DIAGNOSIS
TSB Revision
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-119
STEP 7. Resistance measurement at A-02 ASC-ECU
connector
(1) Disconnect the ASC-ECU connector, connect special tool
ASC check harness (MB991997) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ASC check harness
(MB991997) to ASC-ECU.
(2) Disconnect the fusible link No.27.
(3) Measure the resistance between the terminal No.32 and the
body ground.
OK: No continuity
Q: Is the check result normal?
YES : Replace the fusible link No.27. Then go to Step 11.
NO : The short circuit may be present in the power supply
circuit. Repair the wiring harness between the A-02
ASC-ECU connector terminal No.32 and the fusible
link No.27, and then replace the fusible link No.27.
Then go to Step 11.
STEP 8. Voltage measurement at the A-02 ASC-ECU
connector
(1) Disconnect the ASC-ECU connector, connect special tool
ASC check harness (MB991997) to the harness-side
connector, and then measure the voltage at the special tool
connector side.
NOTE: Do not connect the special tool ASC check harness
(MB991997) to ASC-ECU.
(2) Measure the voltage between the terminal No.32 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-02
ASC-ECU connector terminal No.32 and the fusible
link No.27. Then go to Step 11.
AC606869MA
ASC-ECU
MB991997
Check harness
A-02 ASC-ECU
harness connector
AC606869MB
ASC-ECU
MB991997
Check harness
A-02 ASC-ECU
harness connector