Dodge Ram Truck 1500-2500-3500. Manual — part 253

REMOTE RADIO SWITCH CIRCUIT STUCK

For the Audio system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
Remote radio control MUX circuit is stuck or shorted to ground for greater than 30 seconds.

Possible Causes

LEFT REMOTE RADIO SWITCH STUCK OR SHORTED TO GROUND

RIGHT REMOTE RADIO SWITCH STUCK OR SHORTED TO GROUND

CLOCKSPRING

RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND AT THE SWITCH

CLOCKSPRING SHORTED TO GROUND

RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND

INSTRUMENT CLUSTER

1.

DETERMINE FAULT

Turn the ignition on.

NOTE: NOTE: Make sure the DRB can communi-
cate with the Radio before continuing.
With the DRBIII

T

, erase the Instrument Cluster

DTC’s.

Cycle the ignition switch from off to on and wait 1
minute.

With the DRBIII

T

, read the DTC’s.

Did this DTC reset?

Yes

>> Go To 2

No

>> Refer to the wiring diagrams located in

the service information to help isolate a
possible intermittent open or short.

Perform BODY VERIFICATION TEST -
VER 1.

8A - 14

AUDIO - ELECTRICAL DIAGNOSTICS

DR/DH

REMOTE RADIO SWITCH CIRCUIT STUCK (CONTINUED)

2.

LEFT REMOTE RADIO SWITCH STUCK OR SHORTED TO GROUND

WARNING: WARNING: To avoid personal injury or death, turn the
ignition off, disconnect the battery and wait 2 minutes before pro-
ceeding.

CAUTION: CAUTION: Do not place an intact undeployed airbag
module face down on a hard surface, the airbag module will pro-
pel into the air if accidently deployed.
Remove the Driver Airbag Module.

Disconnect the Left Remote Radio Switch harness connector.

Turn the ignition on, reconnect the battery.

With the DRB, enter Instrument Cluster then Sensors and monitor the
Remote Radio SW voltage.

Is the voltage above 3.2 volts?

Yes

>> Replace the Left Remote Radio Switch.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 3

3.

RIGHT REMOTE RADIO SWITCH STUCK OR SHORTED TO GROUND

WARNING: WARNING: To avoid personal injury or death, turn the
ignition off, disconnect the battery and wait 2 minutes before pro-
ceeding.

CAUTION: CAUTION: Do not place an intact undeployed airbag
module face down on a hard surface, the airbag module will pro-
pel into the air if accidently deployed.
Remove the Driver Airbag Module.

Disconnect the Right Remote Radio Switch harness connector.

Turn the ignition on, reconnect the battery.

With the DRB, enter Instrument Cluster then Sensors and monitor the
Remote Radio SW voltage.

Is the voltage above 3.2 volts?

Yes

>> Replace the Right Remote Radio Switch.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 4

4.

CHECK THE CLOCKSPRING

Turn the ignition off.

Disconnect the Clockspring C4 harness connector.

Turn the ignition on.

With the DRB, enter Instrument Cluster then Sensors and monitor the Remote Radio SW voltage.

Is the voltage above 3.2 volts?

Yes

>> Go To 5

No

>> Go To 6

DR/DH

AUDIO - ELECTRICAL DIAGNOSTICS

8A - 15

REMOTE RADIO SWITCH CIRCUIT STUCK (CONTINUED)

5.

RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND AT THE SWITCH

Turn the ignition off.

Disconnect the Clockspring C4 harness connector.

NOTE: NOTE: Ensure both remote radio switches are discon-
nected.
Measure the resistance between ground and the Radio Control MUX
circuit at the Clockspring C4 harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Repair the Radio Control MUX circuit for a short to ground

between the clockspring and the remote radio switches.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Repair the Radio Control MUX circuit for a short to the

Ground circuit between the clockspring and the remote
radio switches.

Perform BODY VERIFICATION TEST - VER 1.

6.

CLOCKSPRING SHORTED TO GROUND

Turn the ignition off.

Disconnect the Clockspring C1 harness connector.

Turn the ignition on.

With the DRB, enter Instrument Cluster then Sensors and monitor the Remote Radio SW voltage.

Is the voltage above 3.2 volts?

Yes

>> Replace the Clockspring in accordance with the service information.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 7

7.

RADIO CONTROL MUX CIRCUIT SHORTED TO GROUND

Turn the ignition off.

Disconnect the Clockspring C1 harness connector.

Disconnect the Instrument Cluster harness connectors.

Measure the resistance between ground and the Radio Control MUX
circuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the Radio Control MUX circuit for a short to ground

between the clockspring and the Instrument Cluster.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Replace the Instrument Cluster in accordance with the ser-

vice information.

Perform BODY VERIFICATION TEST - VER 1.

8A - 16

AUDIO - ELECTRICAL DIAGNOSTICS

DR/DH

PCI FAILURE

For the Audio system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
When the DRBIII

T

performs the PCI Amplifier Test.

•

Set Condition:
When the Amplifier detects a fault with the PCI circuitry.

Possible Causes

AMPLIFIER

1.

AMPLIFIER

NOTE: NOTE: The fault condition must be
present to continue diagnosis. Use the DRBIII

T

to perform the Amplifier pretest to verify the
fault condition is present before continuing
diagnosis.
Turn the ignition on.

With the DRBIII

T

, perform the Amplifier pretest.

Is the fault condition present?

Yes

>> Replace the Amplifier in accordance

with the Service Information.

Perform BODY VERIFICATION TEST -
VER 1.

No

>> Refer to the wiring diagrams in the ser-

vice information to help isolate a possi-
ble intermittent condition.

Perform BODY VERIFICATION TEST -
VER 1.

DR/DH

AUDIO - ELECTRICAL DIAGNOSTICS

8A - 17