CHECK KEY WARNING SWITCH CIRCUIT.

1) Remove the key from ignition switch.

2) Measure the voltage between harness connector terminal and chassis ground.

NOTE:

If noise exists, 0 V may not be detected.

Connector & terminal

(B176) No. 1 (+) — Chassis ground (−):

QUESTION

Is the voltage approx. 0 V?

Yes No

The key warning switch is OK.