## PGM-FI System

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

11-78

1. Turn the ignition switch OFF.

1. Disconnect the inertia switch 3P connector.

1. Connect the inertia switch 3P connector terminals No. 1 and No. 3 with a jumper wire.

INERTIA SWITCH 3P CONNECTOR

Wire side of female terminals

1. Turn the ignition switch ON (II).

   Does the MIL come on for 2 seconds after the ignition switch is turned ON (II)?

YES - Replace the inertia switch.

NO - Go to step 13.

1. Turn the ignition switch OFF.

1. Turn the ignition switch ON (II).

   Is the low oil pressure light on?

YES - Go to step 17.

NO - Go to step 15.

1. Inspect the No. 10 METER (7.5 A) fuse in the under-dash fuse/relay box.

   Is the fuse OK?

YES - Go to step 17.

NO - Repair short in the wire between No. 10 METER (7.5A) fuse and the gauge assembly. Also replace the No. 10 METER (7.5A) fuse.

1. Inspect the No. 20 IG1 (50A) fuse in the under-hood fuse/relay box.

   Is the fuse OK?

YES - Repair open in the wire between the No. 20 IG (50A) fuse and the gauge assembly. If the wires are OK, test the ignition switch, refer to the 2001 Civic Shop Manual (see page 22-131).

NO - Repair short in the wire between No. 20 IG (50A) fuse and the under-hood fuse/relay box. Also replace the No. 20 IG (50A) fuse.

1. Try to start the engine.

   Does the engine start?

YES - Go to step 18.

NO - Go to step 21.

1. Turn the ignition switch OFF.

1. Connect ECM connector terminal E31 and body ground with a jumper wire.

ECM CONNECTOR E (31P)

Wire side of female terminals

1. Turn the ignition switch ON (II).

   Is the MIL on?

YES - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

NO - Check for an open in the wire between the ECM (E31) and the gauge assembly. Also check for a blown MIL bulb. If the wires and the bulb are OK, replace the gauge assembly.

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