Key On/Engine Off Self-Test

This is a static check of processor input and output circuits. Connect the STAR tester or VOM to vehicle Self-Test connector, making sure to connect VOM correctly. See Fig 1 . Turn ignition switch to "ON" position to start Self-Test. DO NOT depress throttle during test. Observe and record all On Demand and Continuous/Memory service codes.
If any codes appear, refer to the proper test shown in the reference table for that specific engine. Start with the first code displayed. If the test refer you to other checks, perform them as instructed. When more than one code is displayed, repair problems in the order that codes are displayed.

NOTE: When any repair has been completed, Quick Test MUST be repeated BEFORE attempting to repair any other problems identified by service codes. Proceed with repairs as indicated by KEY ON/ENGINE OFF SELF-TEST RESULTS table and then by ON DEMAND CODES table.

Fig 1: Analog VOM Hook-Up for Reading Codes This applies to all models.

ON DEMAND CODES

Code	Test to Perform
15	Replace ECA, retest
21	CIRCUIT TEST G
22	CIRCUIT TEST H
23	CIRCUIT TEST J
24	CIRCUIT TEST D
26	CIRCUIT TEST K
651	CIRCUIT TEST G , Step 4)
53	CIRCUIT TEST J , Step 3)
54	CIRCUIT TEST D , Step 4)
56	CIRCUIT TEST K , Step 3)
61	CIRCUIT TEST G , Step 6)
63	CIRCUIT TEST J , Step 6)
64	CIRCUIT TEST D , Step 6)
66	CIRCUIT TEST K , Step 6)
67	CIRCUIT TEST M

KEY ON/ENGINE OFF SELF-TEST RESULTS

On Demand Codes	Continuous/Memory Codes	Go To:
11	11	COMPUTED IGNITION TIMING CHECK
Any	11	On Demand Codes
Any	Any	On Demand Codes
11	Any (Exc. 15)	COMPUTED IGNITION TIMING CHECK
11	15	CIRCUIT TEST NN , Step 7)
None	None	CIRCUIT TEST NN , Step 1)