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Check the continuity between the ignition pulse generator connector terminal and ground.

Connection: White/Yellow - Ground Standard: No continuity

| No continuity

Abnormal

-• Faulty ignition pulse generator.

Crank the engine with the starter motor and measure the ignition pulse generator peak volt age at the ignition pulse generator 2P connector.

Connection: Yellow (+) - Yellow/White (-) Standard: 0.7 V minimum (20 C/68 F)

Normal

Connect the ignition pulse generator 2P connector.

Disconnect the ECM connectors. Connect the test harness to ECM connectors.

Out of range

Faulty ignition pulse generator.

Out of range

Crank the engine with the starter motor arid -► • Open circuit in White/Yellow wire.

measure the ignition pulse generator peak voltage at the test harness terminals.

• Open circuit in Yellow wire.

Connection: B11 (+) - Ground (-) Standard: 0.7 V minimum (20 C/68'F)

Normal

Replace the ECM with a new one, and inspect it again.

PGM-FI MIL 21 BLINKS (O2 SENSOR/CALIFORNIA TYPE ONLY)

Disconnect the O2 sensor connector.

Check for loose or poor contact on the O2 sen sor connector.

Turn the ignition switch to "OFF".

Disconnect the O2 sensor connector.

Check for loose or poor contact on the O2 sen sor connector.

Disconnect the ECM connectors. Connect the test harness to ECM connectors.

Check the continuity between the test harness terminal and O2 sensor connector terminal.

Connection: Orange/White - A5 Standard: Continuity

No continuity

Open circuit in O2 sensor OranyeAA/hite wire.

Continuity

Check the continuity between the 0/ sensor connector terminal and ground.

Check the continuity between the 0/ sensor connector terminal and ground.

Connection: Orange/White - Ground Standard: No continuity

No continuity

Connect the Os sensor connector.

Turn the ignition switch to "ON" and warm up the engine until the coolant temperature is flO'C

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