Mitsubishi L200. Manual — part 422

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-9

ABS WARNING LAMP AND BRAKE
WARNING LAMP CHECK

M1352012000799

Check that ABS and brake warning lamps illuminate
as follows.
NOTE: The EBD warning lamp is also used as the
brake warning lamp.

AC506224AB

Approx. 3 s

Warning
lamp

Ignition
switch

Illuminated

Not
illuminated

START

ON

ACC

ABS warning lamp

Brake warning lamp

1. When the ignition switch is turned to the ON

position, ABS and brake warning lamps illuminate.

2. The ABS and brake warning lamps illuminate for

three seconds

*1

and then turn OFF

*2

.

3. Otherwise, check the diagnosis code.
NOTE:

.

•

*1

: The ABS warning lamp may stay ON until the

vehicle speed reaches 10 km/h. As far as ABS-
ECU stores any diagnosis code related to the
wheel speed sensor malfunction or the motor
malfunction as past trouble, ABS-ECU continues
illuminating the ABS warning lamp until it verifies
that the malfunction for that code is resolved
(startup check).

•

*2

: The brake warning lamp does not turn OFF

when the parking brake is applied or the brake
fluid level is lowered.

DIAGNOSIS FUNCTION

M1352011201696

ABS-ECU has the following functions for easier sys-
tem checks. The following items can be diagnosed
using M.U.T-III.

• Diagnosis code set (Refer to

P.35B-14

).

• Service data output (Refer to

P.35B-54

).

• Actuator test (Refer to

P.35B-54

).

CHECK OF FREEZE FRAME DATA

To detect fault and store the diagnosis code, the
ABS-ECU obtains data before the confirmation of the
diagnosis code and data when the diagnosis code is
confirmed, and then stores the current condition of
the ABS-ECU. By analysing each data from M.U.T.-
III, the troubleshooting can be performed more effi-
ciently. Display items of the freeze frame data are as
follows.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-10

Display item list

Item No.

Item name

Data item

Unit

02

Ignition cycle

Number of times the ignition switch is turned
"ON" or "LOCK (OFF)" after the past failure
transition.

Number of
counts is
displayed.

03

Elapsed time

Total elapsed time after a diagnosis code is
generated

min

*

04

Accumulated minute

Cumulative time for current malfunction of
diagnosis code

min

NOTE:

*

: Total elapsed time can be stored up to

65534 minutes. The display of M.U.T.-III is fixed to
65534 minutes after 65534 minutes have elapsed.
Or, if the battery is disconnected, the total elapsed
time cannot be measured properly. Thus, 65535 min-
utes (null value) is displayed. Since the value is cal-
culated according to the information from the ABS-
ECU, a proper value may not be displayed when the
ABS-ECU time-out has occurred.

FAIL-SAFE FUNCTION

If any malfunction is detected by the self-diagnostic
function, ABS-ECU illuminates the ABS warning
lamp and brake warning lamp

*

, and it disables ABS

and EBD control.

NOTE: *: The brake warning lamp is used as EBD
control warning lamp.

Illumination condition of warning lamp in case of failure

Diagnosis
code No.

Item

Countermeasures for failure
Brake warning lamp ABS warning lamp

C1200

Wheel speed sensor
(FR)

Signal open circuit

Extinguished

*1

Illuminated

*2

Illuminated

C1205

Wheel speed sensor
(FL)

Signal open circuit

C1210

Wheel speed sensor
(RR)

Signal open circuit

C1215

Wheel speed sensor
(RL)

Signal open circuit

C1201

Wheel speed sensor
(FR)

Signal short circuit

Extinguished

*1

Illuminated

*2

Illuminated

C1206

Wheel speed sensor
(FL)

Signal short circuit

C1211

Wheel speed sensor
(RR)

Signal short circuit

C1216

Wheel speed sensor
(RL)

Signal short circuit

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-11

C1202

Wheel speed sensor
(FR)

