Code No. C200E: Fail safe relay stuck ON (Brake electric vacuum pump)
Code No. C200F: Fail safe relay stuck OFF (Brake electric vacuum pump)



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

TROUBLE JUDGEMENT


The PHEV-ECU stores diagnosis code No. C200E or C200F when the brake electric vacuum pump control main relay is stuck on or off.

PROBABLE CAUSES



  • Malfunction of brake electric vacuum pump main relay
  • Malfunction of the brake electric vacuum pump relay box
  • Malfunction of brake electric vacuum pump control relay 1 or 2
  • Damaged harness or connector
  • Malfunction of PHEV-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Go to Step 3.
The procedure is complete.

STEP 3. Brake electric vacuum pump main relay check


Refer to GROUP 35A - On-vehicle Service - Relay Check .

Q. Is the check result normal?

Go to Step 4.
Replace the brake electric vacuum pump main relay.

STEP 4. Voltage measurement at brake electric vacuum pump main relay connector terminal No.5.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the brake electric vacuum pump main relay connector terminal No.5 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 6.
Go to Step 5.

STEP 5. Check the power supply line for open and short circuit (fusible rink and electric vacuum pump main relay).



  • Fusible rink and brake electric vacuum pump main relay connector terminal No.5.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 6. Voltage measurement at brake electric vacuum pump control relay 1 and 2 connector terminal No.5.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure between the connectors below and body earth.

  • Measure the voltage between the brake electric vacuum pump control relay 1 connector terminal No.5 and body earth.
  • Measure the voltage between the brake electric vacuum pump control relay 2 connector terminal No.5 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 8.
Go to Step 7.

STEP 7. Check the power supply line for open and short circuit (electric vacuum pump main relay and electric vacuum pump control relay 1 or 2).



  • Brake electric vacuum pump main relay 1 connector terminal No.4 and brake electric vacuum control main relay 1 connector terminal No.5 connector.
  • Brake electric vacuum pump main relay 2 connector terminal No.4 and brake electric vacuum control main relay 1 connector terminal No.5 connector.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 8. Voltage measurement at PHEV-ECU (VPR1, VPR2) connector terminal.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the PHEV-ECU (VPM1 terminal) connector and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 10.
Go to Step 9.

STEP 9. Check the power supply line for open and short circuit (Electric vacuum pump main relay and PHEV-ECU).


Brake electric vacuum pump main relay connector terminal No.1. and PHEV-ECU (VPM1 terminal) connector.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the connector or wiring harness.

STEP 10. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Replace the PHEV-ECU (Refer to ).
The procedure is complete.