DTC 09 - Headlight Relay On/Off Signal

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

Fig 1: Identifying Instrument Cluster Connector Terminals (DTC 09)

Courtesy of MAZDA MOTORS CORP.

DIAGNOSTIC PROCEDURE - DTC 09

STEP	INSPECTION	INDICATION	ACTION
1	Turn headlight switch to headlight position. (Headlight relay on.)	on	Go to next step.
1		off	Measure voltage at instrument cluster terminal 3F. Is voltage 0 V ? If as specified, replace instrument cluster. If not as specified, inspect following parts. Headlight relay Headlight switch Wiring harness (Headlight relay - Headlight switch - instrument cluster)
2	Turn headlight switch off. (Headlight relay off.)	on	Measure voltage at instrument cluster terminal 3F. Is voltage B+ ? If as specified, replace instrument cluster. If not as specified, inspect following parts. Headlight relay Headlight switch Wiring harness (Battery - headlight relay - headlight switch - instrument cluster)
2	Turn headlight switch off. (Headlight relay off.)	off	Input signal to instrument cluster is okay.