Key Interlock Does Not Operate

Ensure shift lock operates properly. If not, recheck testing procedures previously listed. If shift lock is functioning properly, check if voltage across pin No. 3 of control unit and vehicle ground is 10 volts minimum. If voltage is not within specifications, check and repair harness of faulty connector contact between main fuse and control unit. If voltage is within specifications, check voltage across pin No. 8 of control unit and vehicle ground.
Voltage should be 10 volts minimum when key is inserted into ignition switch. If voltage is not within specifications, check and replace faulty ignition switch. Check and replace harness or faulty connector contact between fuse block and control unit.
If voltage is within specifications, check voltage across pin No. 7 and vehicle ground. Voltage should be 10 volts minimum when ignition switch is set to ACC position. If voltage is not within specifications, check and repair harness or faulty connector contact between ignition switch and control unit.
If voltage is within specifications, disconnect harness connector from control unit. Check resistance between pins No. 9 and No. 11 of connector B69/R47. If resistance is 8 ohms or greater, key lock solenoid circuit is open. Check and repair harness or faulty connector contact between key lock solenoid and control unit.
If resistance is less than 4 ohms, key lock solenoid is shorted. Check and repair harness or faulty connector contact between key lock solenoid and control unit. After repairs are completed, recheck solenoid operation. If malfunction is still present, replace shift lock control unit.
Check resistance between pin No. 11 of connector B69/R47 and vehicle ground. If resistance is 1k/ohm minimum, replace shift lock control unit.