Toyota ZZT230 series, Repair Manual

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Dl-244
TRANSAXLE
DTC
P0750, P0755
Shift Solenoid AlB Malfunction
(Shift Solenoid Valve No. 1 /No. 2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st. 2nd, 3rd or 0/D
gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
trouble of the shift solenoid valves and valve body.
OTC No.
DTC
Detecting Condition Trouble Alea
P0750
During normal drfvlng, the gear requlr&d by the
ECM
does
not
•
Shift solenoid valve No. 1/No. 2 is stud< open or closed
P0755
match the actual gear
•
Valve body is blocked up or stuck
(2--trip detection
HINT:
Check the shift solenoid valve No. 1 when DTC P0750 is output and check the shift solenoid valve No. 2
when DTC P0755 is output.
INSPECTION PROCEDURE
N
1
Check shift solenoid valve No.
1
or No.
2
operation.
"'"''
PREPARATION:
(a)
Remove the oil pan.
(b) Remove the shift solenoid valve No. 1 or No. 2.
CHECK:
(a)
By applying 490 kPa (5 kgflcm'. 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 valve opens.
OK:
(a) Solenoid valve does not leak air.
(b) Solenoid valve opens.
Replace the shift solenoid valve No.
1
or No. 2.
"·- - --