Dtc P0976 Shift Solenoid B Control Circuit Low (Shift Solenoid Valve S2)
Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
DESCRIPTION
MONITOR DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE S2)
CHECK HARNESS AND CONNECTOR (NO. 1 TRANSMISSION WIRE - ECM)
INSPECT SHIFT SOLENOID VALVE S2
DTC P0976 Shift Solenoid "B" Control Circuit Low (Shift Solenoid Valve S2) |
DTC P0977 Shift Solenoid "B" Control Circuit High (Shift Solenoid Valve S2) |
DESCRIPTION
Shifting from 1st to 6th is performed in combination with ON and OFF operation of shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR, which are controlled by the ECM. If an open or short circuit occurs in any of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated safely. Also, the ECM stops sending the current to the open or short circuited solenoid (Click here). DTC Code
| DTC Detection Condition
| Trouble Area
|
P0976
| ECM detects a short in the solenoid valve S2 circuit 2 times when solenoid valve S2 is operated (1 trip detection logic).
| - Short in shift solenoid valve S2 circuit
- Shift solenoid valve S2
- ECM
|
P0977
| ECM detects an open in the solenoid valve S2 circuit 2 times when solenoid valve S2 is not operated (1 trip detection logic).
| - Open in shift solenoid valve S2 circuit
- Shift solenoid valve S2
- ECM
|
MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve S2 circuit. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem, illuminates the MIL and stores the DTC. When shift solenoid valve S2 is ON, if its resistance is 8 Ω or less, the ECM determines there is a short in the shift solenoid valve S2 circuit.When shift solenoid valve S2 is OFF, if its resistance is 100 kΩ or more, the ECM determines there is an open in the shift solenoid valve S2 circuit (Click here).
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Shift solenoid valve S2 is turned ON/OFF normally when the shift lever is in D.
ECM gear shift command
| 1st
| 2nd
| 3rd
| 4th
| 5th
| 6th
|
Shift solenoid valve S2
| ON
| ON
| OFF
| OFF
| OFF
| ON
|
| 1.INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE S2) |
Disconnect the No. 1 transmission wire connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
15 (S2) - Body ground
| 20°C (68°F)
| 11 to 15 Ω
|
Text in Illustration*a
| Component without harness connected
(No. 1 Transmission Wire)
|
| 2.CHECK HARNESS AND CONNECTOR (NO. 1 TRANSMISSION WIRE - ECM) |
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
C45-6 (S2) - Body ground
| 20°C (68°F)
| 11 to 15 Ω
|
Text in Illustration*a
| Front view of wire harness connector
(to ECM)
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.INSPECT SHIFT SOLENOID VALVE S2 |
Remove the shift solenoid valve S2.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
Shift solenoid valve S2 connector terminal - Shift solenoid valve S2 body
| 20°C (68°F)
| 11 to 15 Ω
|
Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.
- OK:
Measurement Condition
| Specified Condition
|
- Battery positive (+) → Shift solenoid valve S2 connector
- Battery negative (-) → Shift solenoid valve S2 body
| Valve moves and makes an operating noise
|
Text in Illustration*a
| Component without harness connected
(Shift Solenoid Valve S2)
|
| OK |
|
|
|
| REPAIR OR REPLACE NO. 1 TRANSMISSION WIRE (Click here) |
|
