Mitsubishi Pajero Pinin. Manual - part 175

 

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Mitsubishi Pajero Pinin. Manual - part 175

 

 

AUTOMATIC TRANSMISSION – 

Troubleshooting <A/T>

23-10

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

OK

Replace the A/T

-

ECU.

OK

Check the trouble symptoms.

NG

Check the harness wire between accel-
erator pedal position sensor and
A/T-ECU.

Accelerator pedal position sensor
check (Refer to GROUP 13A – On-ve-
hicle Service.)

NG

Check the following connectors:
<L.H. drive vehicles> C-46, C-25, D-34,
D-04
<R.H. drive vehicles> C-46, C-26, D-34,
D-04

NG

Replace

Repair

Repair

OK

NG

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

 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 

 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

OK

Replace the A/T

-

ECU.

OK

Check the trouble symptoms.

Check the harness wire between A/T
fluid temperature sensor and A/T-ECU.

A/T fluid temperature sensor check 
(Refer to P.23-43.)

NG

Check the following connectors:
B-03, D-04

NG

Replace

Repair

Repair

OK

NG

AUTOMATIC TRANSMISSION – 

Troubleshooting <A/T>

23-11

Code No. 22 Wide open throttle switch system

Probable cause

If the wide open throttle switch does not turn OFF when the accelerator pedal is
not depressed, there is a short circuit in the wide open throttle switch and diagnosis
code No. 25 is output.

D

Malfunction of wide open throttle switch

D

Malfunction of connector

D

Malfunction of the A/T-ECU

Check the harness between the wide
open throttle switch and A/T-ECU con-
nectors, and repair if necessary.

NG

Check the trouble symptoms.

Replace the A/T-ECU

NG

NG

Check the harness between the wide
open throttle switch and A/T-ECU con-
nectors.

Repair

OK

Check trouble symptom.

Measure at wide open throttle switch
connector C-58.

D

Disconnect the connector and
measure at the harness side.

D

Voltage between terminal 1 and
earth (ignition switch: ON)
OK

System voltage

Check the following connector:
D-04

Wide open throttle switch inspection
j(Refer to P.23-51.)

NG

NG

Replace

Repair

OK

NG

OK

NG

Repair

Check the following connectors:
C-58, D-34, D-04

OK

OK

Code No. 31, 32 Input shaft speed sensor system, output
shaft speed sensor system

Probable cause

If no output pulse is detected from the input shaft speed sensor for 120 seconds
or more while driving in 3rd gear at a speed of 60 km/h or more, there is judged
to be an open circuit in the input shaft speed sensor and diagnosis code No. 31
is output.
If no output pulse is detected from the output shaft speed sensor for 120 seconds
or more while driving in 3rd gear at a speed of 60 km/h or more, there is judged
to be an open circuit in the output shaft speed sensor and diagnosis code No.
32 is output.

D

Malfunction of the input shaft speed sensor or output
shaft speed sensor

D

Malfunction of harness or connector

D

Malfunction of the sensor rotor

D

Malfunction of A/T

-

ECU

D

Electrical noise

L

: Refer to the Transmission Workshop Manual.

Eliminate a source of electrical noise.

NG

OK

Check the trouble symptoms.

Check the trouble symptoms.

NG

Repair

NG

OK

Replace the A/T

-

ECU.

NG

Check the sensor rotor.

K

OK

Check the harness wire between input
shaft speed sensor, output shaft speed
sensor and A/T-ECU.

NG

Input shaft speed sensor and output
shaft speed sensor check (Refer to
P.23-41, 42.)

NG

Replace the input shaft speed sensor
and output shaft speed sensor.

Check the following connectors:
D-04, B-03

OK

Replace

OK

Check the trouble symptoms.

Repair

AUTOMATIC TRANSMISSION – 

Troubleshooting <A/T>

23-12

Code No. 38 Vehicle speed sensor system

Probable cause

If no output pulse is detected from the vehicle speed sensor for 120 seconds or
more continuously while driving at a speed of 60 km/h or more, there is judged
to be an open circuit in the vehicle speed sensor and diagnosis code No. 38 is
output.

