KD1 - Enter Output State Diagnostic Test Mode

NOTE: Do not use STAR tester for this step, use Analog Volt/Ohm Meter (VOM)/Digital Volt/Ohm Meter (DVOM).

- Key "OFF".

- Disconnect electrical connector on the speed control servo, if equipped.

- DVOM on 20 volt scale.

- Connect DVOM negative test lead to Self Test Output (STO) circuit at Data Link Connector (DLC) and positive test lead to B+.

- Jumper STI circuit to SIG RTN at the Self-Test connector.

- Perform Key On Engine Off Self-Test until the completion of the Continuous Memory Diagnostic Trouble Code (DTC). Quick Test Appendix (Detailed Testing Instructions)

- DVOM will indicate less than 1.0 volt when test is completed.

- Depress and release the throttle.

- Does voltage increase?

Yes -- Remain in Output State test mode. Go to KD2. KD2 - Check Canister Purge Solenoid Electrical Operation

No -- Depress throttle to Wide Open Throttle (WOT) and release. If STO voltage does not go high, leave equipment hooked up and perform pinpoint test step QC1. QC1 - Check For Codes 23, 53, 63, 121, 122 or 123