Dtc P076C Shift Solenoid H Stuck On

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ae80F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

SYSTEM DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (IN ADDITION TO DTC P076C)

INSPECT SHIFT SOLENOID VALVE SC1 AND SC2

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

DTC P076C Shift Solenoid "H" Stuck On


SYSTEM DESCRIPTION

Based on signals from the transmission revolution sensors (NT and SP2), the actual gear is detected.
If the detected gear is different than the commanded gear, the TCM detects related mechanical problems in the shift solenoid valves, transmission valve body assembly and automatic transmission assembly (clutch, brake, gear, etc.).

HINT:
Actual gear when a malfunction occurs in shift solenoid valve SC1 (without fail-safe control):

TCM commanded gear
1st
2nd
3rd
4th
5th
6th
7th
8th
Actual gear during SC1 stuck ON malfunction
1st
(5th)*
2nd
3rd
4th
5th
6th
7th
8th
*: Shift lever in S with the S1 (1st gear) range selected

DTC No.
DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P076C
  1. Battery voltage is 9.5 V or higher, engine speed is more than 400 rpm, and the vehicle is driven with S1 range (1st gear) (no malfunctions are detected in shift solenoid valve SC1, SC2, SL1, SL2, SL3, SL4, SL5, SLT, SLU, park/neutral position switch assembly, TCM, electronic throttle, knock control sensor, No. 1 ATF temperature sensor, transmission revolution sensors (NT), and CAN communication system)
  2. When gear shifts to 1st (S1 range) are requested by TCM, actual gear changes to 5th gear.
  3. Malfunction status is detected 5 times per trip
  4. 2 trip detection logic
  1. Shift solenoid valve SC1
  2. Shift solenoid valve SC2
  3. Transmission valve body assembly
  4. Automatic transmission assembly (clutch, brake, gear, etc.)

MONITOR DESCRIPTION

This DTC indicates a "stuck ON" malfunction of the shift solenoid valve SC1.
The TCM commands gear shifts by turning the shift solenoid valves on or off. When the gear commanded by the TCM and the actual gear are not the same, the TCM stores a DTC.

INSPECTION PROCEDURE

NOTICE:
Perform registration and/or initialization when parts related to the automatic transmission are replaced (Click here).
HINT:
After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
  1. While driving the vehicle, move the shift lever to S, select the S1 (1st gear) range and perform an engine brake test (Click here).*1
  2. Turn the engine switch off.
  3. Perform step (*1) again.
  4. Check for DTCs again (Click here).
1.CHECK DTC OUTPUT (IN ADDITION TO DTC P076C)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Powertrain / ECT / Trouble Codes.

  1. Read the DTCs using the GTS.

    Result
    Result
    		Proceed to
    DTC P076C and DTC P0746, P076B, P0776, P0796, P08CD, P08CE, P2714, P2808 and/or P2817 are output
    		A
    Only DTC P076C is output
    DTCs other than P0746, P076B, P076C, P0776, P0796, P08CD, P08CE, P2714, P2808 and P2817 are also output
    		B
    HINT:
    If DTCs other than P0746, P076B, P076C, P0776, P0796, P08CD, P08CE, P2714, P2808 and P2817 are output, perform troubleshooting for those DTCs first.


B
GO TO DTC CHART (Click here)
A


2.INSPECT SHIFT SOLENOID VALVE SC1 AND SC2


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Ae80F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P076C Shift Solenoid H Stuck On

  1. Remove the shift solenoid valve SC1 and SC2 (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Terminal of shift solenoid valve SC1 connector - Shift solenoid valve SC1 body
    		20°C (68°F)
    		11 to 15 Ω
    Terminal of shift solenoid valve SC2 connector - Shift solenoid valve SC2 body
    		20°C (68°F)
    		11 to 15 Ω

  1. 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
    1. Battery positive (+) → Shift solenoid valve connector
    2. Battery negative (-) → Shift solenoid valve body
    		Valve moves and makes an operating noise
Text in Illustration
*1
Shift Solenoid Valve SC1
*2
Shift Solenoid Valve SC2


NG
REPLACE SHIFT SOLENOID VALVE SC1 OR SC2 (Click here)
OK


3.INSPECT TRANSMISSION VALVE BODY ASSEMBLY

  1. Check the transmission valve body assembly (Click here).

    OK:
    There is no foreign matter on each valve and they operate smoothly.


NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY (Click here)
OK

REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY (Click here)