D

Malfunction of the vehicle speed sensor

D

Malfunction of harness or connector

D

Malfunction of the A/T

-

ECU

D

Malfunction of the ignition switch

Check the trouble symptoms.

OK

Replace the A/T

-

ECU.

Replace the A/T

-

ECU.

NG

OK

Check the trouble symptoms.

OK

NG

Repair

Check the ignition switch. (Refer to
GROUP 54.)

OK

OK

Check the trouble symptoms.

OK

Check the following connectors:
B-08, D-02, D-04

NG

Check the harness wire between
vehicle speed sensor and earth, and
repair if necessary.

Measure at the vehicle speed sensor
connector B-08.

D

Disconnect the connector and
measure at the harness side.

(1) Voltage between 1 and earth

(Ignition switch: ON)
OK: System voltage

(2) Voltage between 3 and earth

(Ignition switch: ON)
OK: 4.8 – 5.2 V

(3) Continuity between 2 and earth

OK: Continuity

(1) NG

Check the following connectors:
<L.H. drive vehicles> D-02, C-38, C-02,
C-76, C-74
<R.H. drive vehicles> D-02, C-41, C-76,
C-74

NG

Repair

Vehicle speed sensor check (Refer to
GROUP 54 – Combination meter.)

OK

NG

Replace

OK

NG

Repair

NG

Check the harness wire between
A/T-ECU and vehicle speed sensor.

Repair

NG

Check the harness wire between igni-
tion switch and vehicle speed sensor.

Check the following connectors:
D-02, D-04

NG

Repair

NG

Check the harness wire between
A/T-ECU and vehicle speed sensor.

Repair

(2) NG

(3) NG

AUTOMATIC TRANSMISSION – 

Troubleshooting <A/T>

23-13

Code No. 41, 42 Solenoid valve No.1 system

Probable cause

If the resistance value for a solenoid valve No.1 is too large, it is judged that there
is an open circuit in the solenoid valve No.1 and the diagnosis code No.41 is output.
If the resistance value for a solenoid valve No.1 is too small, it is judged that there
is a short-circuit in the solenoid valve No.1 and the diagnosis code No.42 is output.

D

Malfunction of solenoid valve No.1

D

Malfunction of harness or connector

D

Malfunction of the A/T-ECU

Solenoid valve No.1 check (Refer to P.23-42.)

NG

Replace

OK

Check the following connectors: B-03, D-04

NG

Repair

OK

Check the harness wire between A/T-ECU and solenoid valve
No.1.

NG

Repair

Check the trouble symptoms.

NG

Replace the A/T-ECU.

OK

Code No. 43, 44 Solenoid valve No.2 system

Probable cause

If the resistance value for a solenoid valve No.2 is too large, it is judged that there
is an open circuit in the solenoid valve No.2 and the diagnosis code No.43 is output.
If the resistance value for a solenoid valve No.2 is too small, it is judged that there
is a short-circuit in the solenoid valve No.2 and the diagnosis code No.44 is output.

D

Malfunction of solenoid valve No.2

D

Malfunction of harness or connector

D

Malfunction of the A/T-ECU

Solenoid valve No.2 check (Refer to P.23-42.)

NG

Replace

OK

Check the following connectors: B-03, D-04

NG

Repair

OK

Check the harness wire between A/T-ECU and solenoid valve
No.2.

NG

Repair

Check the trouble symptoms.

NG

Replace the A/T-ECU.

OK

Code No. 47, 48 Solenoid valve No.3 system

Probable cause

If the resistance value for a solenoid valve No.3 is too large, it is judged that there
is an open circuit in the solenoid valve No.3 and the diagnosis code No.47 is output.
If the resistance value for a solenoid valve No.3 is too small, it is judged that there
is a short-circuit in the solenoid valve No.3 and the diagnosis code No.48 is output.

D

Malfunction of solenoid valve No.3

D

Malfunction of harness or connector

D

Malfunction of the A/T-ECU

Solenoid valve No.3 check (Refer to P.23-42.)

NG

Replace

OK

Check the following connectors: B-03, D-04

NG

Repair

OK

Check the harness wire between A/T-ECU and solenoid valve
No.3.

NG

Repair

Check the trouble symptoms.

NG

Replace the A/T-ECU.

OK

 

 

 

 

 

 

 

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