Toyota ZZT230 series, Руководство по ремонту

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Dl-250
DTC P0770
-
Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The
ECM
uses the signals from the throttle position sensor, air-flow meter and crankshaft position sensor
to monitor the engagement condition of the lock-up clutch.
Then the
ECM compares the engagement condition of the 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 or automatic transaxle (clutch, brake or gear etc.).
OTGNo. OTC Detecting Condition Trouble Area
• Lock-up does not occur when driving in the lock-up range
(normal driving at 80 kmlh !50 mph)), or lock-up remains ON
•
Shift solenoid valve SL is stuck open or closed
P0770
in the lock-up OFF range.
• Valve body blocked up or stuck
(2--lrip detection logic) •lock-up clutch
• When lock-up is ON, clutch or brake slips or gear is broken. • Automatic transaxle (clutch, brake or gear etc.)
(2--lrip detection logic)
INSPECTION PROCEDURE
N
1
Check solenoid valve
SL
operation
007&69
PREPARATION:
(a) Remove the oil pan.
(b) Remove the 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 positive voltage is supplied to the shift sole­
noid valve, check that the solenoid valve opens.
OK:
(a) Solenoid valve does leak air.
(b)
Solenoid valve opens.
G
Replace the solenoid valve SL.