Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - AB60F AUTOMATIC TRANSMISSION / TRANSAXLE
INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE S1)
CHECK HARNESS AND CONNECTOR (NO. 1 TRANSMISSION WIRE - ECM)
INSPECT SHIFT SOLENOID VALVE S1
DTC P0973 Shift Solenoid "A" Control Circuit Low (Shift Solenoid Valve S1)
DTC P0974 Shift Solenoid "A" Control Circuit High (Shift Solenoid Valve S1)
DESCRIPTION
Shifting from 1st to 6th is performed in combination with ON and OFF operation of the 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 current to the open or short circuited solenoid ().
| DTC Code | DTC Detection Condition | Trouble Area |
| P0973 | The ECM detects a short in the solenoid valve S1 circuit 2 times when the solenoid valve S1 is operated (1 trip detection logic). | Short in shift solenoid valve S1 circuit Shift solenoid valve S1 ECM |
| P0974 | The ECM detects an open in the solenoid valve S1 circuit 2 times when the solenoid valve S1 is not operated (1 trip detection logic). | Open in shift solenoid valve S1 circuit Shift solenoid valve S1 ECM |
MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve S1 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 the shift solenoid valve S1 is ON, if its resistance is 8 Ω or less, the ECM determines there is a short in the shift solenoid valve S1 circuit.
When the shift solenoid valve S1 is OFF, if its resistance is 100 kΩ or higher, the ECM determines there is an open in the shift solenoid valve S1 circuit ().
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- The shift solenoid valve S1 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 S1 | OFF | ON | ON | ON | ON | ON |
| 1.INSPECT NO. 1 TRANSMISSION WIRE (SHIFT SOLENOID VALVE S1) |
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 8 (S1) - Body ground 20°C (68°F) 11 to 15 Ω
| *a | Component without harness connected (No. 1 Transmission Wire) |
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| OK | |
| 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:
for LHD Tester Connection Condition Specified Condition C45-7 (S1) - Body ground 20°C (68°F) 11 to 15 Ω for RHD Tester Connection Condition Specified Condition C46-7 (S1) - Body ground 20°C (68°F) 11 to 15 Ω
| *1 | for LHD |
| *2 | for RHD |
| *a | Front view of wire harness connector (to ECM) |
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| OK | ||
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| 3.INSPECT SHIFT SOLENOID VALVE S1 |
Remove the shift solenoid valve S1.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Shift solenoid valve S1 connector terminal - Shift solenoid valve S1 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 S1 connectorBattery negative (-) → Shift solenoid valve S1 bodyValve moves and makes an operating noise
| *a | Component without harness connected (Shift Solenoid Valve S1) |
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| OK | ||
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