Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Maintenance Reminder Lights

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OPERATION



All 1982-87 models equipped with a oxygen sensor have maintenance reminder warning light, located in the instrument cluster. The light will illuminate at approximately 30,000 miles (48,000 km). At this time, the oxygen sensor should be inspected and/or replaced and the entire emission system should be inspected. After the oxygen sensor and emission system have been serviced and repaired as necessary, the maintenance warning light must be reset. There two methods of resetting the lamp. The method will depend upon the vehicle model, year, engine and engine calibration.

Beginning in 1988, maintenance resets where no longer used. The CHECK ENGINE light will come on indicating a malfunction and a trouble code will be stored in the ECU memory. The light will extinguish when the problem is corrected.

RESETTING



Without Relay

On most early systems, the oxygen sensor lamp is reset, by disconnecting a wiring harness connector, located behind the instrument panel. The reminder light will no longer function.

WARNING LIGHT CONNECTOR LOCATIONS

See Figure 1



1983-86 Pulsar-light green and black with a light green tracer or black and white wires, located near the fuse box
 
1987 Pulsar-red and black, red and blue wires, located above the fuse box.
 
1982-83 Sentra-green and yellow or green and black wires, located above the fuse box.
 
1984 Sentra-light green and black with a light green tracer wires, located near the hood release handle.
 
1985-86 Sentra-light green and black wires, located above the fuse box.
 
1987 Sentra-red and black, red and blue wires, located above the fuse box.
 



Click image to see an enlarged view

Fig. Fig. 1: On vehicles without a relay, reset the oxygen sensor warning light by disconnecting the wiring harness as shown

With Relay

Some later production models may be equipped with a sensor relay. The relay is reset by either depressing a button on the relay or by inserting a small screwdriver into the reset hole. Reset relay at 30,000 miles (48,000 km) and 60,000 miles (96,000 km). At 90,000 miles (145,000 km), locate and disconnect warning light wire connector.

WARNING LIGHT RELAY LOCATIONS

See Figures 2, 3 and 4



Click image to see an enlarged view

Fig. Fig. 2: Resetting oxygen sensor warning light relay without a pushbutton



1986 Pulsar-the reset relay is located behind the right kick panel. At 90,000 miles (145,000 km), disconnect the connector with the red/black wire and red/blue wire located above the fuse box.
 
1987 Pulsar-the reset relay is located behind the left kick panel. At 90,000 miles (145,000 km), disconnect the connector with the red/black wire and red/blue wire located above the fuse box.
 
1985-86 Sentra-the reset relay is located behind the right kick panel. At 90,000 miles (145,000 km), disconnect the connector with the light green and black wire located near the hood release handle.
 
1987 Sentra-the reset relay is located behind the right kick panel. At 90,000 miles (145,000 km), disconnect the connector with the red/black wire and red/blue wire located above the fuse box.
 



Click image to see an enlarged view

Fig. Fig. 3: Resetting oxygen sensor warning light relay with a pushbutton-1985-86 vehicles



Click image to see an enlarged view

Fig. Fig. 4: Resetting oxygen sensor warning light relay with a pushbutton-1987 vehicles

 
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