Mitsubishi Outlander XL. Manual — part 689
JOINT
CONNECTOR
(CAN1)
Brake Warnnig Light Circuit
INTERFACE
CIRCUIT
INTERFACE
CIRCUIT
CPU
CAN
TRANSCEIVER
CIRCUIT
LED DRIVE
CIRCUIT
COMBINATION METER
PARKING
BRAKE SWITCH
LCD
FUEL WARNING/OIL
PRESSURE WARNING
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
ETACS-
ECU
BRAKE FLUID
LEVEL SWITCH
CIRCUIT OPERATION
When the parking brake switch is turned ON, the combination
meter terminal No. 4 is earthed, and the brake warning light
illuminates.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-163
DIAGNOSIS
TECHNICAL DESCRIPTION (COMMENT)
The following cases may have occurred.
⦆
Ground fault in the parking brake switch circuit.
⦆
The EBD is defective.
⦆
The brake fluid level in the brake fluid reservoir is the specified
value or lower.
TROUBLESHOOTING HINTS (The most likely causes for
this case:)
⦆
Low brake fluid level
⦆
Damaged wiring harness and connectors
⦆
Parking brake switch malfunction
⦆
Combination meter malfunction
⦆
Malfunction of ETACS-ECU
⦆
Malfunction of EBD
DIAGNOSIS
Required Special Tools:
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: Vehicle Communication Interface (V.C.I.)
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
STEP 1. Brake fluid level check
Q:Is the check result normal?
YES:
Go to Step 2.
NO:
Add brake fluid to the specified level.
STEP 2. Brake fluid level switch check
Refer to GROUP 35A - On-vehicle Service P.35A-19.
Q:Is the check result normal?
YES:
Go to Step 3.
NO:
Replace the reservoir assembly and master cylinder
assembly.
STEP 3. Voltage measurement at C-312 ETACS-ECU
connector
ZC6016860000
C-312: Harness side
⦆
Measure the voltage between the terminal No. 1 and the body
ground.
OK: Approx. 5 volts
Q:Is the check result normal?
YES:
Go to Step 4.
NO:
Replace ETACS-ECU.
STEP 4. Connector check: C-312 ETACS-ECU connector,
A-09 brake fluid level switch connector
Q:Is the check result normal?
35C-164
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
YES:
Go to Step 5.
NO:
Repair the defective connector.
STEP 5. Check the wiring harness between the C-312
ETACS-ECU connector terminal No. 1 and the A-09 brake
fluid level switch connector terminal No. 1.
Q:Is the check result normal?
YES:
Go to Step 6.
NO:
Check the wiring harness between the C-312 ETACS-ECU
connector terminal No. 1 and the A-09 brake fluid level
switch connector terminal No. 1.
STEP 6. Parking brake lever stroke check
Refer to GROUP 36 - On-vehicle Service P.36-11.
Q:Is the check result normal?
YES:
Go to Step 7.
NO:
Adjust the parking brake lever stroke, and then go
to Step 10.
STEP 7. Parking brake switch check
Refer to GROUP 36 - On-vehicle Service P.36-12.
Q:Is the check result normal?
YES:
Go to Step 8.
NO:
Replace the parking brake switch.
STEP 8. Voltage measurement at the C-03 combination
meter connector
ZC601695
C-07: Harness side
0000
⦆
Measure the voltage between terminal No. 4 and body ground.
OK: Approx. 5 volts
Q:Is the check result normal?
YES:
Go to Step 9.
NO:
Replace the combination meter assembly, and then go
to Step 10.
STEP 9. Connector check: C-03 Combination meter
connector, C-22 intermediate connector, D-125 parking
brake switch connector
Q:Is the check result normal?
YES:
Repair the wiring harness between the C-03
combination meter connector terminal No. 4 and the D-125
parking brake switch connector.
NO:
Repair the defective connector.
STEP 10. Retest the system.
Q:Does the brake warning light turn ON and OFF normally
according to the parking brake lever operation?
YES:
The procedure is complete.
NO:
Return to Step 1.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-165
DIAGNOSIS
Inspection Procedure 4: ABS Warning Light does not Illuminate when Ignition Switch
is Turned to the ON Position (Engine Stopped).
M13506100087USA0000010000
SYSTEM OPERATION
⦆
ASC-ECU sends the illumination request signal of the ABS
warning light to the combination meter through ETACS-ECU
via CAN communication.
⦆
ASC-ECU illuminates the ABS warning light via ETACS-ECU
for approximately 3 seconds for valve check with the ignition
switch turned to the ON position.
TECHNICAL DESCRIPTION (COMMENT)
This may be caused by faults in the CAN bus line, ETACS-ECU,
combination meter or ASC-ECU.
PROBABLE CAUSES
⦆
Damaged wiring harness and connectors
⦆
Malfunction of ETACS-ECU
⦆
Combination meter malfunction
⦆
ASC-ECU malfunction
DIAGNOSIS
Required Special Tools:
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: Vehicle Communication Interface (V.C.I.)
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q:Is the check result normal?
YES:
Go to Step 2.
NO:
Repair the CAN bus lines. (Refer to GROUP 54D - CAN
Bus Diagnostics table P.54D-17.)
STEP 2. M.U.T.-III diagnostic trouble code
Use scan tool to check the diagnostic trouble code for the ASC
system.
Q:Is the diagnostic trouble code set?
YES:
Carry out the diagnosis for the diagnostic trouble
NO:
Go to Step 3.
STEP 3. M.U.T.-III actuator test
Perform the actuator test No. 07 of the combination meter
system, and check if the ABS warning light illuminates.
35C-166
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
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