Mitsubishi Montero (2002-2004). Manual — part 1048
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-63
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the valve relay.
Q: Is the relay damaged?
YES : Replace it and go to Step 10.
NO : Go to Step 2.
STEP 2. Check the valve relay circuit at M-ASTC-ECU
connector E-119 by backprobing.
(1) Do not disconnect connector E-119.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 18 and ground by
backprobing. It should be less than 2V.
Q: Is the voltage less than 2V?
YES : Go to Step 3.
NO : Go to Step 5.
BATTERY VOLTAGE
TESTER
CONNECTION
SPECIFIED
CONDITION
Not applied
2
− 4
Less than 2
ohms
2
− 5
Open circuit
• Connect terminal 1 to the
positive battery terminal
• Connect terminal 3 to the
negative battery terminal
2
− 4
Open circuit
2
− 5
Less than 2
ohms
AC204274
AB
VALVE RELAY
2
1
3
5
4
1
3
2
4
5
AC203901AE
CONNECTOR: E-119
E-119
AC204705
HARNESS CONNECTOR:
COMPONENT SIDE
AB
E-119
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-64
STEP 3. Check the valve relay monitor circuit at M-ASTC-
ECU connector E-120 by backprobing.
(1) Do not disconnect connector E-120.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 55 and ground by
backprobing. It should be approximately 12 volts (battery
positive voltage).
Q: Is the voltage approximately 12 volts (battery positive
voltage)?
YES : Go to Step 4.
NO : Go to Step 6.
STEP 4. Check the M-ASTC-ECU connector E-120.
Q: Is the connector damaged?
YES : Repair it. Refer to GROUP 00E, Harness Connector
Inspection
NO : Replace the M-ASTC-ECU and go to Step 10.
AC203901AF
CONNECTOR: E-120
E-120
AC205737
CONNECTOR: E-120
E-120
AB
HARNESS CONNECTOR:
HARNESS SIDE
AC203901AF
CONNECTOR: E-120
E-120
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-65
STEP 5. Check the harness wire between ignition switch
(IG2) connector D-208 terminal 4 and M-ASTC-ECU
connector E-119 terminal 18.
AC204624 AH
CONNECTORS: D-208, D-212
D-212
JUNCTION BLOCK
(FRONT VIEW)
HARNESS CONNECTOR:
COMPONENT SIDE
3
4
10
11
8
9
1
2
5
6
7
D-212
D-208
JUNCTION BLOCK
CONNECTOR
D-208
AC203901
AC204627AC
CONNECTOR: E-119
E-119
HARNESS CONNECTOR:
COMPONENT SIDE
E-119
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-66
NOTE: After inspecting ignition switch (IG2) connector D-208
and M-ASTC-ECU connector E-119, valve relay connector B-
21X, joint connector D-116, junction block connectors D-208,
D-212 and intermediate connector E-111, inspect the wire. If
ignition switch (IG2) connector D-208 and M-ASTC-ECU con-
nector E-106, valve relay connector B-21X, joint connector D-
116, junction block connectors D-208, D-212 and intermediate
connector E-111 are damaged, repair or replace them. Refer to
GROUP 00E, Harness Connector Inspection
. If the
connector has been repaired or replaced, go to Step 10.
Q: Is the harness wire between ignition switch (IG2)
connector D-208 terminal 5 and M-ASTC-ECU connector
E-119 terminal 18 damaged?
YES : Repair it and then go to Step 10.
NO : Replace the M-ASTC-ECU and go to Step 10.
AC204706
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
5
B-21X
CONNECTOR: B-21X
AB
RELAY BOX CONNECTOR
AC204384
D-116
AE
CONNECTOR: D-116
AC204385
AC204673
CONNECTOR: E-111
AB
E-111
9
21
33
35
24
12
3 4
7
8
5 6
39
28
41
30
18
4243
31
1920
32
40
29
1617
38
27
15
37
36
26
14
13
25
2
1
34
23
11
10
22
E-111
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