Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

O/D OFF INDICATOR LIGHT DOES NOT ILLUMINATE WHEN O/D OFF SWITCH IS TURNED ON - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Are other indicator lights illuminated with ignition switch at ON?	Yes	Inspect meter fuse.
1		No	Go to next step.
2	Inspect O/D OFF switch. (See O/D OFF SWITCH INSPECTION ) Is O/D OFF switch okay?	Yes	Go to next step.
2		No	Replace O/D OFF switch. (See O/D OFF SWITCH REMOVAL/INSTALLATION )
3	Inspect TCM terminal L voltage. (See TRANSMISSION CONTROL MODULE (TCM) INSPECTION ) Is terminal voltage okay?	Yes	Go to next step.
3		No	Inspect for continuity between O/D OFF switch and TCM terminal K.
4	Remove O/D OFF indicator light. Is O/D OFF indicator light bulb burned out?	Yes	Replace O/D OFF indicator light.
4		No	Inspect for open circuit or disconnected connector in following harness: Ignition switch and O/D OFF indicator light O/D OFF indicator light and TCM terminal L including instrument cluster circuit board
5	Verify test results. If okay, return to diagnostic index to service any additional symptoms. If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information is not available, replace TCM.