Mitsubishi Outlander GS45X. Manual — part 374
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-117
CAUTION
• If there is any problem in the CAN bus lines, an incor-
rect DTC may be set. Prior to this diagnosis, diagnose
the CAN bus lines (Refer to GROUP 54C
− CAN Bus
Line Diagnostic Flow
• Whenever ECU is replaced, ensure that the CAN bus
lines are normal.
.
OPERATION
• ABS-ECU contains the power supply circuit (terminal
No.13) for the pump motor. The pump motor is energized by
the motor switch, which is incorporated in ABS-ECU.
• The pump motor switch, which is incorporated in ABS-ECU,
is always off unless the motor solenoid valve check is acti-
vated when the vehicle is started.
• ABS-ECU activates the pump motor by turning on the ECU
built-in pump motor switch.
.
DTC SET CONDITIONS
This DTCs will be set under the cases below:
• When the power supply voltage of the pump motor, which is
not in operation, is abnormally low for a prolonged period
• When the power supply voltage of the pump motor, which is
not in operation, is abnormally high for a prolonged period
.
PROBABLE CAUSES
Current trouble
• Fusible link malfunction
• Damaged wiring harness and connectors
• Abnormality in battery or generator
• ABS-ECU malfunction
Past trouble
• Carry out diagnosis with particular emphasis on wiring har-
ness and connector failures between the power supply cir-
cuit (A-01 ABS-ECU connector terminal No.13) to the
ABS-ECU motor and the ground circuit (A-01 ABS-ECU
connector terminal No.1). For diagnosis procedures, refer to
How to treat past trouble (GROUP 00
− How to Use Trou-
bleshooting/How to Treat Past Trouble
).
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
• MB991974: ABS check harness
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-118
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
Use scan tool MB991958 to diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus lines (Refer to GROUP 54C
−
CAN Bus Diagnostics Table
). On
completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
Q: Is the DTC C2116 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Battery check
Refer to GROUP 54A
− Battery Test
.
Q: Is the battery in good condition?
YES : Go to Step 4.
NO : Replace the battery. Then go to Step 11.
STEP 4. Charging system check
Refer to GROUP 16
− On−vehicle Service/Output Current Test
(3.0L engine).
Q: Is the charging system in good condition?
YES : Go to Step 5.
NO : Repair or replace the charging system component(s).
Then go to Step 11.
STEP 5. Connector check: A-01 ABS-ECU connector
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair the defective connector. Then go to Step 11.
STEP 6. Fusible link check: Check the fusible link No.26.
Visually check for open circuit in the fusible link No.26.
Q: Is the check result normal?
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-119
STEP 7. Resistance measurement at A-01 ABS-ECU
connector
(1) Disconnect the ABS-ECU connector, connect special tool
ABS check harness (MB991974) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ABS check harness
(MB991974) to ABS-ECU.
(2) Disconnect the fusible link No.26.
(3) Measure the resistance between the terminal No.13 and the
body ground.
OK: No continuity
Q: Is the check result normal?
YES : Replace the fusible link No.26. Then go to Step 11.
NO : The short circuit may be present in the power supply
circuit. Repair the wiring harness between the A-08
ABS-ECU connector terminal No.13 and the fusible
link No.26, and then replace the fusible link No.26.
Then go to Step 11.
STEP 8. Voltage measurement at the A-01 ABS-ECU
connector
(1) Disconnect the ABS-ECU connector, connect special tool
ABS check harness (MB991974) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ABS check harness
(MB991974) to ABS-ECU.
(2) Measure the voltage between the terminal No.13 and the
body ground.
OK: Approximately system voltage
Q: Is the check result normal?
YES : Go to Step 9.
NO : The open circuit may be present in the power supply
circuit. Repair the wiring harness between the A-01
ABS-ECU connector terminal No.13 and the fusible
link No.26. Then go to Step 11.
AC606869 HL
ABS-ECU
MB991974
Check harness
A-01 ABS-ECU
harness connector
AC606869AO
ABS-ECU
MB991974
Check harness
A-01 ABS-ECU
harness connector
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-120
STEP 9. Resistance measurement at A-01 ABS-ECU
connector
(1) Disconnect the ABS-ECU connector, connect special tool
ABS check harness (MB991974) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ABS check harness
(MB991974) to ABS-ECU.
(2) Measure the resistance between the terminal No.1 and the
body ground, and between the terminal No.14 and the body
ground.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES : Go to Step 10.
NO : An open circuit may be present in the ground circuit.
Repair the wiring harness between the A-01
ABS-ECU connector terminal No.1 and the body
ground, and between the A-01 ABS-ECU connector
terminal No.14 and the body ground. Then go to Step
11.
STEP 10. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12mph (20 km/h) or higher.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12mph (20 km/h) or higher.
Q: Is the DTC C2116 set?
YES : Replace the hydraulic unit (integrated with ABS-ECU)
(Refer to
). Then go to Step 11.
NO : Intermittent malfunction (Refer to GROUP 00
− How
to Use Troubleshooting/How to Cope with Intermittent
Malfunctions
).
STEP 11. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12mph (20 km/h) or higher.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12mph (20 km/h) or higher.
Q: Is the DTC C2116 set?
YES : Return to Step 1.
NO : The procedure is complete.
AC606869AP
ABS-ECU
MB991974
Check harness
A-01 ABS-ECU
harness connector
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст