Mitsubishi Montero (2004+). Manual - part 1042

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-11

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 11, 12, 13, 14: ABS Sensor (Open Circuit or Short Circuit)

AC204644AB

ABS Sensor Circuit

AC204389

CONNECTOR: A-03

A-03(B)

AB

AC204388

CONNECTOR: A-24

AB

A-24(B)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-12

.

CIRCUIT OPERATION

• A toothed ABS rotor generates a voltage pulse as 

it moves across the pickup field of each ABS sen-
sor.

• The amount of voltage generated at each wheel 

is determined by the clearance between the ABS 
rotor teeth and the ABS sensor, and by the speed 
of rotation.

• The ABS sensors transmit the frequency of the 

voltage pulses and the amount of voltage gener-
ated by each pulse to the Mitsubishi active skid 
and traction control system-electronic control unit 
(M-ASTC-ECU).

• The ABS hydraulic unit modulates the amount of 

braking force individually applied to each wheel 
cylinder.

.

ABS DTC SET CONDITIONS
DTCs 11, 12, 13, 14 are output when signal is not 
input due to breakage of the (+) or (

−) wire of one or 

more of the four ABS sensors. 

.

TROUBLESHOOTING HINTS
The most likely causes for these DTCs to set are:

• Malfunction of the ABS sensor

• Damaged wiring harness or connector

• Malfunction of the M-ASTC-ECU

.

DIAGNOSIS

Required Special Tools:

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

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

AC204387

CONNECTOR: A-37

A-37(B)

AB

AC204384

CONNECTOR: D-111

D-111

AB

AC204385

CONNECTORS: E-110, E-119, E-120

E-119

AB

E-120

E-110

AC204386

CONNECTOR: F-11

F-11(B)

AB

AC204390

CONNECTORS: G-14, G-21

G-21(B)

AB

G-14(B)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-13

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

STEP 1. Using scan tool MB991958, check data list.

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) Connect scan tool MB991958 to the data link connector.
(2) Start the engine.

(3) Set scan tool MB991958 to the data reading mode, and 

check the data list items by driving the vehicle.

• Item 11 (DTC 11 is set): Front right wheel speed sensor

• Item 12 (DTC 12 is set): Front left wheel speed sensor

• Item 13 (DTC 13 is set): Rear right wheel speed sensor

• Item 14 (DTC 14 is set): Rear left wheel speed sensor

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the speedometer indication match the scan tool 

indication?
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 

P.00-6

. 

NO :  Go to Step 2.

STEP 2. Check the ABS sensor installation.

Q: Is the ABS sensor bolted securely in place at the front 

knuckle or the rear knuckle?
YES : Go to Step 3.
NO :  Install it properly. Refer to 

P.35B-129

. Then go to Step 

9.

AC307591 AB

MB991911

DATA LINK

CONNECTOR

MB991824

MB991827

ACX01221

ABS SENSOR <FRONT>

AD

ACX01227AD

ABS SENSOR <REAR>

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-14

STEP 3. Inspect the ABS sensor or ABS rotor.

 Refer to 

P.35B-130

.

Check items:

• ABS sensor internal resistance: 1.0 − 1.5 kΩ

• Insulation between the ABS sensor body and the connector 

terminals

• Toothed ABS rotor check

Q: Is the ABS sensor or ABS rotor damaged?

YES :  Replace it and then go to Step 9.
NO :  Go to Step 4.

STEP 4. Check ABS sensor circuit at the M-ASTC-ECU 
connectors E-119 and E-120.

(1) Disconnect connectors E-119, E-120 and measure at the 

harness side.

(2) Measure the resistance between the M-ASTC-ECU 

connector E-119 terminals 30 and 31, 27 and 28 or 
M-ASTC-ECU connector E-120 terminals 46 and 47, 60 
and 61.

Standard Value: 1.0 

− 1.5 kΩ

Q: Is the resistance between M-ASTC-ECU connector E-119 

terminals 30 and 31, 27 and 28 or M-ASTC-ECU 
connector E-120 terminals 46 and 47, 60 and 61 within 
the standard value?
When resistances between all terminals are within the 
standard value. : Go to Step 9.
When resistance between M-ASTC-ECU connector 
E-119 terminals 30 and 31 is not within the standard 
value. : Go to Step 5.
When resistance between M-ASTC-ECU connector 
E-119 terminals 27 and 28 is not within the standard 
value. : Go to Step 6.
When resistance between M-ASTC-ECU connector 
E-120 terminals 46 and 47 is not within the standard 
value. : Go to Step 7.
When resistance between M-ASTC-ECU connector 
E-120 terminals 60 and 61 is not within the standard 
value. : Go to Step 8.

AC204391

CONNECTORS: E-119, E-120

E-119

AB

E-120

E-119 HARNESS CONNECTOR:
COMPONENT SIDE

E-120 HARNESS CONNECTOR:
COMPONENT SIDE