Mitsubishi Montero (2002-2004). Manual — part 674
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-393
STEP 3. Measure the power supply voltage at EGR valve
motor harness side connector B-56.
(1) Disconnect the connector B-56 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2, No. 5 and
ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Go to Step 4.
STEP 4. Check connector B-22X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between MFI relay connector B-
22X (terminal No. 1) and idle air control motor
connector B-56 (terminal No. 2, No. 5) because of
open circuit or short circuit to ground. Then go to Step
12.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
STEP 5. Measure the power supply voltage at PCM
connector D-132 by backprobing.
(1) Do not disconnect the connector D-132.
(2) Measure the voltage between terminal (No. 3, No. 12, No.
19, No. 26) and ground by backprobing.
• The voltage is 1volt or lower for approximately 3 sec-
onds, then changes to the battery positive voltage when
the Ignition switch is turned from the "LOCK" (OFF)
position to the "ON" position.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 8.
NO : Go to Step 6.
AK200967
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2
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6
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
B-56(GR)
CONNECTOR: B-56
1
2
3
4
5
6
AK201419
B-56 HARNESS
CONNECTOR:
CONPONENT SIDE
AB
AK200951
2 1
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4
B-22X
AB
CONNECTOR: B-22X
HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
3
5
6 7 8 9
4
20
21 22
232425
2627
10111213
14 15
16 1718
19
AK201420
D-132 HARNESS
CONNECTOR:
HARNESS SIDE
AB
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-394
STEP 6. Check connector D-132 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 12.
STEP 7. Check for open circuit and short circuit to ground
between EGR valve connector B-56 and PCM connector D-
132.
a. EGR valve connector B-56 (terminal No. 1) and PCM con-
nector D-132 (terminal No. 3).
b. EGR valve connector B-56 (terminal No. 3) and PCM con-
nector D-132 (terminal No. 12).
c. EGR valve connector B-56 (terminal No. 4) and PCM con-
nector D-132 (terminal No. 19).
d. EGR valve connector B-56 (terminal No. 6) and PCM con-
nector D-132 (terminal No. 26).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.
AK200938
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1
10
14
15
16
17
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19
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21
22
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25
26
27
11
12
13
AB
CONNECTOR: D-132
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-132(GR)
AK200967
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2
3
4
5
6
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
B-56(GR)
CONNECTOR: B-56
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14
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19
20
21
22
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26
27
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AB
CONNECTOR: D-132
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-132(GR)
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-395
STEP 8. Check connector D-132 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 12.
AK200938
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4
5
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8
9
1
10
14
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16
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19
20
21
22
23
24
25
26
27
11
12
13
AB
CONNECTOR: D-132
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-132(GR)
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-396
STEP 9. Check the EGR valve operation using special tool
MB991658.
(1) Remove the EGR valve.
(2) Connect special tool MB991658 to the EGR valve. (All
terminals should be connected.)
(3) Use the jumper wires to connect terminal No. 2 of the EGR
valve onnector to the positive battery terminal.
(4) Check the ensure that the motor operates when the
terminal No. 1 and No. 3 of the EGR valve connector are
respectively connected to the negative battery terminal
using a jumper wire.
• Vibration should be present at each application of volt-
age to test clip combination.
(5) Then. Use jumper wires to connect the terminal No. 5 of the
EGR valve connector to the positive battery terminal.
(6) Check the ensure that the motor operates when the
terminal No. 4 and No. 6 of the EGR valve connector are
respectively connected to the negative battery terminal
using a jumper wire.
• Vibration should be present at each application of volt-
age to test clip combination.
(7) Reinstall the EGR valve, using a new gasket, and tighten to
the specified torque.
Tighten torque : 24
± 3 N⋅m [17 ± 3 ft⋅Ib]
Q: Is the EGR valve operating properly?
YES : Go to Step 10.
NO : Replace the EGR valve. Then go to Step 12.
AK200967
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2
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AB
HARNESS
CONNECTOR:
COMPONENT SIDE
B-56(GR)
CONNECTOR: B-56
AK000888
BATTERY
MB991658
AC
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