Diagnostic Routine V

Diagnostic Routine V

Diagnostic Overview

P193E

Refer to Wiring Diagram Set 54 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Controls and Compressor Cycling .

DTC Fault Trigger Conditions






Pinpoint Test

1. VERIFY THE CUSTOMER CONCERN

1. Ignition ON.

2. Verify that there is an observable symptom present.

Is an observable symptom present?






2. CHECK THE COMMUNICATION NETWORK

1. Ignition ON.

2. Using a scan tool, perform network test.

3. Carry out the network test.

Does the BCM (Body Control Module) pass the network test?






3. RECHECK THE PCM (Powertrain Control Module) FOR DTCs (Diagnostic Trouble Codes)

1. Clear the DTCs (Diagnostic Trouble Codes).

2. Operate the system and test the system for normal operation.

3. Using a scan tool, perform PCM (Powertrain Control Module) self-test.

Are any PCM (Powertrain Control Module) DTCs (Diagnostic Trouble Codes) present?






4. CHECK FOR CORRECT PCM (Powertrain Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all the PCM (Powertrain Control Module) connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the PCM (Powertrain Control Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?