Dtc P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve St). Corolla ZZE150

Трансмиссия. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Автоматическая Трансмиссия U341E. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TRANSMISSION WIRE (ST)

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

INSPECT SHIFT SOLENOID VALVE (ST)

DTC P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve ST)

DTC P0788 Shift / Timing Solenoid High (Shift Solenoid Valve ST)


DESCRIPTION

Shift solenoid valve ST is switched ON-OFF by a signal from ECM so that let in or out timing of 2nd brake is adjusted by operating orifice control valve. Therefore, shift solenoid valve ST operates when letting in or out reverse clutch.
If the shift solenoid valve ST is broken, the shift shock becomes big.

DTC No.
DTC Detection Condition
Trouble Area
P0787
ECM detects short in solenoid valve ST circuit 2 times when solenoid valve ST is operated (1-trip detection logic)
  1. Short in shift solenoid valve ST circuit
  2. Shift solenoid valve ST
  3. ECM
P0788
ECM detects open in solenoid valve ST circuit 2 times when solenoid valve ST is not operated (1-trip detection logic)
  1. Open in shift solenoid valve ST circuit
  2. Shift solenoid valve ST
  3. ECM

MONITOR DESCRIPTION

The ECM commands gearshift by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and the MIL comes on. Illuminating the MIL, the ECM performs the fail-safe and turns the other shift solenoid valves in good condition "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.).

WIRING DIAGRAM


COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve St)


INSPECTION PROCEDURE

1.INSPECT TRANSMISSION WIRE (ST)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve St)

  1. Disconnect the transmission wire connector from the transaxle.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 - Body ground
    		20°C (68°F)
    		11 to 15 Ω


NG
Перейдите к шагу 3
OK


2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve St)

  1. Connect the transmission connector to the transaxle.

  1. Disconnect the connector from the ECM.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B31-80 (ST) - Body ground
    		20°C (68°F)
    		11 to 15 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (for 2ZR-FE) (Нажмите здесь)

3.INSPECT SHIFT SOLENOID VALVE (ST)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Автоматическая Трансмиссия U341E.Система Автоматической Трансмиссии. Dtc P0787 Shift / Timing Solenoid Low (Shift Solenoid Valve St)

  1. Remove the shift solenoid valve ST.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Solenoid Connector (ST) - Solenoid Body (ST)
    		20°C (68°F)
    		11 to 15 Ω

  1. Connect the positive (+) lead to the terminal of solenoid connector, and the negative (-) lead to the solenoid body.

    Standard:
    The solenoid makes an operating noise.


NG
REPLACE SHIFT SOLENOID VALVE (ST) (Нажмите здесь)
OK

REPAIR OR REPLACE TRANSMISSION WIRE (Нажмите здесь)