DI−27
DIAGNOSTICS − AUTOMATIC TRANSMISSION (A45DE)
DI3NH−03
DTC 62, 63 No. 1, No. 2 Solenoid Valve Circuit Malfunc-
tion
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ON and OFF of the No. 1 and No. 2 solenoid valves
controlled by Engine & ECT ECU. If an open or short circuit occurs in either of the solenoid valves, the Engine
& ECT ECU controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly (Fail
safe function).
NO. 1 SOLENOID NO. 2 SOLENOID BOTH SOLENOIDS MAL-
NORMAL MALFUNCTIONING MALFUNCTIONING FUNCTIONING
Range
Solenoid valve Solenoid valve Solenoid valve Gear when shift selector is
Gear Gear Gear manually operated
No. 1 No. 2 No. 1 No. 2 No. 1 No. 2
ON OFF 1st X ON 3rd ON X 1st O/D
ON ON 2nd X ON 3rd OFF X O/D O/D
D
OFF ON 3rd X ON 3rd OFF X O/D O/D
OFF OFF O/D X OFF O/D OFF X O/D O/D
ON OFF 1st X ON 3rd ON X 1st 3rd
2 ON ON 2nd X ON 3rd OFF X 3rd 3rd
OFF ON 3rd X ON 3rd OFF X 3rd 3rd
ON OFF 1st X OFF 1st ON X 1st 1st
L
ON ON 2nd X ON 2nd ON X 1st 1st
X: Malfunctions
HINT:
Check the No. 1 solenoid valve when DTC 62 is output and check the No. 2 solenoid valve when DTC 63
is output.
DTC No. DTC Detecting Condition Trouble Area
The Engine & ECT ECU checks for an open or short circuit in
the No. 1 or No. 2 solenoid valve circuit when it changes.
The Engine & ECT ECU records DTC 62 or 63 if condition (a)
or (b) is detected once, but it does not blink the O/D OFF indi-
cator light.
After Engine & ECT ECU detects condition (a) or (b) continu-
S Open or short in No. 1/No. 2 solenoid valve circuit
ously 8 times or more in one−trip, it causes the O/D OFF indi-
62, 63 S No. 1/No. 2 solenoid valve
cator light light up until condition (a) or (b) disappears.
S Engine & ECT ECU
After that, if the Engine & ECT ECU detects condition (a) or (b)
once, it starts lighting up O/D OFF indicator light again.
(a) Solenoid resistance is 8 W or less (short circuit) when the
solenoid is energized.
(b) Solenoid resistance is 100 kW or more (open circuit) when
the solenoid is not energized.
Fail safe function:
If either of the solenoid valve circuits develops an open or short, the Engine & ECT ECU turns the other sole-
noid valve ON and OFF to shift to the gear positions shown in the table above. The Engine & ECT ECU also
turns the SL solenoid valve OFF at the same time. If both solenoids malfunction, hydraulic control cannot
be performed electronically and must be done manually.
Manual shifting as shown in the above table must be done (In the case of a short circuit, the Engine & ECT
ECU stops sending current to the short circuited solenoid).
HIACE SUP (RM670E)
DI−28
DIAGNOSTICS − AUTOMATIC TRANSMISSION (A45DE)
WIRING DIAGRAM
ECT Solenoid Engine & ECT ECU
No. 1
Solenoid Valve
11 13 7
W 1 GR GR GR
ED4 BG4 E6 S1
No. 2
Solenoid Valve
10 5 6
B 2 L−Y ED4 L−Y L−Y E6 S2
BG4
D04736
INSPECTION PROCEDURE
1 Measure resistance between terminal S1 or S2 of Engine & ECT ECU and body
ground.
PREPARATION:
Disconnect the connector from the Engine & ECT ECU.
CHECK:
Measure resistance between terminal S1 or S2 of the Engine
& ECT ECU and body ground.
OK:
S1 S2 Resistance: 11 − 15 W at 20 ˚C (68 ˚F)
D02632
OK Check and replace the Engine & ECT ECU (See
page IN−30).
NG
HIACE SUP (RM670E)
DI−29
DIAGNOSTICS − AUTOMATIC TRANSMISSION (A45DE)
2 Check harness and connector between Engine & ECT ECU and automatic trans-
mission solenoid connector.
PREPARATION:
Disconnect the solenoid connector from the automatic trans-
mission.
CHECK:
S1 Check the harness and connector between terminal S1 or S2
of the Engine & ECT ECU and terminal S1 or S2 of solenoid
S1 S2 connector.
S2
OK:
There is no open and short circuit.
D02633
Q05336 D04727
NG Repair or replace the harness or connector (See
page IN−30).
OK
HIACE SUP (RM670E)
DI−30
DIAGNOSTICS − AUTOMATIC TRANSMISSION (A45DE)
3 Check No. 1 or No. 2 solenoid valve.
Electrical Check:
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the solenoid connector.
(d) Remove the No. 1 & No. 2 solenoid valve.
CHECK:
(+) (−) (a) Measure resistance between the solenoid connector and
D02840 solenoid body.
(b) Connect positive lead of the battery to terminal of sole-
noid connector, negative lead of the battery to the sole-
noid body.
OK:
(1) Resistance: 11 − 15 W at 20 ˚C (68 ˚F)
(2) The solenoid makes an operating noise
Mechanical Check:
PREPARATION:
(+) (−) (a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the solenoid connector.
(d) Remove the No. 1 & No. 2 solenoid valve.
(+) (−) CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
D02841 check that the solenoid valve does not leak air.
(b) When battery voltage is supplied to the solenoid valve,
check that the valve opens.
OK:
(1) Solenoid valve does not leak air
(2) Solenoid valve opens
NG Replace the solenoid valve.
OK
Repair or replace the solenoid wire.
HIACE SUP (RM670E)
