No.5 PCM DOES NOT RESPOND TO M-MDS[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))]
id0903g7819600
STEP |
INSPECTION |
ACTION |
|
---|---|---|---|
1
|
INSPECT PCM CONNECTOR
Turn the ignition switch off.
Disconnect the PCM connector.
Inspect the PCM connector for damage.
Is the PCM connector normal?
|
Yes
|
Go to the next step.
|
No
|
Replace the wiring harness. Perform the network test.
|
||
2
|
INSPECT FOR OPEN CIRCUIT BETWEEN PCM AND DLC-2
Turn the ignition switch off.
Disconnect the PCM connector.
Measure the resistance between the following PCM terminals and DLC-2 connector terminals.
• PCM terminal 16 and DLC-2 terminal N
• PCM terminal 15 and DLC-2 terminal M
Is the resistance less than 5 ohms?
|
Yes
|
Go to the next step.
|
No
|
Replace the wiring harness. Perform the network test.
|
||
3
|
INSPECT PCM OPERATION
Disconnect all the PCM connectors.
Inspection:
• Corrosion
• Terminal separation
Connect all the PCM connectors and verify that their positions are correct.
Operate the system and inspect for any malfunction.
Is any malfunction still present?
|
Yes
|
Replace the PCM. Perform the network test.
|
No
|
The system operates normally. The malfunction may result from loose connectors or corrosion. Clear the DTC. Repeat the self-test.
|