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NO RESPONSE Message
- Ensure ignition is OFF and disconnect DRB-II. Using a DVOM, check resistance of Pink wire (Black/Red wire on Wrangler) between engine controller terminal No. 25 and engine diagnostic connector. See Figure
. If resistance is 10 ohms or more, repair open Pink wire (Black/Red wire on Wrangler).
- If resistance is less than 10 ohms, check resistance of Light Green wire (Black/Pink wire on Wrangler) between engine controller terminal No. 45 and engine diagnostic connector. If resistance is 10 ohms or more, repair open Light Green wire (Black/Pink wire on Wrangler).
- If resistance is less than 10 ohms, turn ignition off and disconnect DRB-II, DRB-II cartridge, and adapter cable. Find a second vehicle identical in equipment to vehicle being tested.
- Connect DRB-II to substitute (second) vehicle and use DRB-II as you did on original vehicle. If message screen is still blank, adapter cable or DRB-II (including cartridge) is faulty. Substitute adapter cable with a known good cable to find faulty component.
- If it is determined that adapter cable, DRB-II and cartridge are okay, replace engine controller. Reset EMR mileage and, on vehicles equipped with factory theft alarm, start vehicle at least 20 times to enable theft alarm system.