Code No.P1992: Abnormality in shift lever position (main) power supply



caution Whenever ECU is replaced, ensure that the CAN bus lines are normal.

TROUBLE JUDGEMENT


The PHEV-ECU stores this diagnosis code when the power circuits to the shift sensor (main) and the select sensor (main) fail.

PROBABLE CAUSES



  • The selector lever assembly fails (relevant sensor power circuit fails)
  • Damaged harness or connector
  • Malfunction of PHEV-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list


Check that the following data list display contents are normal (Refer to ).
Data list
  • Item 152: Shift sensor 1 voltage
OK: 5 V with the power supply mode of the electric motor switch turned on

Q. Is the check result normal?

Go to Step 4.
Go to Step 2.

STEP 2. Check of short to power supply and short to earth circuit in the signal line. (Selector lever assembly and PHEV-ECU).



  • Check the wiring harness selector lever assembly terminal No. 9 and PHEV-ECU (SFV connector) connector.

Q. Is the check result normal?

Go to Step 3.
Repair the connector or wiring harness.

STEP 3. Selector lever assembly check


Refer to GROUP 22D - Selector Lever Assembly Check .

Q. Is the check result normal?

Go to Step 4.
Replace the selector lever assembly (Refer to GROUP 22D - Selector Lever Assembly ).

STEP 4. 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 trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).