ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-97
STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC C1048 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Using scan tool MB991958, check the DTC
Check that the DTCs C1020, C1027, C102A, or C1043 are also
set.
Q: Are DTC C1020, C1027, C102A, or C1043 also set?
YES : Carry out the diagnosis for the relevant DTCs.
NO : Go to Step 4.
STEP 4. Using scan tool MB991958, check the data list
Check the following data list (Refer to
P.35B-179
).
• Item No.03: RL wheel speed sensor
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 5.
STEP 5. Connector check: A-01 ABS-ECU connector,
C-129 intermediate connector, D-114 rear wheel speed
sensor <LH> connector
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair the defective connector. Then go to Step 13.
STEP 6. Wiring harness check between A-01 ABS-ECU
connector terminal No.24 and D-114 rear wheel speed
sensor <LH> connector terminal No.1, and between A-01
ABS-ECU connector terminal No.25 and D-114 rear wheel
speed sensor <LH> connector terminal No.2.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Repair the wiring harness. Then go to Step 13.
STEP 7. Check for wheel speed sensor <RL> installation
Check how the wheel speed sensor <RL> is installed (Discon-
nection of wheel speed sensor <RL>, loose mounting bolt,
etc.).
Q: Is the check result normal?
YES : Go to Step 8.
NO : Reinstall the wheel speed sensor <RL> correctly
(Refer to
P.35B-189
). Then go to Step 8.