Dodge Ram Truck 1500-2500-3500. Manual — part 577
PCM STATUS FAILURE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
This DTC exists when a PCM STATUS message was not received from the PCM for at least 20.0 consecutive
seconds.
Possible Causes
WIRE HARNESS FAILURE
SKIM
PCM
Diagnostic Test
1.
ACTIVE DTC
NOTE: make sure the PCM has proper power and ground connections before continuing.
With the scan tool, read and record the SKIM DTCs then erase the SKIM DTCs.
Turn the ignition off.
Wait 2 minutes.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
2.
INTERMITTENT WIRING PROBLEM
Turn the ignition off.
NOTE: Visually inspect the related wiring harness and PCI Bus circuits. Look for any chafed, pierced,
pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or cor-
roded terminals.
NOTE: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform SKIS VERIFICATION. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD
PROCEDURE)
No
>> Go To 3
8Q - 10
VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS
DR/DH
PCM STATUS FAILURE (CONTINUED)
3.
SKIM/PCM
NOTE: NOTE: Before proceeding it will be necessary to obtain the SKIM PIN.
Turn the ignition on.
With the scan tool, display and erase all PCM and SKIM DTC’s.
Perform 5 ignition key cycles, leaving the ignition key on for a minimum of 90 seconds per cycle.
With the scan tool, read the SKIM DTCs.
Does the code appear?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform SKIS VERIFICATION. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD
PROCEDURE)
No
>> Test complete, the conditions that set this DTC are not present at this time.
DR/DH
VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS
8Q - 11
SERIAL LINK EXTERNAL FAULT
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
At ignition on, after ignition on during any rolling code handshake that occurs with the PCM due to a SKIM
reset, or during SECRET KEY transfers to the PCM.
•
Set Condition:
When the SKIM does not receive an expected PCI BUS message transmission acknowledgement from the
PCM after 3 transmit attempts.
Possible Causes
WIRE HARNESS FAILURE
SKIM
PCM
Diagnostic Test
1.
ACTIVE DTC
NOTE: make sure the PCM has proper power and ground connections before continuing.
With the scan tool, read and record the SKIM DTCs then erase the SKIM DTCs.
Turn the ignition off.
Wait 2 minutes.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
2.
INTERMITTENT WIRING PROBLEM
Turn the ignition off.
NOTE: Visually inspect the related wiring harness and PCI Bus circuits. Look for any chafed, pierced,
pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or cor-
roded terminals.
NOTE: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform SKIS VERIFICATION. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD
PROCEDURE)
No
>> Go To 3
8Q - 12
VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS
DR/DH
SERIAL LINK EXTERNAL FAULT (CONTINUED)
3.
SKIM/PCM
NOTE: NOTE: Before proceeding it will be necessary to obtain the SKIM PIN.
Turn the ignition on.
With the scan tool, display and erase all PCM and SKIM DTC’s.
Perform 5 ignition key cycles, leaving the ignition key on for a minimum of 90 seconds per cycle.
With the scan tool, read the SKIM DTCs.
Does the code appear?
Yes
>> Replace and program the Powertrain Control Module per Service Information.
Perform SKIS VERIFICATION. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD
PROCEDURE)
No
>> Test complete, the conditions that set this DTC are not present at this time.
DR/DH
VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS
8Q - 13
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