Control Unit Input Test

Disconnect the 8-P connector from the control unit. Make the following input tests at the connector terminals. If all tests prove OK, yet the system still fails to work, substitute the control unit with a known-good one. If the system is then OK, replace the control unit.

NOTE: If the shift lock solenoid clicks when the ignition switch is ON and the brake pedal is pushed (the shift lever is in position P and the accelerator is in its rest position), the shift lock system is electronically normal. If the shift lever cannot be shifted from position P, see page 23-162 and section 14.

Shift Lock System:
No.	Wire	Test condition	Test: desired result	Possible cause (if result is not obtained)
1	YEL	Ignition switch ON.	Check for voltage to ground: it should be battery voltage.	•   Blown No. 15 (10 A) fuse. •   An open in the wire.
2	WHT/RED	Ignition switch ON. Step on the brake pedal.	Check for voltage to ground: there should be 1 V or less.	•   Faulty PGM-FI ECU. •   An open in the wire. •   Faulty brake switch (see Section 11). •   Faulty throttle angle sensor (see Section 11).
		Ignition switch ON. Step on the brake pedal and the ac- celerator at the same time.	Check for voltage to ground: it should be approx. 3 V.
3	GRN/WHT	Shift lever in position P.	Check for continuity to ground: there should be continuity.	•   Faulty shift position console switch. •   Poor ground (G201, G401). •   An open in the wire.
4	YEL/BLK	Ignition switch ON.	Check for voltage to ground: it should be battery voltage.	•   Blown No. 15 (10 A) fuse. •   Faulty shift lock solenoid. •   An open in the wire.
No.	Wire	Test condition	Test: desired result	Possible cause (if result is not obtained)
1	BLK	Under all conditions.	Check for continuity to ground: there should be continuity.	•   Poor ground (G201, G401). •   An open in the wire.
2	GRN/WHT	Shift lever in position P.	Check for continuity to ground: there should be continuity.	•   Faulty shift position console switch. •   Poor ground (G201, G401). •   An open in the wire.
3	WHT/YEL	Ignition switch turned to ACC and the key pushed in.	Check for voltage to ground: it should be battery voltage.	•   Blown No. 42 (20 A) fuse. •   Faulty steering lock assembly (key interlock solenoid). •   An open in the wire.
4	WHT/BLU	Ignition switch turned to ACC and the key pushed in.	Check for voltage to ground: it should be battery voltage.	•   Blown No. 42 (20 A) fuse. •   Faulty steering lock assembly (key interlock solenoid). •   An open in the wire.