Mitsubishi Montero (2002-2004). Manual — part 730
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-617
STEP 7. Check the accelerator pedal position switch.
(1) Disconnect the accelerator pedal position switch connector
D-138.
(2) Check the continuity between accelerator pedal position
switch side connector terminal No. 4 and No. 5.
Standard value:
Continuity (foot released from accelerator pedal)
Non-continuity (accelerator pedal depressed)
Q: Is the switch operating properly?
YES : Go to Step 8.
NO : Replace the accelerator pedal position sensor. Then
go to Step 11.
STEP 8. Check connector D-133 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 11.
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
6 7 8
1 2 3 4 5
AK201453AB
ACCELERATOR PEDAL
POSITION SWITCH
SIDE CONNECTOR
AK200939
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AB
CONNECTOR: D-133
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-133(GR)
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-618
STEP 9. Check for short circuit to ground between
accelerator pedal position switch connector D-138
(terminal No. 4) and PCM connector D-133 (terminal No.
38).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 11.
STEP 10. Using scan tool MB991502, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2126 set?
YES : Replace the PCM.Then go to Step 11.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
AK200945
3
4
5
1
2
8
6
7
AB
CONNECTOR: D-138
HARNESS
CONNECTOR:
COMPONENT SIDE
D-138(GR)
AK200939
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AB
CONNECTOR: D-133
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-133(GR)
ACX01539
16-PIN
MB991502
AC
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-619
STEP 11. Using scan tool MB991502, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2126 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P2127: Accelerator Pedal Position Sensor (Sub) Circuit Low Input
ACX01539
16-PIN
MB991502
AC
AK201164
GREEN-YELLO
W
GREEN-ORANGE
BLA
CK
5 V
97
8
ACCELERATOR
PEDAL
POSITION
SENSOR
(SUB)
POWERTRAIN CONTROL MODULE (PCM)
107
96
6
7
Accelerator Pedal Position Sensor (Sub) Circuit
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
D-138
(MU802073)
6 7 8
1 2 3 4 5
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-620
.
CIRCUIT OPERATION
• A 5-volt power supply is applied on the APS (sub)
power terminal (terminal No. 8) from the PCM
(terminal No. 97).
The ground terminal (terminal No. 7) is grounded
with PCM (terminal No. 96).
• When the accelerator pedal is moved from the
idle position to the fully opened position, the
resister between the APS (sub) output terminal
(terminal No. 6) and ground terminal will increase
according to the rotation.
.
TECHNICAL DESCRIPTION
• The APS (sub) outputs voltage which corre-
sponds to the accelerator pedal depression.
• The PCM checks whether the voltage is within a
specified range.
.
DTC SET CONDITIONS
Check Conditions
• Ignition switch "ON" position.
Judgement Criteria
• APS2 output voltage is 0.2 volts or less for 1 sec-
ond.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• APS failed or maladjusted.
• Open or shorted APS (sub) circuit, or loose con-
nector.
• PCM failed.
AK200944
ACCELERATOR
PEDAL
POSITION
SENSOR
AB
D-138(GR)
CONNECTOR: D-138
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
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