C1611
DTC C1611: AWC Pressure Sensor System (Low Voltage)
CAUTION:
- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
OPERATION
AWC-ECU controls the electric pump by the information from AWC pressure sensor.
DTC SET CONDITIONS
The code is set when AWC pressure sensor output voltage is less than 0.2 V.
PROBABLE CAUSES
- AWC pressure sensor malfunction
- Damaged harness wires and connectors
- Malfunction of AWC-ECU
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q. Is the check result normal?
YES Go to Step 3.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.) After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q. Is DTC No. C1611 set?
YES Go to Step 3.
NO This diagnosis is complete.
STEP 3. AWC-ECU connector, intermediate connector, AWC pressure sensor connector check: C-46, D-11, F-13
Q. Is the check result normal?
YES Go to Step 4.
NO Repair the defective connector. Then go to Step 7.
STEP 4. Check the wiring harness between C-46 AWC-ECU connector terminal No. 7 and F-13 AWC pressure sensor connector terminal No. 2.
Check the wiring harness for short circuit.
Q. Is the check result normal?
YES Go to Step 5.
NO Repair the wiring harness. Then go to Step 7.
STEP 5. Scan tool service data
Item No. 87: Pressure sensor output voltage
OK: 0.20 - 2.67 V
Q. Is the check result normal?
YES Go to Step 6.
NO Replace the hydraulic unit. Removal and Replacement.) Then go to Step 6.
STEP 6. Check whether the DTC is reset.
Q. Is DTC No. C1611 set?
YES Replace the AWC-ECU.(Refer to Active Center Differential (ACD).) Then, go to Step 7.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
STEP 7. Check whether the DTC is reset.
Q. Is DTC No. C1611 set?
YES Return to Step 1.
NO This diagnosis is complete.