Exhaust System Temperature Indicator: Testing and Inspection

FAULT DIAGNOSIS HINTS
When current (+15 circuit) is applied to relay pin 1, the warning lamp is grounded and lights up for about 3 seconds.

If the lamp stays on, there is a break in the temperature sensor circuit. Normally, the warning lamp goes out and does not light up unless the temperature exceeds the limit value.
1. Check that fuse 13 is intact and that current is supplied to the temperature sensor and relay.
2. Also check the connectors, wiring harness and ground connections.