) or (Z941) Ground circuit for an open.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

6.

(G161) DRIVER DOOR LOCK SWITCH MUX OPEN

Turn the ignition on.

Measure the voltage between the (G161) Driver Door Lock Switch
Mux circuit and ground.

Is the voltage above 4.6 volts?

Yes

>> Replace the Driver Window/Door Lock Switch.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

No

>> Repair the (G161) Driver Door Lock Switch Mux 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 - 26

POWER LOCKS - ELECTRICAL DIAGNOSTICS

DR/DH

DRIVER DOOR LOCK SWITCH INPUT CIRCUIT SHORTED

DR/DH

POWER LOCKS - ELECTRICAL DIAGNOSTICS

8N - 27

DRIVER DOOR LOCK SWITCH INPUT CIRCUIT SHORTED (CONTINUED)

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:
At all times when battery power is supplied to the Instrument Cluster.

•

Set Condition:
When the Instrument Cluster senses voltage to the driver door lock switch below .25 volts, the input circuit is
not valid and this code will set.

Possible Causes

(G161) DRIVER DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO GROUND

DOOR LOCK SWITCH SHORTED

INSTRUMENT 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 Driver
Door Lock Switch while monitoring the DRBIII

T

.

Does the DRBIII

T

display DRIVER DOOR LOCK

SW INPUT CIRCUIT SHORTED?

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 - 28

POWER LOCKS - ELECTRICAL DIAGNOSTICS

DR/DH

DRIVER DOOR LOCK SWITCH INPUT CIRCUIT SHORTED (CONTINUED)

2.

DOOR LOCK SWITCH SHORTED

Disconnect the Driver Window/Door Lock Switch C1 connector.

With the DRBIII

T

in sensors, read the DRV DOOR LOCK SW MUX

circuit.

Is the voltage above 4.6 volts?

Yes

>> Replace the Driver Window/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.

(G161) DRIVER DOOR LOCK SWITCH MUX CIRCUIT SHORTED

Turn the ignition off.

Disconnect the Instrument Cluster C4 connector.

Measure the resistance between the (G161) Driver Door Lock Switch
Mux circuit and ground.

Is the resistance below 1000.0 ohms?

Yes

>> Repair the (G161) Driver Door Lock Switch Mux circuit for

a 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)

DR/DH

POWER LOCKS - ELECTRICAL DIAGNOSTICS

8N - 29