## PGM-FI System

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

11-275

77. Measure voltage between ECM/PCM connector terminal E29 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there about 5 V (or battery voltage)?

YES | - Go to step 81.
NO | - Go to step 78.

78. Turn the ignition switch OFF.
79. Disconnect ECM/PCM connector E (31P).

80. Check for continuity between ECM/PCM connector terminal E29 and body ground.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the DLC and the ECM/PCM (E29).
NO | - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.

81. Turn the ignition switch OFF.
82. Disconnect ECM/PCM connector E (31P).
83. Turn the ignition switch ON (II).

Is the MIL on?

YES | - Repair short in the wire between the gauge assembly and the ECM/PCM (E31). If the wires are OK, replace the gauge assembly.
NO | - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.