Mitsubishi Pajero Pinin. Manual — part 179
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-26
INSPECTION PROCEDURE 16
Stop lamp switch system
Probable cause
If large shocks occur during squat control, the cause is probably a problem with
the stop lamp switch.
D
Malfunction of stop lamp switch
D
Malfunction of harness or connector
D
Malfunction of A/T-ECU
MUT-
II
SERVICE DATA
D
28 – Stop lamp switch
OK: ON when the brake pedal is
depressed and OFF when the
brake pedal is released
OK
Check the stop lamp switch
(Refer to GROUP 35 – Brake Pedal)
NG
Check the following connectors:
<L.H. drive vehicles> C-04, C-02, C-29,
C-24, D-02, D-04
<R.H. drive vehicles> C-04, C-02, C-41,
D-02, D-04
NG
Repair
OK
Check the harness wire between the
stop lamp switch and the A/T-ECU.
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-27
SERVICE DATA REFERENCE TABLE
Item
No.
Inspection item
Inspection conditions
Normal value
13
Accelerator
pedal position
sensor (throttle
Engine: Idle
Selector lever position: N
Accelerator pedal: Fully
released
0 – 5 %
sensor (throttle
opening voltage)
Accelerator pedal: Depressed
Gradually rises from
the above value
Accelerator pedal: Fully
depressed (up to 2 seconds)
85 – 100 %
14
Accelerator
pedal position
Ignition switch: ON
Engine: Stopped
Ignition switch: ON
Approx. 5 V
edal osition
sensor (power
supply voltage)
Engine: Sto
ed
Ignition switch: OFF
0 V
15
A/T fluid
temperature
sensor
Driving with engine
warmed up
Drive for 15 minutes or more
until the A/T fluid temperature is
70 – 90
_
C.
Gradually increases
to 70 – 90
_
C
22
Wide open
throttle switch
Accelerator pedal position
Released
OFF
throttle switch
Depressed
ON
27
Shift position
signal
Accelerator pedal: Fully
released
Engine: Idle (Vehicle
stopped)
Selector lever position: N
Brake pedal: Depressed
Shifting from N to D
1st
→
3rd
→
1st
Selector lever position: L
Idle (Vehicle stopped)
1st
Selector lever position: 2
Idle (Vehicle stopped)
1st
Driving at 40 km/h (20 seconds
or more)
2nd
Selector lever position: D
Overdrive switch: OFF
Driving at constant speed of 50
km/h (20 seconds or more)
3rd
Selector lever position: D
Overdrive switch: OFF
Driving at constant speed of 50
km/h (20 seconds or more)
4th
28
Stop lamp switch
Ignition switch: ON
Engine: Stopped
Brake pedal: Depressed
ON
Engine: Stopped
Brake pedal: Released
OFF
31
Input shaft speed
sensor
Selector lever position: D
Overdrive switch: OFF
Driving at constant speed of 50
km/h
1,800 – 2,000 r/min
32
Output shaft
speed sensor
Selector lever position: D
Overdrive switch: OFF
Driving at constant speed of 50
km/h
1,800 – 2,000 r/min
35
Overdrive switch
Ignition switch: ON
Engine: Stopped
Overdrive switch: OFF
OD-OFF
Engine: Stopped
Overdrive switch: ON
OD
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-28
Item
No.
Inspection item
Inspection conditions
Normal value
37
Inhibitor switch
Ignition switch: ON
Engine: Stopped
Selector lever position: P
P, R, D
Engine: Stopped
Selector lever position: R
P, R, D
Selector lever position: N
N
Selector lever position: D
P, R, D
Selector lever position: 2
2
Selector lever position: L
L
38
Vehicle speed
sensor
Selector lever
position: L, D
Overdrive switch: OFF
Idling in 1st gear (Vehicle
stopped)
0 r/min
Overdrive switch: OFF
Driving at constant speed of 50
km/h (3rd gear)
450 – 550 r/min
41
Solenoid valve
No. 1
Selector lever position: D
Overdrive switch: ON
Driving at constant speed of 5
km/h (1st gear)
ON
Driving at constant speed of 50
km/h (4th gear)
OFF
43
Solenoid valve
No. 2
Selector lever position: D
Overdrive switch: OFF
Driving at constant speed of 5
km/h (1st gear)
OFF
Driving at constant speed of 50
km/h (3rd gear)
ON
47
Solenoid valve
No. 3
Selector lever position: D
Overdrive switch: ON
Driving at constant speed of 5
km/h (1st gear)
OFF
Driving at constant speed of 50
km/h (4th gear)
ON
53
N range switch
Ignition switch: ON
Engine: Stopped
Selector lever position: N
ON
Engine: Stopped
Selector lever position: Other
than N
OFF
55
2 range switch
Selector lever position: 2
ON
Selector lever position: Other
than 2
OFF
56
L range switch
Selector lever position: L
ON
Selector lever position: Other
than L
OFF
61
Free-wheeling
engage switch
Ignition switch: ON
Engine: Stopped
Transfer lever position: Other
than 4WD
4WD
Transfer lever position: 4WD
2WD
63
Dual-pressure
switch
Engine: Stopped
Selector lever position: N
A/C switch: ON
ON
switch
Selector lever position: N
A/C switch: OFF
OFF
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-29
REFERENCE FOR FAIL-SAFE/BACKUP FUNCTIONS
When malfunctions of the main sensors or actuators are detected by the diagnosis system, the vehicle
is controlled by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning item
Control contents during malfunction
Output shaft speed
sensor
If there is an open circuit in the output shaft speed sensor, upshifting to 4th gear and lockup
control is stopped.
Inhibitor switch
If there is an open circuit in the N, 2 or L signal line, driving is possible in the case of 2 and L
(same as D range) so that control can be performed as if the range is D range, and driving is
not possible in N range. If more than one of the N, 2 or L signals are input, the order of priority
for control is L
→
2
→
N.
Accelerator pedal
position sensor
If the output is 0.335 V or less or 4.8 V or more during idling condition, gear shifting control when
throttle is fully closed is carried out.
Solenoid valve No. 3
If a problem is detected, lockup is stopped over the whole range and the solenoid is turned off
to prevent the engine from stalling during idling.
Solenoid valve No. 1,
No. 2
If a problem is detected, each solenoid stops operating and is turned off. The gear shifting logic
when a problem is detected is given in the table below
Selector le-
ver
position
Normal
When the solenoid
valve No. 1 has broken
When the solenoid
valve No. 2 has broken
When the solenoid
valves No. 1 and No. 2
have broken
Gear
S1
S2
Gear
S1
S2
Gear
S1
S2
Gear
S1
S2
D
1
f
×
3
×→
f
1
f
O/D
2
f
f
3
f
O/D
f
→×
O/D
3
×
f
3
f
O/D
×
O/D
O/D
×
×
O/D
×
O/D
×
O/D
2
1
f
×
3
×→
f
1
f
3
2
f
f
3
f
3
f
→×
3
3
×
f
3
f
3
×
3
L
1
f
×
1
×
1
f
1
2
f
f
2
f
1
f
1
f
: Energized (ON)
×
: Not energized (OFF)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст