Mitsubishi Grandis. Manual - part 921

 

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Mitsubishi Grandis. Manual - part 921

 

 

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-9

DIAGNOSTIC TROUBLE CODE 
PROCEDURES <TCL/ASC-ECU>

Code No.C1200: Front Right Wheel Speed Sensor (Open Circuit or Short Circuit)
Code No.C1205: Front Left wheel Speed Sensor (Open Circuit or Short Circuit)
Code No.C1210: Rear Right wheel Speed Sensor (Open Circuit or Short Circuit)
Code No.C1215: Rear Left wheel Speed Sensor (Open Circuit or Short Circuit)

CAUTION

If there is any problem in the CAN bus lines, an 
incorrect diagnosis code may be set. Diagnose 
the CAN bus lines before the diagnosis codes 
(Refer to GROUP 54D, CAN bus-line diagnostic 
flow 

P.54D-9

).

OPERATION

• Wheel speed sensor is a kind of a pulse 

alternator. It consists of encoders (a plate on 
which north and south pole sides of the magnets 
are arranged alternately) for detecting wheel 
speed which rotates at the same speed of the 
wheels and speed sensors. This sensor outputs 
frequency pulse signals in proportion to wheel 
speed.

(FRONT: LH)

(FRONT: RH)

(REAR: LH)

(REAR: RH)

WHEEL SPEED SENSOR

TCL/ASC-ECU

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   

Wheel Speed Sensor Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-10

• The wheel speed sensors transmit the frequency 

of the current pulses and the amount of voltage 
generated by each pulse to the TCL/ASC-ECU.

DIAGNOSIS CODE SET CONDITIONS

Diagnosis codes No.C1200, C1205, 1210 and 1215 
are set when breakage of the wires of the four wheel 
speed sensors occur.

PROBABLE CAUSES

The most likely causes for these diagnosis codes to 
set are:

• Malfunction of the wheel speed sensor

• Damaged wiring harness or connector

• Malfunction of the hydraulic unit (integrated with 

TCL/ASC-ECU)

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.
(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.
(4) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is the check result normal?

YES : 

Go to Step 3

NO : 

Repair the CAN bus line (Refer to GROUP 
54D, CAN bus line Diagnostic flow 

P.54D-9

). Then go to Step 2.

STEP 2. Check whether the diagnosis code is 
reset.

CAUTION

Before connecting or disconnecting the MUT-III, 
turn the ignition switch to the "LOCK" (OFF) 
position.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF) 

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is code No.C1200, C1205, C1210 or C1215 set?

YES : 

Go to Step 3

NO : 

The procedure is complete.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-11

STEP 3. MUT-III data list

CAUTION

Before connecting or disconnecting the MUT-III, 
turn the ignition switch to the "LOCK" (OFF) 
position.
(1) Connect MUT-III to the 16-pin diagnosis 

connector.

(2) Start the engine.
(3) Set MUT-III to the data reading mode, and check 

the data list items by driving the vehicle.

• Item 01 (Code No.C1200 is set): Front right 

wheel speed sensor

• Item 02 (Code No.C1205 is set): Front left 

wheel speed sensor

• Item 03 (Code No.C1210 is set): Rear right 

wheel speed sensor

• Item 04 (Code No.C1215 is set): Rear left 

wheel speed sensor

(4) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Does the speedometer indication match the MUT-III 

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.00-5

.

NO : 

Go to Step 4.

STEP 4. Voltage measurement at TCL/ASC-ECU 
connector A-04.

(1) Disconnect the connector A-04, and connect 

special tool ABS Check Harness (MB991997) to 
the wiring harness-side connector.
NOTE: Do not connect special tool ABS Check 
Harness (MB991997) to the TCL/ASC-ECU.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between the relevant signal 

and earth terminals in the wheel speed sensor 

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC312620AB

Oil reservoir

Connector: A-04

TCL/ASC-ECU

MB991997

Check connector

A-04 Harness connector

A-04

Hydraulic unit
(with built-in TCL/ASC-ECU)

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-12

circuit and body earth.

OK: less than 1V or less

• Code No.C1200 is set: Between signal 

terminal 33 and body earth, and between 
earth terminal 34 and body earth

• Code No.C1205 is set: Between signal 

terminal 45 and body earth, and between 
earth terminal 46 and body earth

• Code No.C1210 is set: Between signal 

terminal 42 and body earth, and between 
earth terminal 43 and body earth

• Code No.C1215 is set: Between signal 

terminal 36 and body earth, and between 
earth terminal 37 and body earth

Q: Is the check result normal?

YES : 

Go to Step 5.

NO (When the voltage between terminal 33 or 34 

− 

and body earth measures more than 1 V) : 

Go to 

Step 6.

NO (When the voltage between terminal 45 or 46 

− 

and body earth measures more than 1 V) : 

Go to 

Step 8.

NO (When the voltage between terminal 42 or 43 

− 

and body earth measures more than 1 V) : 

Go to 

Step 10.

NO (When the voltage between terminal 36 or 37 

− 

and body earth measures more than 1 V) : 

Go to 

Step 12.

STEP 5. Resistance measurement at 
TCL/ASC-ECU connector A-04.

(1) Disconnect the connector A-04, and connect 

special tool ABS Check Harness (MB991997) to 
the wiring harness-side connector.
NOTE: Do not connect special tool ABS Check 
Harness (MB991997) to the TCL/ASC-ECU.

(2) Measure the resistance between the relevant 

signal and earth terminals in the wheel speed 

AC312620AC

Oil reservoir

Connector: A-04

TCL/ASC-ECU

MB991997

Check connector

A-04 Harness connector

A-04

Hydraulic unit
(with built-in TCL/ASC-ECU)

 

 

 

 

 

 

 

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