Code 58, Pass-Key Fuel Enable CKT: Notes

Personal Automotive Security System (PASS-KEY) is designed to disable vehicle operation if an incorrect ignition key or starting procedure is used. If correct key and starting technique are used, PASS-KEY decoder module sends a fuel enable signal to PCM and energizes starter enable relay. If proper signal does not reach PCM on circuitNo. 229, PCM will not pulse injectors and vehicle will not start; Code 58 will set.

1. If vehicle will not crank with Code 58 stored, problem affects entire PASS-KEY system and is not isolated to fuel enable circuit.
2. PCM applies and monitors a 5-volt signal on circuit No. 229. Decoder module will pulse this signal to ground when proper key and starting technique are used. This test ensures PCM is supplying 5-volt signal and circuit is not open or shorted to ground.
3. Checks PWM signal from PASS-KEY module. Because 5 volts supplied by PCM is being pulsed to ground, voltage on circuit No. 229 should measure about 2.5 volts.
4. Checks for faulty PCM or intermittent condition by clearing codes. Because PCM ignores absence of fuel enable signal only when Code 58 is stored, vehicle should not start if problem is present and Code 58 is not.