DTC Troubleshooting: P0758 (8-1)

DTC P0758:  Problem in Shift Solenoid Valve B Circuit

NOTE: Record all freeze data before you troubleshoot.

1.Turn the ignition switch OFF.

2.Disconnect the battery negative terminal.

3.Disconnect PCM connectors A (31P) and C (22P).

4.Reconnect the battery negative terminal.

5.Turn the ignition switch ON (II).

6.Measure the voltage between PCM connector terminals C4 and A23 or A24.

 

Is there voltage?


YES - Repair short to power in the wire between PCM connector terminal C4 and the shift solenoid valve B.n


NO - Go to 7.


7.Turn the ignition switch OFF.

8.Disconnect the shift solenoid harness connector at the transmission housing.

9.Check for continuity between PCM connector terminals C4 and A23 or A24.

 

Is there continuity?


YES - Repair short to ground in the wire between PCM connector terminal C4 and the shift solenoid harness connector.n


NO - Go to 10.


10.Connect the shift solenoid harness connector.

11.Measure the resistance between PCM connector terminals C4 and A23 or A24.

 

Is there 12-25 W?


YES - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good  PCM and recheck.n


NO - Go to 12.

12.Disconnect the shift solenoid harness connector.

13.Check for continuity between PCM connector terminal C4 and No. 2 terminal of the shift solenoid harness connector.

 

Is there continuity?


YES - Check the shift solenoid valve B, and check for an open in the shift solenoid harness in the transmission.n


NO - Repair open in the wire between PCM connector terminal C4 and the shift solenoid harness connector.n