Dodge Ram. Manual — part 129
Symptom:
PRNDL MESSAGE NOT RECEIVED
When Monitored and Set Condition:
PRNDL MESSAGE NOT RECEIVED
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module does not receive a gear selector message from the
PCM/TCM.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE PCM (TCM)
MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the PCM (TCM).
Was the DRBIII
t able to I/D or communicate with the PCM?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2
With the DRBIII
t, erase DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Hands Free Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
513
TELECOMMUNICATION
Symptom:
RADIO MESSAGE NOT RECEIVED
When Monitored and Set Condition:
RADIO MESSAGE NOT RECEIVED
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module does not receive a message from the radio.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE RADIO
MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Turn the Radio on.
With the DRBIII
t, attempt to communicate with the Radio.
Was the DRBIII
t able to I/D or communicate with the Radio?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2
With the DRBIII
t, erase DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Hands Free Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
514
TELECOMMUNICATION
Symptom List:
RIGHT AUDIO INPUT SHORT TO GROUND
RIGHT AUDIO INPUT SHORT TO VOLTAGE
RIGHT AUDIO OUTPUT 1 SHORT TO GROUND
RIGHT AUDIO OUTPUT 1 SHORT TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be RIGHT AUDIO INPUT SHORT
TO GROUND.
When Monitored and Set Condition:
RIGHT AUDIO INPUT SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects low voltage on the input circuit.
RIGHT AUDIO INPUT SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects high voltage on the input circuit.
RIGHT AUDIO OUTPUT 1 SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects a short to ground on the Right Audio
Output circuit.
RIGHT AUDIO OUTPUT 1 SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects a short to voltage on the Right Audio
Output circuit.
POSSIBLE CAUSES
HANDS FREE AUDIO OUTPUT COMMON CKT OPEN
HANDS FREE MODULE
LEFT AUDIO OUTPUT AND RIGHT AUDIO OUTPUT CIRCUITS SHORTED TOGETHER
RIGHT AUDIO OUTPUT CIRCUIT OPEN
RIGHT AUDIO OUTPUT CIRCUIT SHORT TO GROUND
RIGHT AUDIO OUTPUT CIRCUIT SHORT TO VOLTAGE
INTERMITTENT CONDITION
515
TELECOMMUNICATION
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, erase HFM DTCs.
Attempt to make a phone call using the system.
With the DRBIII
t, read HFM DTCs.
Does the DRBIII
t display this DTC?
All
Yes
→ Go To 2
No
→ Go To 7
2
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance of the Right Audio Output circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Right Audio Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance between ground and the Right Audio Output circuit.
Is the resistance above 1000.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Right Audio Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connector.
Turn the ignition on.
Measure the voltage of the Right Audio Output circuit.
Is the voltage below 1.0 volt?
All
Yes
→ Go To 5
No
→ Repair the Right Audio Output circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance of the Hands Free Audio Output Common circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Hands Free Audio Output Common circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
516
TELECOMMUNICATION
RIGHT AUDIO INPUT SHORT TO GROUND —
Continued
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