P0974

DTC P0974 / P0977: Shift Solenoid "A" Control Circuit High / Shift Solenoid "B" Control Circuit High

Wiring Diagram

Refer to P0973 DTC P0973 / P0976: Shift Solenoid "A" Control Circuit Low / Shift Solenoid "B" Control Circuit Low.

DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and shift select lever to "D" range.
4) Start vehicle and increase vehicle speed to 60 km/h (37 mile/h) in "D" range.
5) Keep on driving in the speed for 20 seconds and decrease vehicle speed gradually.
6) Stop vehicle.
7) Check DTC, pending DTC and freeze-frame data.

DTC Troubleshooting

1.
Was "A/T System Check" performed?
YES -
Go to Step 2.
NO -
Go to A/T System Check A/T System Check.

2. Check shift solenoid valve circuit for power supply short

Disconnect TCM connectors.
Check for proper connection to TCM at terminal "E92-16" (for shift solenoid valve-A), "E92-15" (for shift solenoid valve-B).
If connection is OK, turn ignition switch ON and measure voltage between terminal "E92-16" (for shift solenoid valve-A), "E92-15" (for shift solenoid valve-B) of disconnected harness side TCM connector and ground.

Is it 0 - 2 V?
YES -
Go to Step 3.
NO -
DTC P0974: Shift solenoid valve-A circuit is shorted to power supply circuit.
DTC P0977: Shift solenoid valve-B circuit is shorted to power supply circuit.

3. Check solenoid valve circuit for open

Check continuity between terminal "E92-16" (for shift solenoid valve-A) or "E92-15" (for shift solenoid valve-B) of disconnected harness side TCM connector and ground.

Is it infinity?
YES -
- DTC P0974: Shift solenoid valve-A circuit is open circuit.
- DTC P0977: Shift solenoid valve-B circuit is open circuit.
- If circuit is OK, go to Step 4.
NO -
Go to Step 4.

4. Check solenoid valve

Check solenoid valve referring to Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Inspection Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Inspection.

Is check results satisfactory?
YES -
Intermittent trouble or faulty TCM. Check for intermittent trouble referring to Intermittent and Poor Connection Inspection Intermittent and Poor Connection Inspection. If OK, substitute a known-good TCM and recheck.
NO -
Replace defective solenoid valve referring to Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Removal and I Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Removal and Installation.