5A
DTC P0974 / P0977 (No.21 / 23): Shift Solenoid-A (No.1) Control Circuit High/Shift Solenoid-B (No.2) Control Circuit High
Wiring Diagram
1. TCM 4. A/T
2. Shift solenoid valve-A (No.1) [A]: Terminal arrangement of TCM connector (M13 engine model with VVT) (viewed from harness side)
3. Shift solenoid valve-B (No.2) [B]: Terminal arrangement of TCM connector (M13 engine model without VVT) (viewed from harness side)
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
Voltage of shift solenoid valve TCM terminal is high although TCM is commanding shift solenoid to turn OFF.
• Shift solenoid valve circuit open or shorted to power circuit.
• Malfunction of shift solenoid valve
• TCM
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 DTC in TCM memory.
3) Start engine shift select lever to “D” range.
4) Start vehicle and increase vehicle speed until gear position reaches 3rd or 4th gear.
5) Decrease vehicle speed and stop vehicle.
6) Check DTC.
Troubleshooting
Step Action YES NO
1
Was A/T System Check performed?
Go to Step 2.
Go to A/T System Check .
2
Check Shift Solenoid Valve Circuit for IG Short
1) Connect valve body harness connector.
2) Disconnect TCM connectors.
3) Check for proper connection to TCM at terminal “E121-16” [A] or “E123-4” [B] (for shift solenoid valve-A (No.1)) or “E121-15” [A] or “E123-3” [B] (for shift solenoid valve-B (No.2)).
4) If connection is OK, turn ignition switch ON and measure voltage between terminal “E121-16” [A] or “E123-4” [B] (for shift solenoid valve-A (No.1)) or “E121-15” [A] or “E123-3” [B] (for shift solenoid valve-B (No.2)) of disconnected harness side TCM connector and ground.
Is it 0 – 2 V?
Go to Step 3.
DTC P0974: “RED/GRN” circuit shorted to power circuit.
DTC P0977: “YEL/GRN” circuit shorted to power circuit.
3
Check Shift Solenoid Valve Resistance
1) Turn ignition switch OFF.
2) Disconnect valve body harness connector (1) on automatic transmission (4).
3) Check for proper connection to solenoid at “RED/GRN” (for shift solenoid valve-A (No.1) (2)) or “YEL/GRN” (for shift solenoid valve-B (No.2) (3)) circuit.
Check resistance of solenoid valve.
Resistance of shift solenoid valve
Resistance between shift solenoid valve-A (No.1) terminal and transmission: 11 – 15 Ω at 20 °C (68 °F)
Resistance between shift solenoid valve-B (No.2) terminal and transmission: 11 – 15 Ω at 20 °C (68 °F)
Is check results satisfactory?
Intermittent trouble or faulty TCM. Check for intermittent referring to Intermittent and Poor Connection Inspection . If OK, substitute a known-good TCM and recheck.
Replace applicable shift solenoid valve or valve body harness.