Code No. P1A15: High-voltage system error (1)


REGULAR CHARGING CONTROL SYSTEM CIRCUIT



OPERATION



DIAGNOSIS CODE SET CONDITIONS



  • If the charging time of the smooth condenser in the MCU reaches the specified time or more, the diagnosis code No. P1A15 will be set.

PROBABLE CAUSES



  • Damaged wiring harness or connector(s)
  • Malfunction of the high-voltage fuse No.1 (Main, 280A) (main battery assembly)
  • Malfunction of the main battery assembly
  • Malfunction of the MCU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
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 line. (Refer to GROUP 54C - Troubleshooting .) Then go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines
Check again if the diagnosis code No. P1A15 is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Set the electric motor switch to the "START" position, and start the electric motor unit.
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Go to Step 3.
This diagnosis is complete.

STEP 3. High-voltage fuse No.1 (Main,280A) (main battery assembly) check
Check the high-voltage fuse No.1 (Main, 280A). (Refer to .)

Q. Is the check result normal?
Go to Step 4.
Replace the high-voltage fuse No.1 (Main, 280A).

STEP 4. Connector check: G-18, G-19 main battery connector, G-05, G-06 MCU connector
danger When servicing the high voltage system parts, always shut off the high voltage by removing the service plug (refer to ).
danger Be sure to wear the specified protective equipment when removing the service plug.

Q. Is the check result normal?
Go to Step 5.
Replace the wiring harness.

STEP 5. Check the wiring harness between G-05, G-06 MCU connector terminal and G-18, G-19 main battery connector terminal.
danger When servicing the high voltage system parts, always shut off the high voltage by removing the service plug (refer to ).
danger Be sure to wear the specified protective equipment when removing the service plug.
Check the high-voltage line for open circuit.

Q. Is the check result normal?
Go to Step 6.
Replace the wiring harness.

STEP 6. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Set the electric motor switch to the "START" position, and start the electric motor unit.
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the main battery assembly. (Refer to .) Then go to Step 7.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

STEP 7. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Set the electric motor switch to the "START" position, and start the electric motor unit.
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Return to Step 1.
The diagnosis is complete.