Jeep Wrangler/YJ 1987-1995 Repair Guide

Electronic Control Unit (ECU)

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See Figure 1

REMOVAL & INSTALLATION





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Fig. Fig. 1: ECU location

The ECU is attached to the dash panel inside the passenger compartment. It is positioned just above the heater/air conditioner plenum housing, inline with the glove box.

  1. From inside the engine compartment, loosen and remove the ECU retaining bolts and nuts, located just to the right of the battery.
  2.  
  3. Disconnect the ECU wiring harness, then remove the ECU from the vehicle.
  4.  

If equipped with air conditioning, it will be necessary to remove the air conditioning fascia panel and ducts for access to the ECU and harness connector.

  1. Installation is the reverse of removal.
  2.  

 
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