Diagnostic Procedure

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT TRANSMITTER BATTERY INSTALLATION AND TYPE Visually inspect the transmitter battery. Are the below items correct? Transmitter battery installation (correct polarity) Battery type (CR1620)	Yes	Go to the next step.
1		No	Install the transmitter battery properly or replace with the specified transmitter battery (CR1620), then go to Step 12.
2	INSPECT TRANSMITTER BATTERY TERMINALS FOR RUST AND POOR CONNECTION Visually inspect the transmitter. Is there rust on the transmitter battery terminals (positive or negative)? Is there poor connection between the terminals and battery?	Yes	Replace the transmitter battery or repair the transmitter battery terminal, then go to Step 13.
2		No	Go to the next step.
3	INSPECT TRANSMITTER BATTERY Inspect the transmitter battery. Is the battery voltage normal?	Yes	Go to the next step.
3		No	Replace the transmitter battery, then go to Step 12.
4	INSPECT KEYLESS RECEIVE BRACKET INSTALLATION Is the keyless receive bracket installed securely?	Yes	Go to the next step.
4		No	Install bracket securely, then go back to Step 6 of KEYLESS ENTRY SYSTEM PRELIMINARY inspection.
5	INSPECT GROUND SCREW INSTALLATION BETWEEN KEYLESS RECEIVE AND KEYLESS RECEIVE BRACKET Are the keyless receive and keyless receive bracket connected securely to the ground screw?	Yes	Go to the next step.
5		No	Install the screw securely, then go back to Step 6 of KEYLESS ENTRY SYSTEM PRELIMINARY inspection.
6	INSPECT IF MALFUNCTION IS IN TRANSMITTER BATTERY OR ELSEWHERE Replace with a transmitter battery known to be good. Does the keyless entry system operate properly?	Yes	Replace the transmitter battery, then go to Step 12.
6		No	Go to the next step.
7	INSPECT IF MALFUNCTION IS IN TRANSMITTER OR KEYLESS CONTROL MODULE Reprogram the keyless control module ID code using another known good transmitter. Does the keyless entry system operate properly?	Yes	Replace the transmitter and reprogram the transmitter ID code, then go to Step 12.
7		No	Go to the next step.
8	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS RECEIVER) OR ELSEWHERE Measure the voltage at the following keyless receiver terminal: Power supply signal (terminal 1A) Is the voltage B+?	Yes	Go to the next step.
8		No	Repair the wiring harness between the fuse block and keyless receiver, then go to Step 12.
9	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND GROUND) OR ELSEWHERE Is there continuity between keyless receiver connector terminal 1E and ground?	Yes	Go to the next step.
9		No	Repair the wiring harness between the keyless receiver and ground, then go to Step 12.
10	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND KEYLESS CONTROL MODULE) OR ELSEWHERE Disconnect the keyless receiver connector and keyless control module. Is there continuity between the following terminals? Terminal 1A-terminal 3S Terminal 1D-terminal 3U	Yes	Go to the next step..
10		No	Repair the wiring harness between the keyless receiver and keyless control module, then go to Step 12.
11	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND KEYLESS CONTROL MODULE) OR KEYLESS CONTROL MODULE Measure the voltage at keyless control module terminal 3S. When transmitter operated: Any transmitter button is operated without key in steering lock (key reminder switch off): 5 V --> 1.0 V or less Key is in steering lock (key reminder switch on): 5 V Is the voltage normal?	Yes	Replace the keyless control module, then go to the next step.
11		No	Replace the keyless receiver, then go to the next step.
12	REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customer.
12		No	Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.