Mitsubishi Grandis. Manual — part 957
TROUBLESHOOTING
TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM
35C-153
<RH drive vehicles>
OPERATION
TCL/ASC-ECU terminal 38 is earthed every time the
TCL switch is pressed. TCL/ASC-ECU monitors this
operation state and turns the TCL system ON or
OFF.
COMMENT
The cause is probably an open-circuit in the TCL
switch circuit.
PROBABLE CAUSES
• Malfunction of the TCL switch
• Damaged harness, connector
• Malfunction of the TCL/ASC-ECU
TCL OFF
SWITCH
COMBINATION
METER
TCL/ASC-ECU
FRONT-ECU
TAIL LAMP
RELAY
RELAY
BOX
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
TCL Switch Circuit
TROUBLESHOOTING
TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM
35C-154
DIAGNOSIS
STEP 1. 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 terminal voltage between special
tool MB991997 connector terminal 38
(TCL/ASC-ECU connector A-04 terminal 38) and
earth.
OK:
• When the TCL switch is not pressed,
the voltage should measure battery
positive voltage (approximately 12
volts).
• When the TCL switch is pressed, the
voltage should measure 1 volt or less.
(4) Turn the ignition switch to the "LOCK" (OFF)
position.
(5) Disconnect special tool MB991997 between the
TCL/ASC-ECU and the body-side harness
connector.
(6) Connect all the connectors from the
TCL/ASC-ECU.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 2.
STEP 2. Check the TCL switch.
(1) Remove the TCL switch. (Refer to
(2) Connect an ohmmeter to the TCL switch between
terminals 1 and 2.
(3) Check for continuity between terminals 1 and 2
when the TCL switch is operated.
OK:
• There is no continuity between
terminals 1 and 2 when the TCL
switch is not pressed.
• There is continuity between terminals
1 and 2 when the TCL switch is
pressed.
Q: Is the check result normal?
YES :
Install the TCL switch. (Refer to
). Then go to Step 6.
NO :
Replace the TCL switch. (Refer to
). Then go to Step 7.
AC312620AQ
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)
AC313229AB
C-28 TCL switch
connector
TROUBLESHOOTING
TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM
35C-155
STEP 3. Check TCL/ASC-ECU connector A-04,
intermediate connector C-124 and TCL switch
connector C-28 for loose, corroded or damaged
terminals, or terminals pushed back in the
connector.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair or replace the faulty connector. Then
go to Step 7.
STEP 4. Check the harness wire between
TCL/ASC-ECU connector A-04 terminal 38 and
TCL switch connector C-28 terminal 1 for
damage.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the damaged harness wire. Then go
to Step 7.
AC312621
Oil reservoir
Connector: A-04
AB
A-04
Hydraulic unit
(with built-in TCL/ASC-ECU)
A-04 Harness connector
(harness side)
AC312624AG
Connectors: C-28, C-124
<L.H.drive vehicles>
C-28
C-124
C-124
C-28
AC312625AG
Connectors: C-28, C-124
<R.H.drive vehicles>
C-124
C-124
C-28
C-28
AC312621
Oil reservoir
Connector: A-04
AB
A-04
Hydraulic unit
(with built-in TCL/ASC-ECU)
A-04 Harness connector
(harness side)
AC312624 AH
Connector: C-28
<L.H.drive vehicles>
C-28
C-28 Harness connector
(harness side)
AC312625AH
Connector: C-28
<R.H.drive vehicles>
C-28
C-28 Harness connector
(harness side)
TROUBLESHOOTING
TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM
35C-156
STEP 5. Check the harness wire between TCL
switch connector C-28 terminal 2 and earth for
damage.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the damaged harness wire. Then go
to Step 7.
STEP 6. Retest the system
Q: Is TCL system cancelled when the TCL switch is
push on?
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
).
NO :
Replace the hydraulic unit (integrated with
TCL/ASC-ECU). Then go to Step 7.
STEP 7. Retest the system
Q: Does TCL system cancelled, when the TCL switch
is push on?
YES :
The procedure is complete.
NO :
Return to Step 1.
INSPECTION PROCEDURE 11: TCL/ASC System dose not Operate.
COMMENT
The fail-safe function is probably canceling TCL/ASC
system. In this case, MUT-III can be used to Retest
each system by checking the diagnosis codes.
PROBABLE CAUSES
• Malfunction of the CAN bus line.
• Malfunction of the TCL/ASC-ECU.
• Battery voltage low.
DIAGNOSIS
STEP 1. Hydraulic unit check
Refer to
.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Connect the brake pipes correctly, repair the
external brake lines, or replace the hydraulic
unit.
STEP 2. Verify that the condition described by
the customer exists.
Q: Can any faults be found with the brake operation?
YES :
Check the brake system related
components except the ASC system.
NO :
The procedure is complete.
DATA LIST REFERENCE TABLE
M1355001500023
The following items can be read by the MUT-III from
the TCL/ASC-ECU input data.
AC312624 AH
Connector: C-28
<L.H.drive vehicles>
C-28
C-28 Harness connector
(harness side)
AC312625AH
Connector: C-28
<R.H.drive vehicles>
C-28
C-28 Harness connector
(harness side)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст