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Shift Solenoid E Malfunction

This document provides diagnostic information for a P0770 DTC code indicating a malfunction with the shift solenoid "E". It describes the system, the detecting condition for the DTC, and potential trouble areas. The inspection procedure involves checking the operation of the shift solenoid valve SL by applying compressed air and voltage to check for leaks or proper opening. If the solenoid valve checks out, the next steps are to check the valve body and replace the torque converter clutch if needed.

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Jonn Sim-One
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1K views2 pages

Shift Solenoid E Malfunction

This document provides diagnostic information for a P0770 DTC code indicating a malfunction with the shift solenoid "E". It describes the system, the detecting condition for the DTC, and potential trouble areas. The inspection procedure involves checking the operation of the shift solenoid valve SL by applying compressed air and voltage to check for leaks or proper opening. If the solenoid valve checks out, the next steps are to check the valve body and replace the torque converter clutch if needed.

Uploaded by

Jonn Sim-One
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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DI-190

DIAGNOSTICS - AUTOMATIC TRANSMISSION


DI0SW-15

DTC P0770 Shift Solenoid ”E” Malfunction

SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air-
flow meter and crankshaft position sensor to monitor the en-
gagement condition of the lock-up clutch.
Then the ECM compares the engagement condition of the
Line Drain
Pressure lock-up clutch with the lock-up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SL,
valve body and torque converter clutch.
D00076

DTC No. DTC Detecting Condition Trouble Area


Lock-up does not occur when driving in the lock-up range  Shift solenoid valve SL is stuck open or closed
P0770 (normal driving at 80 km/h [50 mph]), or lock-up remains ON  Valve body blocked up or stuck
in the lock-up OFF range (2 trip detection logic).  Lock-up clutch
HINT:
Check the shift solenoid valve SL when DTC P0770 (Shift Solenoid ”E” Malfunction) is output.

INSPECTION PROCEDURE

1 Check solenoid valve SL operation.

PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve SL.
(+) (-)
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve does not leak air.
(b) When battery voltage is supplied to the shift solenoid
(+) (-)
valve, check that the solenoid valve opens.
Q08219
Q08226 D00087 OK:
(a) Solenoid valve does not leak air.
(b) Solenoid valve opens.

NG Replace the solenoid valve SL.

OK

2002 4RUNNER (RM887U)

Author: Date: 366


DI-191
DIAGNOSTICS - AUTOMATIC TRANSMISSION

2 Check valve body (See page DI-175 ).

NG Repair or replace the valve body.

OK

Replace the torque converter clutch


(See page AT-18 and AT-22 ).

2002 4RUNNER (RM887U)

Author: Date: 367

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