MAINTENANCE REMINDER LIGHT RESET PROCEDURES

1988 Jeep Cherokee

1988-92 MAINTENANCE

Chrysler Motors Maintenance Reminder Lights

Jeep; Cherokee, Comanche, Wagoneer (1988-90), Wrangler

EMISSION MAINTENANCE INDICATOR LIGHT (1988-90)

Vehicles are equipped with an emission maintenance indicator light on instrument cluster. This light will come on one time at 82, 500 miles to alert driver that emission service is required. At this time, oxygen sensor and PCV valve must be replaced and all other emission components should be inspected and serviced or replaced as necessary.

Indicator timer is located under dash, near accelerator pedal or to right of steering column. Timer cannot be reset. To turn off light, timer must be replaced or disconnected. Since timer and sensor are interdependent, if timer should fail prematurely, oxygen sensor should be replaced at same time to preserve correct replacement interval.

To replace timer on Cherokee, Comanche and Wagoneer models, remove cruise control module (if equipped). Remove timer mounting screws. Disconnect electrical connector. On Wrangler models, remove timer mounting screws. Disconnect electrical connector. On all models, install remaining components.

EMISSION MAINTENANCE INDICATOR LIGHT (1991-92)

Vehicles are equipped with an emission maintenance indicator light on instrument cluster. This light will come on one time at 82, 500 miles to alert driver that emission service is required. At this time, oxygen sensor must be replaced and all other emission components should be inspected and serviced or replaced as necessary. Chrysler’s Diagnostic Readout Box (DRB-II) tester is required to reset the emission maintenance indicator light.

Reset Procedure

Using DRB-II tester, access SELECT SYSTEMS. Select appropriate engine. Select with or without A/C. Select FUEL & IGNITION. Select ADJUSTMENTS. Select RESET EMR LIGHT. Reset EMR light. When DRB-II is finished resetting light, DRB-II display will read EMR LIGHT IS RESET.