Page 4044 of 4264
7A2-52 DIAGNOSIS (JR405E)
Gear Position & Shift Solenoid Operation
Range TCM terminal
Gear B8
(High clutch
solenoid) B9
(Low clutch
solenoid) B7
(2-4 brake
solenoid) B6
(Low & reverse
brake solenoid)
P
R Reverse
N
D, 3, 2 1st
2nd
3rd
4th
L 1st
2nd
3rd
4th
: On (Operated)
: Off (Not operated)
Setting Condition:
The 2-4 brake duty solenoid signal is open circuit or short circuit.
(The voltage different from the output ON/OFF signals was detected while the TCM monitors the solenoid output
voltage.)
Fail Safe:
When the vehicle is running, the operation of the 2-4 brake duty solenoid and the lock-up solenoid is stopped
(OFF), the gear position selected at the trouble detection is held, and the lock-up is inhibited.
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
2-4 brake duty solenoid malfunction.
Open (Off) circuit or short (On) circuit of the 2-4 brake duty solenoid.
Open circuit, short circuit to battery or short circuit to ground of the harness between 2-4 brake duty solenoid
terminal 9 and TCM terminal B7 (C95).
Insufficient ground condition of the 2-4 brake duty solenoid.
Poor connection of each connector.
Page 4047 of 4264
DIAGNOSIS (JR405E) 7A2-55
Gear Position & Shift Solenoid Operation
Range TCM terminal
Gear B8
(High clutch
solenoid) B9
(Low clutch
solenoid) B7
(2-4 brake
solenoid) B6
(Low & reverse
brake solenoid)
P
R Reverse
N
D, 3, 2 1st
2nd
3rd
4th
L 1st
2nd
3rd
4th
: On (Operated)
: Off (Not operated)
Setting Condition:
The high clutch duty solenoid signal is open circuit or short circuit.
(The voltage different from the output ON/OFF signals was detected while the TCM monitors the solenoid output
voltage.)
Fail Safe:
When the vehicle is running, the operation of the high clutch duty solenoid and the lock-up solenoid is stopped
(OFF), the gear position selected at the trouble detection is held, and the lock-up is inhibited.
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
High clutch duty solenoid malfunction.
Open (Off) circuit or short (On) circuit of the high clutch duty solenoid.
Open circuit, short circuit to battery or short circuit to ground between high clutch duty solenoid terminal 10 and
TCM terminal B8 (C95).
Insufficient ground condition of the high clutch duty solenoid.
Poor connection of each connector.
Page 4050 of 4264
7A2-58 DIAGNOSIS (JR405E)
Gear Position & Shift Solenoid Operation
Range TCM terminal
Gear B8
(High clutch
solenoid) B9
(Low clutch
solenoid) B7
(2-4 brake
solenoid) B6
(Low & reverse
brake solenoid)
P
R Reverse
N
D, 3, 2 1st
2nd
3rd
4th
L 1st
2nd
3rd
4th
: On (Operated)
: Off (Not operated)
Setting Condition:
The low clutch duty solenoid signal is open circuit or short circuit.
(The voltage different from the output ON/OFF signals was detected while the TCM monitors the solenoid output
voltage.)
Fail Safe:
When the vehicle is running, the operation of the low clutch duty solenoid and the lock-up solenoid is stopped
(OFF), the gear position selected at the trouble detection is held, and the lock-up is inhibited.
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
Low clutch duty solenoid malfunction.
Open (Off) circuit or short (On) circuit harness of the low clutch duty solenoid.
Open circuit, short circuit to battery or short circuit to ground between low clutch duty solenoid terminal 3 and
TCM terminal B9 (C95).
Insufficient ground condition of the low clutch duty solenoid.
Poor connection of each connector.
Page 4052 of 4264
7A2-60 DIAGNOSIS (JR405E)
DTC P0748 (Flash Code 35) Line Pressure Solenoid Failure
Control Valve
TCM
B17
B23
BLK
Lock-up Solenoid
Terminal
Assembly
VIO
Line Pressure Solenoid
E54 (4)
(6)H23 (14)
(6)C95 (17)
(23)
BLK
VIO
Setting Condition:
The line pressure solenoid signal is open circuit or short circuit.
