Code No. C2007: Power supply high voltage (Brake booster vacuum sensor)



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. C2007 when the power supply voltage to the brake booster vacuum sensor exceeds a certain value.

PROBABLE CAUSES



  • The designation of the auxiliary battery is incorrect.
  • The auxiliary battery is flat.
  • Loose auxiliary battery terminal
  • Malfunction of on board charger/DC-DC converter
  • 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. Auxiliary battery check


Check the followings.
(1)Is the correct auxiliary battery installed?
Designation of the auxiliary battery: S46B24L(S)
(2)Are the terminals of the auxiliary battery loose?
(3)Is the auxiliary battery flat?

Q. Is the check result normal?

Go to Step 4.
Correct the item concerned. Charge the auxiliary battery if it is flat. (Refer to GROUP 54A - On-vehicle Service for Auxiliary Battery ). Then go to Step 5.

STEP 4. M.U.T.-III other system diagnosis code


Check whether the PHEV-ECU stores the diagnosis code which is related to the on-board charger (OBC) and the DC/DC converter.

Q. Is the check result normal?

Troubleshoot for the relevant diagnosis code.
Go to Step 5.

STEP 5. 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.