TC1 - Enter Output State Diagnostic Mode: Check Transmission

DTC 0743 indicates TCC electrical malfunction.
DTC 0750 indicates SS1 electrical malfunction.
DTC 0755 indicates SS2 electrical malfunction.
DTC 1746 indicates EPC circuit open.
DTC 1747 indicates EPC circuit shorted.

Possible Causes:
- Solenoid assembly damaged.
- PCM damaged.
- VPWR circuit open or shorted to GND.
- Solenoid circuit open or, shorted to VPWR or GND.

- Key Off.

- Disconnect transmission connector.

- Using a mirror, inspect both ends of the connector for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Disconnect electrical connector on the speed control servo, if equipped.

- Connect DVOM positive test lead to the VPWR circuit and negative test lead to the transmission solenoid circuit at the transmission vehicle harness connector.

- Key On, Engine Off.

- Turn on Scan Tool outputs with the trigger button.

- Observe transmission solenoid voltage reading on the DVOM and record.

- Cycle the Scan Tool trigger button on and off several times.

- Does the transmission solenoid circuit cycle 0.5 volts or greater on the DV0M?

YES -- REFER to Transmission and Drivetrain/Automatic Transmission/Drivetrain for internal harness and solenoids.

NO -- GO to TC2. TC2 - Check VPWR to Solenoid