Mitsubishi Montero (2004+). Manual — part 1058

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-75

STEP 8. Check the harness wire between valve relay
connector B-21X terminal 2 and HBB connector B-18
terminal 34.
NOTE: After inspecting HBB connector B-18, inspect the wire.
If HBB connector B-18 is damaged, repair or replace it. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If the

connector has been repaired or replaced, go to Step 10.
Q: Is the harness wire between valve relay connector

B-21X terminal 2 and HBB connector B-18 terminal 34
damaged?
YES : Repair it and then go to Step 10.
NO : Go to Step 9.

AC204626 AB

CONNECTOR: B-18

B-18 (B)

HARNESS CONNECTOR :
COMPONENT SIDE

34

32

31

33

35

B-18

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

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

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ANTI-LOCK BRAKING SYSTEM (ABS)

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STEP 9. Check the HBB.
(1) Disconnect HBB connector B-17 and B-18, and measure at

the HBB side.

(2) Check for continuity between HBB connector B-17

terminals 3 and HBB connector B-18 terminal 34. It should
be continuity (approximately 33

Ω).

Q: Is there continuity between HBB connector B-17

terminal 3 and HBB connector B-18 terminal 34?
YES : Replace the M-ASTC-ECU and then go to Step 10.
NO : Replace the HBB master cylinder and hydraulic unit

assembly. Then go to Step 10.

STEP 10. Recheck for diagnostic trouble code.
Q: Does DTC 52 reset?

YES : Go to Step 1.
NO : The procedure is complete.

AC205740AB

CONNECTORS: B-17, B-18

B-17 (GR)

B-18 (B)

B-17

B-18

HBB CONNECTORS

HBB CONNECTORS

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

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ANTI-LOCK BRAKING SYSTEM (ABS)

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DTC 61 : Master Cylinder Pressure Sensor System

.

CIRCUIT OPERATION
The master cylinder pressure sensor is monitoring
the brake fluid pressure to the rear wheels. The mas-
ter cylinder pressure sensor sends a signal from its
terminal No.1, and the M-ASTC-ECU receives the
signal at its connector No.59.

.

ABS DTC SET CONDITIONS
DTC 61 is set in the following case.

• When the power supply voltage is abnormally

high or low

• When the master cylinder pressure sensor output

signal is abnormally high or low

.

TROUBLESHOOTING HINTS

• Damaged wiring harness or connector

• Malfunction of the master cylinder pressure sen-

sor

• Malfunction of the M-ASTC-ECU

.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

Master Cylinder Pressure Sensor Circuit

AC204772AB

B-55(GR)

CONNECTOR: B-55

AC203901AF

CONNECTOR: E-120

E-120

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

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ANTI-LOCK BRAKING SYSTEM (ABS)

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• MB991223: Harness Set

STEP 1. Check the power supply circuit at pressure sensor
connector B-55.
(1) Do not disconnect pressure sensor connector B-55.
(2) Turn the ignition switch to the "ON" position.
(3) Measure voltage between terminal 2 and ground. It should

be approximately 5 volts.

Q: Is the voltage approximately 5 volts?

YES : Go to Step 4.
NO : Go to Step 2.

AC204772

AC204773AB

B-55(GR)

CONNECTOR: B-55

1

3

2

HARNESS CONNECTOR:
COMPONENT SIDE