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NO.1 SECURITY LIGHT REMAINS ON OR DOES NOT ILLUMINATE

id0903f5857200

1 | Security light remains on or does not illuminate.
DETECTION CONDITION | Malfunction in security light circuit
POSSIBLE CAUSE | • PCM malfunction • Instrument cluster (print plate) malfunction • Open or short to power supply in wiring harness between instrument cluster and PCM

## Diagnostic Procedure

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

Step | Inspection | Action
--- | --- | ---
1 | INSPECT OTHER WARNING AND INDICATOR LIGHTS CIRCUIT IN INSTRUMENT CLUSTER • Turn ignition switch to the ON position. • Do other warning and indicator lights illuminate? | Yes | Turn ignition switch to the LOCK position, then go to the next step.
No | Inspect the instrument cluster power supply system and ground system, then go to Step 5.
2 | INSPECT INSTRUMENT CLUSTER • Turn ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the PCM connector. • Connect the instrument cluster terminal 1G to ground using the jumper wire. • Connect the negative battery cable. • Turn ignition switch to the ON position. • Does air bag system warning light illuminate? | Yes | Go to the next step.
No | Replace the instrument cluster, then go to Step 4. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
* 3 | INSPECT WIRING HARNESS BETWEEN INSTRUMENT CLUSTER AND PCM • Turn ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the instrument cluster connector. • Inspect the wiring harness between instrument cluster connector terminal 1G and PCM connector 1AG for the following: - Short to ground - Short to power supply - Open circuit • Is the wiring harness normal? | Yes | Replace the PCM and reprogram immobilizer system, then go to the next step. (See PCM REMOVAL/INSTALLATION.) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING.)
No | Replace the wiring harness, then go to the next step.
4 | CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Turn ignition switch to the LOCK position. • Disconnect the negative battery cable. • Connect the instrument cluster connector. • Connect the PCM connector. • Connect the negative battery cable. • Turn ignition switch to the ON position. • Does security light operate properly? | Yes | Complete troubleshooting, then explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.