DTC 23

DTC P0974 / P0977 (No.21 / No.23): Shift Solenoid-A (No.1) Control Circuit High / Shift Solenoid-B (No.2) Control Circuit High

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

WARNING:

- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and tester, on a level road.

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 selector lever to "D" range.
4) Start vehicle and increase vehicle speed to 80 km/h (50 mile/h) in "D" range.
5) Keep on driving in the speed for 10 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.

2. Check shift solenoid valve circuit for IG short

Turn ignition switch OFF and disconnect TCM connectors.
Check for proper connection to TCM at terminal "G08-4" or "G08-3" of TCM connector.
If OK, turn ignition switch ON and measure voltage between terminal "G08-4" or "G08-3" of disconnected harness side TCM connector and ground.

Is it 0 - 2 V?
YES
Go to Step 3.
NO
"GRY" or "GRN/ORN" circuit shorted to power circuit.

3. Check shift solenoid valve resistance

Turn ignition switch OFF.
Disconnect valve body harness connector (1) on transaxle (4).
Check for proper connection to solenoid at "GRY" or "GRN/ORN" circuit.
Check resistance of solenoid. See Fig.

Resistance of shift solenoid valve
Between shift solenoid valve-A (No. 1) terminal (2) and transaxle: 12 - 16 ohms at 20 °C (68 °F)
Between shift solenoid valve-B (No. 2) terminal (3) and transaxle: 12 - 16 ohms at 20 °C (68 °F)





Is check result satisfactory?
YES
Go to Step 4.
NO
Replace shift solenoid valve or lead wire.

4. Check shift solenoid circuit for open

Connect valve body harness connector.
Measure resistance between terminal "G08-4" or "G08-3" of disconnected harness side TCM connector and ground.

Is it 11 - 15 ohms (at 20 °C (68 °F))?
YES
Intermittent trouble or faulty TCM. Check for intermittent referring to Intermittent and Poor Connection Inspection. If OK, substitute a known-good TCM and recheck.
NO
"GRY" or "GRN/ORN" circuit open.