Dodge Ram Truck 1500-2500-3500. Manual — part 622
PRNDL MESSAGE NOT RECEIVED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module does not receive a gear selector message from the TCM
Possible Causes
LOST COMMUNICATION WITH TCM
HANDS FREE MODULE
Diagnostic Test
1.
ATTEMPT TO COMMUNICATE WITH THE TCM
Turn the ignition on.
Turn the radio on.
With the DRB, attempt to communicate with the TCM.
Was the DRB able to communicate with the TCM?
Yes
>> Go To 2
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) and
perform the related symptom.
2.
ERASE DTC AND ATTEMPT TO RESET
With the DRB, erase the HFM DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRB, read the HFM DTC’s.
Did this DTC reset?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.)
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
8T - 52
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
DR/DH
RADIO MESSAGE NOT RECEIVED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module does not receive a message from the radio.
Possible Causes
LOST COMMUNICATION WITH RADIO
HANDS FREE MODULE
Diagnostic Test
1.
ATTEMPT TO COMMUNICATE WITH THE RADIO
Turn the ignition on.
Turn the radio on.
With the DRB, attempt to communicate with the radio.
Was the DRB able to communicate with the radio?
Yes
>> Go To 2
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) and
perform the related symptom.
2.
ERASE DTC AND ATTEMPT TO RESET
With the DRB, erase the HFM DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRB, read the HFM DTC’s.
Did this DTC reset?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.)
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
DR/DH
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 53
RAM WRITE ERROR
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects a fault during an internal diagnostic check.
Possible Causes
HANDS FREE MODULE
Diagnostic Test
1.
ERASE DTC AND ATTEMPT TO RESET
Turn the ignition on.
With the DRB, read and record the HFM DTC’s and then erase the DTC’s.
Perform 5 ignition key cycles, leaving the ignition key on for a minimum of 90 seconds per cycle.
With the DRB, read the HFM DTC’s.
Did this DTC reset?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.)
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
8T - 54
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
DR/DH
RIGHT AUDIO INPUT SHORT TO GROUND
DR/DH
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 55
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