Various Data Procedures: Notes

Once the fault area is identified, the circuit must be checked to determine if the wiring or component is at fault. Use any of the following methods to diagnose a suspected PCM wire circuit or device. Some methods are particular to a certain type of PCM device.

• Change Condition to Cause Response by Input
• Change Input and Verify Output Response
• Click Testing/Output State Control
• Coil Resistance (Solenoids/Relays)
• Harness Opens
• Harness Shorts