Q08221
Q08220
D00081
(+)
(
−
)
(+) (
−
)
Air
DI
−
156
−
DIAGNOSTICS
AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC
P0750, P0755
Shift Solenoid A/B 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 O/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.
DTC No.
DTC Detecting Condition
Trouble Area
P0750
P0755
During normal driving, the gear required by the ECM does not
match the actual gear (2 trip detection logic)
S
Shift solenoid valve No. 1/No. 2 is stuck open or closed
S
Valve body is blocked up or stuck
HINT:
Check the shift solenoid valve No. 1 when DTC P0750 is output and check shift solenoid valve No. 2 when
DTC P0755 is output.
INSPECTION PROCEDURE
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)
Applying 490 kPa (5 kgf/cm
2
, 71 psi) of compressed air,
check that the shift solenoid valve does not leak air.
(b)
When battery positive voltage is supplied to the shift sole-
noid valves, check they opens.
NG
Replace shift solenoid valve No. 1 or No. 2.
OK
2
Check valve body (See page
DI
−
147
).
NG
Repair or replace valve body.
OK
Repair transmission (See page
AT
−
18
).
DI5KM
−
02
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Brought to you by BirfMark
Version 1.00 - 12/21/2010
