Check Key Warning Switch

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK FUSE. Remove and visually check the fuse No. 6 (in the main fuse box).	Is the fuse blown out?	Replace the fuse with a new one.	Go to step 2.
2 CHECK KEY WARNING SWITCH CIRCUIT. Disconnect the keyless entry control module harness connector. Insert the key into ignition switch. (LOCK position) Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B176) No. 9 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 3.	Go to step 4.
3 CHECK KEY WARNING SWITCH CIRCUIT. Remove the key from ignition switch. Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (B176) No. 9 (+) - Chassis ground (-):	Is the voltage 0 V?	The key warning switch is OK.	Go to step 4.
4 CHECK KEY WARNING SWITCH. Disconnect the key warning switch harness connector. Insert the key into ignition switch. (LOCK position) Measure the resistance between key warning switch terminals. Terminals No. 1 - No.2:	Is the resistance less than 1 Ω?	Go to step 5.	Replace the key warning switch.
5 CHECK KEY WARNING SWITCH. Remove the key from ignition switch. Measure the resistance between key warning switch terminals. Terminals No. 1 - No.2:	Is the resistance more than 1 MΩ?	Check the following: Harness for open circuits and shorts between the key warning switch and fuse. Harness for open circuits and shorts between the keyless entry control module and the key warning switch.	Replace the key warning switch.