Mitsubishi Pajero Pinin. Manual — part 188
AUTOMATIC TRANSMISSION –
General/Troubleshooting <A/T>
23-2
GENERAL
OUTLINE OF CHANGES
The following service procedures for items which are different from before have been established to correspond
to the following changes:
The A/T-ECU has been changed.
The shift pattern has been changed.
TROUBLESHOOTING <A/T>
SHIFT PATTERN
D range (Overdrive switch: ON)
Throttle opening (%)
100
80
0
1,000
2,000
3,000
4,000
5,000
6,000
Output shaft speed r/min
0
50
100
150
Vehicle speed km/h
2
3
4
60
40
20
1
2
1
3
2
3
4
3
2
INSPECTION CHART FOR DIAGNOSIS CODE
Code
Diagnosis item
Reference page
13
Accelerator pedal position sensor system
(Throttle opening voltage)
Sensor malfunction/
open circuit/short circuit
23-3
14
Accelerator pedal position sensor system
(Throttle power supply voltage)
Open circuit/short circuit
23-3
15
A/T fluid temperature sensor system
Open circuit
23-4
16
A/T fluid temperature sensor system
Short circuit
23-4
22
Wide open throttle system
Open circuit/short circuit
23-4
29
Inhibitor switch system
Open circuit
23-5
30
Inhibitor switch system
Short circuit
23-5
31
Input shaft speed sensor system
Open circuit
23-6
32
Output shaft speed sensor system
Open circuit
23-6
38
Vehicle speed sensor system
Open circuit
23-7
41
Solenoid valve No. 1 system
Open circuit
23-8
42
Solenoid valve No. 1 system
Short circuit
23-8
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-3
Code
Reference page
Diagnosis item
43
Solenoid valve No. 2 system
Open circuit
23-8
44
Solenoid valve No. 2 system
Short circuit
23-8
47
Solenoid valve No. 3 system
Open circuit
23-8
48
Solenoid valve No. 3 system
Short circuit
23-8
55
Abnormal communication with engine-ECU
Open circuit
23-9
INSPECTION PROCEDURES FOR DIAGNOSIS CODES
Code No. 13, 14 Accelerator pedal position sensor (APS)
Probable cause
If the APS output voltage (APS opening voltage) is 4.8 V or higher when the engine
is idling, the output voltage is judged to be too high and diagnosis code No. 13
is output. If the APS output voltage (APS opening voltage) is 0.335 V or lower
when the engine is idling, the output voltage is judged to be too low and diagnosis
code No. 13 is output.
If the APS output voltage (APS power supply voltage) is 3.0 V or lower or if it
is 5.7 V or higher when the engine is idling, the APS is judged to be faulty and
diagnosis code No. 14 is output.
Malfunction of the accelerator pedal position sensor
Malfunction of harness or connector
Malfunction of the A/T-ECU
*: Refer to ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
Accelerator pedal position sensor check
(Refer to GROUP 13A – On-vehicle Service.)*
NG
Replace
OK
Check the following connectors:
<L.H. drive vehicles> C-46, C-25, D-34, D-46
<R.H. drive vehicles> C-46, C-26, D-34, D-46
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.
NG
Repair
OK
Harness check
Between accelerator pedal position sensor and A/T-ECU
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-4
Code No. 15, 16 A/T fluid temperature sensor system
Probable cause
If the A/T fluid temperature sensor output is 10
C or less (5.6 k
Ω
or more) even
after running the engine for 15 minutes or more, it is judged that there is an open
circuit in the A/T fluid temperature sensor and diagnosis code No. 15 is output.
If the A/T fluid temperature sensor output is 240
C or more (10 k
Ω
or less), it is
judged that there is a short circuit in the A/T fluid temperature sensor and diagnosis
code No. 16 is output.
Malfunction of the A/T fluid temperature sensor
Malfunction of harness or connector
Malfunction of the A/T-ECU
*: Refer to ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
A/T fluid temperature sensor check (Refer to P.23-43.)*
NG
Replace
OK
Check the following connectors: B-03, D-45
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.
NG
Repair
OK
Harness check
Between A/T fluid temperature sensor and A/T-ECU
Code No. 22 Wide open throttle switch system
Probable cause
If the wide open throttle switch dose not turn OFF with the accelerator pedal is
not depressed, there is a short circuit in the wide open throttle switch and diagnosis
code No. 22 is output.
Malfunction of the wide open throttle switch
Malfunction of harness or connector
Malfunction of the A/T-ECU
*: Refer to ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
NG
Replace
OK
NG
OK
NG
Repair
OK
Replace the A/T-ECU.
Wide open throttle switch check (Refer to P.23-51).*
Harness check
Between the wide open throttle switch and the A/T-ECU
connectors, and repair if necessary.
Check the following connectors: C-58, D-34, D-46
OK
Measure at wide open throttle switch connector C-58.
Disconnect the connector and measure at the harness side.
Voltage between terminal 1 and earth
(ignition switch: ON)
OK: System voltage
NG
Repair
OK
Check the following connector: D-46
OK
Check the trouble symptoms.
Check the trouble symptoms.
NG
Repair
OK
Harness check
Between the wide open throttle switch and the A/T-ECU
connectors.
AUTOMATIC TRANSMISSION –
Troubleshooting <A/T>
23-5
Code No. 29, 30 Inhibitor switch system
Probable cause
If the inhibitor switch has not sent any signal for 2 seconds while the ignition switch
is on, it is judged that there is an open circuit in the inhibitor switch and diagnosis
code No.29 is set.
If the inhibitor switch has sent at least two signals simultaneously for 2 seconds
while the ignition switch is on, it is judged that there is an short circuit in the inhibitor
switch and diagnosis code No.30 is set.
Malfunction of the inhibitor switch
Malfunction of harness or
Malfunction of the A/T-ECU
*: Refer to ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
OK
End
NG
NG
OK
NG
Repair
NG
Check the ignition switch. (Refer to GROUP 54 - ignition switch.)*
MUT
ĆII
SERVICE DATA
37 Inhibitor switch
OK: The MUT-II should display a correct selector lever posi-
tion.
OK
Measure at inhibitor switch connector B-04.
Disconnect the connector and measure at the harness side.
Voltage between terminal 8 and earth
(ignition switch: ON)
OK: System voltage
NG
Repair
OK
Check the following connectors: D-02, C-26, C-74, C-78
OK
Check the trouble symptoms.
Check the trouble symptoms.
NG
Repair
OK
Harness check
Between the inhibitor switch and the ignition switch
Replace
Inhibitor switch check (Refer to P.23-37).*
NG
Repair
OK
Check the following connectors: B-04, D-46
Replace the A/T-ECU.
OK
NG
Harness check
Between the inhibitor switch and the A/T-ECU
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