Power Steering Pressure (PSP) Switch
- Start engine. Using a voltmeter, measure voltage (backprobe) between ground and the specified PCM harness connector terminal with the steering wheel in the specified positions. Refer to the PSP SWITCH VOLTAGE
table. If reading is as specified, signal circuit is okay. If reading is not as specified, go to next step.
PSP SWITCH VOLTAGE
| Application |
PCM Connector/Terminal No. |
Volts |
| Straight |
B/15 |
10-14 |
| Turned To Stop |
B/15 |
0-1 |
- Turn ignition off. Disconnect wire connector from PSP switch on power steering pump. Turn ignition on. Measure voltage between ground and PSP switch signal wire at connector. If reading is 10-14 volts, replace PSP switch. If reading is not as specified, check for an open or short to ground in signal wire. Repair as necessary. If wire is okay, replace PCM. Retest system.