Mitsubishi Montero (2004+). Manual — part 920
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-255
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 42 (P0732)>
.
DTC SET CONDITIONS <DTC 42 (P0732)>
Check Conditions
• Engine speed: 450 r/min or more.
• Output speed: 500 r/min or more.
• Shift stage: 2nd gear.
• Input speed: more than 0 r/min.
• Transmission fluid temperature sensor voltage:
4.5 volts or less.
• Voltage of battery: 10 volts or more.
Yes
No
No
N
E
:
Engine speed
START
Yes
No
Transmission fluid temperature
sensor voltage < 4.5 V
There is only one transmission
range switch signal
Yes
N
E
> 450 r/min
N
OPG-B
> 500 r/min
N
IPG-A
> 0 r/min
Continuous failure for 4 secs.
Good
END
N
OPG-B
: Output speed
(output shaft speed sensor)
No
Yes
No
No
Yes
No
Yes
Yes
Malfunction
Shift change is finished
N
IPG-A
: Input speed
(input shaft speed sensor)
I
2
: 2nd g
ear ratio
AC205244
Timer start
Timer > 2 secs.
Voltage of battery > 10 V
Shift stage commanded
by A/T ECM is 2nd
No
Yes
Yes
No
I
2
× N
OPG-B
- 200 < N
IPG-A
< I
2
× N
OPG-B
+ 200
AB
Shift stage commanded
by PCM is 2nd
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-256
• Transmission range switch rationality: only one
signal.
• Time after shift changing finish: 2 seconds or
more.
Judgement Criteria
• Output speed: [(input speed + 200 r/min) / 2nd
gear ratio] or more. (4 seconds)
• Output speed: [(input speed - 200 r/min) / 2nd
gear ratio] or less. (4 seconds)
• If DTC 42 (P0732) is set consecutively four times,
the transmission is locked into 3rd gear as a
fail-safe measure, and the "N" range light flashes
once per second.
.
OBD-II DRIVE CYCLE PATTERN <DTC 42
(P0732)>
Start the engine, and drive at 30 km/h (19 mph) or
more for 10 seconds, with 2nd gear fixed (2nd gear
in sport mode).
.
DESCRIPTIONS OF MONITOR METHODS <DTC
43 (P0733)>
In 3rd gear, if a difference between turbine revolution
and that value calculated from output revolution
equals or exceeds specified value, PCM judges that
step-out in 3rd gear has occurred.
.
MONITOR EXECUTION <DTC 43 (P0733)>
Continuous
.
MONITOR EXECUTION CONDITIONS (OTHER
MONITOR AND SENSOR) <DTC 43 (P0733)>
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch
malfunction
• DTC 22 (P0715): Input shaft speed sensor mal-
function
• DTC 23 (P0720): Output shaft speed sensor mal-
function
• DTC 36 (P0743): Torque converter clutch sole-
noid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunc-
tion
• DTC 32 (P0758): Underdrive solenoid malfunc-
tion
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 35 (P0773): Reduction solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction
Sensor (The sensor below is determined to be
normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• Reduction solenoid
• A/T control relay
.
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-257
LOGIC FLOW CHARTS (Monitor Sequence) <DTC 43 (P0733)>
.
DTC SET CONDITIONS <DTC 43 (P0733)>
Check Conditions
• Engine speed: 450 r/min or more.
• Output speed: 900 r/min or more.
• Shift stage: 3rd gear.
• Input speed: more than 0 r/min.
• Transmission fluid temperature sensor voltage:
4.5 volts or less.
• Voltage of battery: 10 volts or more.
Yes
No
No
N
E
:
Engine speed
START
Yes
No
Transmission fluid temperature
sensor voltage < 4.5 V
There is only one transmission
range switch signal
Yes
N
E
> 450 r/min
N
OPG-B
> 900 r/min
N
IPG-A
> 0 r/min
Continuous failure for 4 secs.
Good
END
N
OPG-B
: Output speed
(output shaft speed sensor)
No
Yes
No
No
Yes
No
Yes
Yes
Malfunction
Shift change is finished
N
IPG-A
: Input speed
(input shaft speed sensor)
I
3
: 3rd g
ear ratio
AC205245
Timer start
Timer > 2 secs.
Voltage of battery > 10 V
Shift stage commanded
by A/T ECM is 3rd
No
Yes
Yes
No
I
3
× N
OPG-B
- 200 < N
IPG-A
< I
3
× N
OPG-B
+ 200
AB
Shift stage commanded
by PCM is 3rd
AUTOMATIC TRANSMISSION DIAGNOSIS
TSB Revision
AUTOMATIC TRANSMISSION
23A-258
• Transmission range switch rationality: only one
signal.
• Time after shift changing finish: 2 seconds or
more.
Judgement Criteria
• Output speed: [(input speed + 200 r/min) / 3rd
gear ratio] or more. (4 seconds)
• Output speed: [(input speed - 200 r/min) / 3rd
gear ratio] or less. (4 seconds)
• If DTC 43 (P0733) is set consecutively four times,
the transmission is locked into 3rd gear as a
fail-safe measure, and the "N" range light flashes
once per second.
.
OBD-II DRIVE CYCLE PATTERN <DTC 43
(P0733)>
Start the engine, and drive at 40 km/h (25 mph) or
more for 10 seconds, with 3rd gear fixed (3rd gear in
sport mode).
.
DESCRIPTIONS OF MONITOR METHODS <DTC
44 (P0734)>
In 4th gear, if a difference between turbine revolution
and that value calculated from output revolution
equals or exceeds specified value, PCM judges that
step-out in 4th gear has occurred.
.
MONITOR EXECUTION <DTC 44 (P0734)>
Continuous
.
MONITOR EXECUTION CONDITIONS (OTHER
MONITOR AND SENSOR) <DTC 44 (P0734)>
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• DTC 27, 28 (P0705): Transmission range switch
malfunction
• DTC 22 (P0715): Input shaft speed sensor mal-
function
• DTC 23 (P0720): Output shaft speed sensor mal-
function
• DTC 36 (P0743): Torque converter clutch sole-
noid malfunction
• DTC 31 (P0753): Low-reverse solenoid malfunc-
tion
• DTC 32 (P0758): Underdrive solenoid malfunc-
tion
• DTC 33 (P0763): Second solenoid malfunction
• DTC 34 (P0768): Overdrive solenoid malfunction
• DTC 35 (P0773): Reduction solenoid malfunction
• DTC 54 (P1751): A/T control relay malfunction
Sensor (The sensor below is determined to be
normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Torque converter clutch solenoid
• Low-reverse solenoid
• Underdrive solenoid
• Second solenoid
• Overdrive solenoid
• Reduction solenoid
• A/T control relay
.
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