Mitsubishi 380. Manual — part 960
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-65
STEP 1. Using diagnostic tool MB991958, diagnose the
CAN bus line.
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link
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 CAN bus line found to be normal?
YES : Go to Step 3.
NO : Repair the CAN bus line (Refer to GROUP 54C,
). Then go to Step 2.
STEP 2. Recheck for diagnostic trouble code.
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1860 or C1861 set?
YES : Go to Step 3.
NO : The procedure is complete.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-66
STEP 3. Check the battery.
Check the battery (Refer to GROUP 54A, Battery test
Q: Is the battery in good condition?
YES : Go to Step 4.
NO : Charge or replace the battery. Then go to Step 8.
STEP 4. Check the charging system.
Check the charging system (Refer to GROUP 16, Charging
system diagnosis
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 8.
STEP 5. Measure the voltage at ABS-ECU connector A-02.
(1) Disconnect the connector A-02, and use special tool
Inspection Check Harness (MB991219) to probe the wiring
harness-side connector.
NOTE: The special tool (Inspection test harness)
MB991219 for connector pin contact pressure should be
used. The test probe should never be forcibly inserted, as it
may cause a defective contact.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 18 and ground. It
should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts (battery positive
voltage)?
YES : Go to Step 7.
NO : Go to Step 6.
35DB101A
CONNECTOR: A-02
HYDRAULIC UNIT
(WITH BUILT-IN ABS-ECU)
TEST
HARNESS
(MB991219)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-67
STEP 6. Check ABS-ECU connector A-02, junction block
connectors C-214, C-215 and ignition switch connector
C-318 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
• ABS-ECU connector A-02
• Junction block connectors C-214 and C-215
• Ignition switch connector C-308
Q: Are the connectors and terminals in good condition?
YES : An open or short circuit may be present in the power
supply line to the ABS-ECU. Repair the wiring
harness between ABS-ECU connector A-02 terminal
18 and ignition switch connector C-308 terminal 4. Go
to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
16DB402A
A-02 (GR)
CONNECTOR: A-02
A-02 HARNESS CONNECTOR:
35DB041A
CONNECTORS: C-214, C-215
C-215
1
3 4
2
6
5
C-214
6
1
7
2
9
8
10
3
5
12
11
4
1314
JUNCTION BLOCK
(FRONT VIEW)
35DB042A
CONNECTOR: C-308
C-308
2
5
4
1
6
3
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-68
STEP 7. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1860 or C1861 set?
YES : Replace the hydraulic unit (integrated with
ABS-ECU). Then go to Step 8.
NO : 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
STEP 8. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1860 or C1861 set?
YES : Go to Step 1.
NO : The procedure is complete.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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