## PGM-FI System

#### MIL Circuit Troubleshooting (cont'd)

11-86

1. Turn the ignition switch OFF.

1. Disconnect the throttle position (TP) sensor.

1. Turn the ignition switch ON (II).

1. Measure voltage between body ground and ECM connector terminal A20.

ECM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES - Replace the TP sensor.

NO - Go to step 72.

1. Turn the ignition switch OFF.

1. Disconnect ECM connector A (31P).

1. Check for continuity between ECM connector terminal E29 and body ground.

ECM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES - Repair short in the wire between the ECM (A20) and the TP sensor.

NO - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

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