ABS DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-41
STEP 1. Using scan tool MB991958, diagnose the CAN bus
lines.
Use scan tool 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
P.54C-17
). On
completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC C1011 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Using scan tool MB991958, check the DTC
Check that the DTC C100A is also set.
Q: Is DTC C100A also set?
YES : Perform the diagnosis for the DTC C100A (Refer to
P.35B-17
).
NO : Go to Step 4.
STEP 4. Connector check: A-01 ABS-ECU connector, A-11
front wheel speed sensor <LH> connector
Q: Is the check result normal?
YES : Go to Step 5.
NO : Repair the defective connector. Then go to Step 12.
STEP 5. Wiring harness check between A-01 ABS-ECU
connector terminal No.18 and A-11 front wheel speed
sensor <LH> connector terminal No.1, and between A-01
ABS-ECU connector terminal No.19 and A-11 front wheel
speed sensor <LH> connector terminal No.2.
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair the wiring harness. Then go to Step 12.
STEP 6. Check wheel speed sensor <FL> installation
Check how the wheel speed sensor <FL> is installed (Discon-
nection of wheel speed sensor <FL>, loose mounting bolt,
etc.).
Q: Is the check result normal?
YES : Go to Step 7.
NO : Reinstall the wheel speed sensor <FL> (Refer to
P.35B-189
). Then go to Step 7.