Mitsubishi Grandis. Manual — part 912
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-63
<RH drive vehicles>
TECHNICAL DESCRIPTION (COMMENT)
If the MUT-III can not communicate with the ABS
system, the CAN bus lines may be defective. If the
ABS system does not work, the ABS-ECU or its
power supply circuit may be defective.
PROBABLE CAUSES
• Damaged wiring harness or connector
• Malfunction of the hydraulic unit (Integrated with
ABS-ECU)
IGNITION
SWITCH (IG1)
DIAGNOSIS
CONNECTOR
POWER
SUPPLY
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
FRONT SIDE
AC313153
ABS-ECU
20
13
26
21
23
Data Link Connector Circuit
AB
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-64
DIAGNOSIS
STEP 1. MUT-III CAN bus diagnostics
CAUTION
Before connecting or disconnecting the MUT-III,
turn the ignition switch to the "LOCK" (OFF)
position.
Use MUT-III to diagnose the CAN bus lines.
(1) Connect MUT-III to the 16-pin diagnosis
connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result normal?
YES :
Check and repair the power supply circuit
NO :
Repair the CAN bus lines (Refer to GROUP
54D, CAN bus line Diagnostic flow
).
AC302297
AC310120
AB
MB991827
16-pin
MB991910
MB991824
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-65
INSPECTION PROCEDURE 2: ABS-ECU power supply supply system
<LH drive vehicles>
IGNITION
SWITCH (IG1)
ABS-ECU
POWER
SOURCE
Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet
ABS-ECU Power Supply and Ground Circuit
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-66
<RH drive vehicles>
OPERATION
• The ABS-ECU is energized by the ignition switch
(IG1) through multi-purpose fuse 2 and the
ABS-ECU terminal 20.
• If the power supply to the ABS-ECU has failed,
MUT-III will not be able to communicate with it.
PROBABLE CAUSES
• Damaged wiring harness or connector
• Defective battery
• Charging system failed
• Malfunction of the hydraulic unit (integrated with
ABS-ECU)
IGNITION
SWITCH (IG1)
ABS-ECU
POWER
SOURCE
Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet
ABS-ECU Power Supply and Ground Circuit
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