(The voltage different from the output ON/OFF signals was detected while the TCM monitors the solenoid output voltage.)
Fail Safe:
The operation of the line pressure solenoid is stopped (OFF).
Possible Cause:
Line pressure solenoid malfunction.
Line pressure solenoid harness open (Off) circuit or short (On) circuit.
Open circuit, short circuit to battery or short circuit to ground between line pressure solenoid terminal 6 and TCM
terminal B23 (C95).
Insufficient ground condition of the line pressure solenoid.
Poor connection of each connector.
Page 4054 of 4264
7A2-62 DIAGNOSIS (JR405E)
DTC P1860 (Flash Code 36) Lock-up Duty Solenoid Failure
Control Valve
TCM
B17
B23
BLK
Lock-up Solenoid
Terminal
Assembly
VIO
Line Pressure Solenoid
E54 (4)
(6)H23 (14)
(6)C95 (17)
(23)
BLK
VIO
Setting Condition:
The lock-up duty solenoid signal is open circuit or short circuit.
(The voltage different from the output ON/OFF signals was detected while the TCM monitors the solenoid output voltage.)
Fail Safe:
The lock-up is inhibited.
Possible Cause:
Lock-up duty solenoid malfunction.
Open (Off) circuit or short (On) circuit of the lock-up duty solenoid.
Open circuit, short circuit to battery or short circuit to ground between lock-up duty solenoid terminal 4 and TCM
terminal B17 (C95).
Insufficient ground condition of the lock-up duty solenoid.
Poor connection of each connector.
Page 4055 of 4264
DIAGNOSIS (JR405E) 7A2-63
Reference:
When the lock-up duty solenoid is operated, following signal is outputted.
Measurement terminal: B17 (C95) and B5 (C95)
-AC range by circuit tester: Approximately 2.2 – 9.0V at Lock-up / Approximately 1.0 – 2.0 V at Unlock-up
-Oscilloscope: Following wave form can be found.
Lock-up Duty Solenoid Reference Wave Form
Measurement Terminal: B17 (+) B5 (-)
Measurement Scale: 10V/div 5ms/div
Measurement Condition: Lock-up condition
0V
Lock-up Duty Solenoid Reference Wave Form
Measurement Terminal: B17 (+) B5 (-)
Measurement Scale: 10V/div 5ms/div
Measurement Condition: Unlock-up condition
0V
Page 4070 of 4264
7A2-78 DIAGNOSIS (JR405E)
DTC P1750 (Flash Code 51) Low & Reverse Brake Fail-safe Valve Failure
Low & Reverse Brake Fail Valve (B)Control Valve Upper Body
Low & Reverse Brake Fail Valve (A)Control Valve Lower Body
Setting Condition:
When the oil pressure generated and low & reverse brake pressure switch operates off/on twice, the TCM
detected an operation failure of the low & reverse brake fail-safe valve in D, 3, 2, L range.
Fail Safe:
When the vehicle is running, the gear position selected at the trouble detection is held and the lock-up is
inhibited.
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
Stick of low & reverse brake fail-safe valve.
Low & reverse brake pressure switch does not turn on.
Short circuit to ground of harness low & reverse brake pressure switch.
Poor connection of each connector of harness in low & reverse brake pressure switch.
Page 4072 of 4264
7A2-80 DIAGNOSIS (JR405E)
DTC P1755 (Flash Code 52) 2-4 Brake Fail-safe Valve Failure
Control Valve Upper Body2-4 Brake Fail Valve (B)
Control Valve Lower Body2- 4 Br ake Fai l Val ve ( A)
Setting Condition:
When the oil pressure generated and 2-4 brake pressure switch operates off/on twice, the TCM detected an
operation failure of the low & reverse brake fail-safe valve in D, 3, 2, L range.
Fail Safe:
When the vehicle is running, the gear position selected at the trouble detection is held and the lock-up is
inhibited.
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
Stick of 2-4 brake fail-safe valve.
2-4 brake pressure switch does not turn on.
Short to ground of harness 2-4 brake pressure switch.
Faulty fitting of each connector of harness in 2-4 brake pressure switch.
