Code No.C1625: AWC Pressure Sensor System (Power Supply Voltage Abnormality)


AWC PRESSURE SENSOR SYSTEM CIRCUIT



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis 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



DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • AWC pressure sensor malfunction
  • Damaged harness wires and connectors
  • Malfunction of AWC-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 3.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting ). After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1625 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. Voltage measurement at F-38 AWC pressure sensor connector
(1)Disconnect the connector, and measure the voltage between the terminal No.1 and the body earth at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.
OK: Approx. 5 V

Q. Is the check result normal?
Go to Step 6.
Go to Step 4.

STEP 4. AWC-ECU connector, AWC pressure sensor connector check: C-44, F-38

Q. Is the check result normal?
Go to Step 5.
Repair the defective connector. Then go to Step 8.

STEP 5. Check the wiring harness between C-44 AWC-ECU connector terminal No.6 and F-38 AWC pressure sensor connector terminal No.1.
Check the power supply line for short or open circuit.

Q. Is the check result normal?
Go to Step 6.
Check D-11 intermediate connector. When no problem is found, repair the wiring harness. Then go to Step 8.

STEP 6. M.U.T.-III data list.
Item No.86: Pressure sensor power supply voltage (Refer to data list reference table ).

Q. Is the check result normal?
Go to Step 7.
Replace the hydraulic unit. (Refer to ). Then go to Step 7.

STEP 7. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1625 set?
Replace the AWC-ECU. (Refer to ). Then go to Step 8.
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 8. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1625 set?
Return to Step 1.
This diagnosis is complete.