P2533-IGNITION SWITCH RUN/START POSITION CIRCUIT

For a complete wiring diagram Refer to Section 8W

Possible Causes

CHECK THE ECM POWER AND GROUNDS

ENGINE CONTROL MODULE

Diagnostic Test

1. VERIFY CURRENT DTC

Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform several engine run cycles, turning the ignition off for at least 20 seconds between each engine run cycle.
With the scan tool, read the ECM DTCs.

Did this DTC set again?

Yes

Go To 2

No

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2. CHECK POWER AND GROUNDS

Refer to symptom Checking the ECM Power and Grounds.

Are the ECM Power and Ground circuits o.k.?

Yes

Replace the ECM in accordance with the Service Information.

Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)