Malfunction power
circuit

Extinguished

*1

Illuminated

*2

Illuminated

C1207

Wheel speed sensor
(FL)

Malfunction power
circuit

C1212

Wheel speed sensor
(RR)

Malfunction power
circuit

C1217

Wheel speed sensor
(RL)

Malfunction power
circuit

C1225

*3

Wheel speed sensor
malfunction

Abnormality in tyre size

Extinguished

Illuminated

C1226

Control solenoid valve (FR) pressure holding
system

Illuminated

Illuminated

C1236

Control solenoid valve (FL) pressure holding
system

C1246

Control solenoid valve (RR) pressure holding
system

C1256

Control solenoid valve (RL) pressure holding
system

C1231

Control solenoid valve (FR) pressure reducing
system

Illuminated

Illuminated

C1241

Control solenoid valve (FL) pressure reducing
system

C1251

Control solenoid valve (RR) pressure reducing
system

C1261

Control solenoid valve (RL) pressure reducing
system

C1266

*4

Motor malfunction

Motor stick or open
circuit

Illuminated

Illuminated

C1273

*4

Motor relay
malfunction

Open circuit

Illuminated

Illuminated

C1274

Motor relay
malfunction

Short circuit

Illuminated

Illuminated

C1278

Valve relay malfunction Open circuit

Illuminated

Illuminated

C1279

Valve relay malfunction Short circuit

Illuminated

Illuminated

C1340

Stop lamp switch
malfunction

Short circuit (short to
power supply)

Extinguished

Illuminated

C1365

*5

G-sensor malfunction

Power supply error

Extinguished

Illuminated

C1381

*5, *6

G-sensor malfunction

Abnormal seizure or
output error

Extinguished

Illuminated

C1382

*5

G-sensor malfunction

Low voltage

Extinguished

Illuminated

C1383

*5

G-sensor malfunction

High voltage

Extinguished

Illuminated

Diagnosis
code No.

Item

Countermeasures for failure
Brake warning lamp ABS warning lamp

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-12

NOTE:

.

•

*1

: Normality on rear wheels (both right or left)

•

*2

: Abnormality on rear wheels (both right and left)

•

*3

: This diagnosis code is not set within the vehicle speed of 30 km/h or less.

•

*4

: This diagnosis code is not set within the vehicle speed of 10 km/h or less.

•

*5

: 4WD

•

*6

: This diagnosis code is not set within the vehicle speed of 30 km/h or less.

Under EBD and ABS control in case of failure

C1860

ABS-ECU power
supply system
malfunction

high voltage

Illuminated

Illuminated

C1861

ABS-ECU power
supply system
malfunction

Low voltage

Illuminated

Illuminated

C1395

Brake fluid charging incompletion

Flashes

Flashes

U1073

Trouble in CAN bus system

Extinguished

Extinguished

Diagnosis
code No.

Item

Countermeasures for failure
Brake warning lamp ABS warning lamp

Diagnosis
code No.

Item

Countermeasures for failure
EBD control

ABS control

C1200

Wheel speed sensor
(FR)

Open circuit

Executed

*1

Prohibited

*2

Prohibited

C1205

Wheel speed sensor
(FL)

Open circuit

C1210

Wheel speed sensor
(RR)

Open circuit

C1215

Wheel speed sensor
(RL)

Open circuit

C1201

Wheel speed sensor
(FR) system

Short circuit

Executed

*1

Prohibited

*2

Prohibited

C1206

Wheel speed sensor
(FL) system

Short circuit

C1211

Wheel speed sensor
(RR) system

Short circuit

C1216

Wheel speed sensor
(RL) system

Short circuit

C1202

Wheel speed sensor
(FR)

Malfunction power
circuit

Executed

*1

Prohibited

*2

Prohibited

C1207

Wheel speed sensor
(FL)

Malfunction power
circuit

C1212

Wheel speed sensor
(RR)

Malfunction power
circuit

C1217

Wheel speed sensor
(RL)

Malfunction power
circuit