Mitsubishi Outlander GS45X. Manual — part 373
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-113
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. Check whether the DTC is reset.
Q: Is the DTC C1073 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-114
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) 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-01
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 HK
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-115
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
ASC-ECU connector terminal No.1 and the body
ground, and between the A-01 ASC-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 C1073 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 C1073 set?
YES : Return to Step 1.
NO : The procedure is complete.
AC606869AP
ABS-ECU
MB991974
Check harness
A-01 ABS-ECU
harness connector
ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-116
DTC C2116 Abnormality in power supply voltage in pump motor
ETACS-
ECU
AC703731
ABS-ECU
34
27
26
IGNITION
SWITCH (IG1)
AB
Power Supply Circuit
FUSIBLE
LINK
FUSIBLE
LINK
FUSIBLE
LINK
1G1
RELAY
SOLENOID VALVE
POWER SUPPLY
MOTOR POWER
SUPPLY
POWER
SUPPLY
AC901112
Connector: A-01
A-01 (B)
AE
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