Over Drive (O/D) Switch Circuit Troubleshooting

1.Turn the ignition switch OFF.

2.Disconnect the O/D switch/shift lock solenoid/park pin switch connector.

3.Check for continuity between the No. 5 and No. 6 terminals of the O/D switch/shift lock solenoid/park pin switch connector while pushing the O/D switch and when the switch released.

 

Is there ocntinuity while pushing the O/D switch, and no continuity when the switch released?


YES - Go to 4.


NO - Replace the O/D switch.n


4.Turn the ignition switch ON (II).

5.Shift to [D] position.

6.Measure the voltage between the No. 5 and No. 6 terminals of the O/D switch/shift lock solenoid/park pin switch connector.

 

Is there about 5 V?


YES - O/D switch circuit is OK.n


NO - Go to 7.

7.Measure the voltage between No. 6 terminal and body ground.

 

Is there about 5 V?


YES - Repair open in the wire between the No. 5 terminal of the O/D switch/shift lock solenoid/park pin switch connector and ground ( G451), or repair poor ground (G451).n


NO - Go to 8.


8.Measure the voltage between PCM connector terminal D2 and body ground.

 

Is there about 5 V?


YES - Repair open or short in the wire between PCM connector terminal D2 and O/D switch/shift lock solenoid/park pin switch connector.n


NO - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good  PCM and recheck.n