Mitsubishi Galant (2004+). Manual — part 525
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-45
STEP 2. Recheck for diagnostic trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1226, C1231, C1236, C1241, C1246, C1251,
C1256 or C1261 set?
YES : Go to Step 3.
NO : The procedure is complete.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-46
STEP 3. Measure the voltage at ABS-ECU connector A-02.
(1) Disconnect the connector A-02, and connect special tool
ABS Check Harness (MB991970) to the wiring
harness-side connector.
NOTE: Do not connect special tool ABS Check Harness
(MB991970) to the ABS-ECU.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground. It
should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts (battery positive
voltage)?
YES : Go to Step 5.
NO : Go to Step 4.
AC306403
19
2
18
1
8
9
7
6
5
4
3
10
11
25
15
16
17
27
28
26
12
13
14
23
24
22 21 20
AE
ABS-ECU
MB991970
CHECK CONNECTOR
A-02 HARNESS
CONNECTOR
A-02 (GR)
CONNECTOR: A-02
HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-47
STEP 4. Check ABS-ECU connector A-02 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ABS-ECU connector A-02 damaged?
YES : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
NO : An open or short circuit may be present in the
solenoid valve power supply circuit. Repair the wiring
harness between ABS-ECU connector A-02 terminal
1 and fusible link No.3.Then go to Step 8.
AC306406
19
2
18
1
8
9
7
6
5
4
3
10
11
25
15
16
17
27
28
26
12
13
14
23
24
22 21 20
A-02 HARNESS CONNECTOR
(HARNESS SIDE)
AB
A-02 (GR)
CONNECTOR: A-02
HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-48
STEP 5. Measure the resistance at ABS-ECU connector
A-02.
(1) Disconnect the connector A-02, and connect special tool
ABS Check Harness (MB991970) to the wiring
harness-side connector.
NOTE: Do not connect special tool ABS Check Harness
(MB991970) to the ABS-ECU.
(2) Measure the resistance between terminal 2 and ground. It
should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 7.
NO : Go to Step 6.
AC306403
19
2
18
1
8
9
7
6
5
4
3
10
11
25
15
16
17
27
28
26
12
13
14
23
24
22 21 20
AF
ABS-ECU
MB991970
ABS CHECK
HARNESS
CHECK CONNECTOR
A-02 HARNESS CONNECTOR
(HARNESS SIDE)
A-02 (GR)
CONNECTOR: A-02
HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)
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