Mitsubishi Montero (2002-2004). Manual — part 946
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
23Ac-267
STEP 5. Check transfer-ECU connector E-109 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
STEP 6. Using scan tool MB991502, check data list item 09:
Ignition switch power supply.
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) Set scan tool MB991502 to data reading mode for item 09,
Ignition Switch Power Supply.
• The voltage should equal battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage equal battery positive voltage?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
− How to Cope with
Intermittent Malfunction
NO : Replace the transfer-ECU.
AC204176
CONNECTOR : E-109
BB
11 12
25
24
13
26
9
22
7
6
20
19
8
21
10
23
5
4
17
2
1
15
14
3
16
18
ACX01539AD
MB991502
16-PIN
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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DTC 13: Main Relay System (Inside of ECU)
.
CIRCUIT OPERATION
The power supplied from the ignition switch is distrib-
uted to each part of ECU through the main relay
located inside of ECU.
.
DTC SET CONDITIONS
When the voltage at main relay OFF is 6 volts and
over, or the voltage at main relay ON is 6 volts and
less, the DTC 13 is set as the main relay malfunction.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)
• Malfunction of the transfer-ECU
DIAGNOSIS
Replace the transfer-ECU.
Q: Is the malfunction eliminated?
YES : The procedure is complete. (If no malfunction is not
found an intermittent malfunction is suspected. Refer
to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
− How to Cope with
Intermittent Malfunction
NO : Replace the PCM.
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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DTC 21: Accelerator Pedal Position Sensor System
AC205258AB
Accelrator Pedal Position Sensor System Circuit
AC204681AB
CONNECTOR: D-135
D-135 (GR)
91 92
93
101
94 95
96 97 98 99 100
102103
104
105106
107108 109
110 111112
113114
115116 117
118 119120
AC203914
AD
STEERING
SHAFT
CONNECTOR : D-138
D-138 (GR)
1
3
2
4
6
5
7 8
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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.
CIRCUIT OPERATION
• When the throttle valve shaft rotates from the idle
position to the fully opened position, the resis-
tance between the accelerator pedal position
sensor output terminal (terminal 6) and ground
terminal (terminal 7) will increase according to
the rotation.
• With the ignition switch in the "ON" position. Volt-
age at pin 5 increases from approximately 0.7
volt at closed throttle, to approximately 5 volts at
wide open throttle.
.
DTC SET CONDITIONS
If accelerator pedal position sensor output voltage is
0.2 volt or lower at times other than when the engine
is idling, the output is judged to be too low and DTC
21 is set.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Malfunction of the accelerator pedal position sen-
sor circuit
• Damaged harness, connector
• Malfunction of the transfer-ECU
AC204194
CONNECTORS : E-109, E-114
BH
11 12
25
24
13
26
9
22
7
6
20
19
8
21
10
23
5
4
17
2
1
15
14
3
16
18
E-109
E-114
E-109
E-114
38
28
16
33
22
10
31
19
7
1
18
30
29
17
5
6
21
20
32
8
2
9
25
13
3
24
23
3435
1112
27
26
3637
14
4
15
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