Toyota Corolla Cross: Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range (P33DA1E,P33DB1E)

DESCRIPTION

The HV battery is composed of 60 cells (3.7 V each) in series. The battery ECU assembly monitors the internal resistance of each HV battery cell to detect malfunctions of the HV battery.

HINT:

• These DTCs can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes.
• In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
  • Make sure the air intake port for HV battery is not blocked.
  • Make sure there are no gaps between the connecting parts of the ducts.
  • Clean the No. 1 HV battery intake filter.
    • Clear the DTCs to reset the learning values even if no DTCs are stored.

MONITOR DESCRIPTION

If there is an abnormal internal resistance in the battery cells, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

CONFIRMATION DRIVING PATTERN

HINT:

• After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

  Click here

• When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

  Click here

1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON and turn the GTS on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the ignition switch off and wait for 2 minutes or more.
5. Turn the ignition switch to ON and turn the GTS on.
6. Drive the vehicle on urban roads for approximately 10 minutes.[*1]

   (This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)

   HINT:

   [*1]: Normal judgment procedure.

   The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
8. Check the DTC judgment result.

   HINT:

   • If the judgment result shows NORMAL, the system is normal.
   • If the judgment result shows ABNORMAL, the system has a malfunction.
   • If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

• After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

  Click here

• When disconnecting and reconnecting the auxiliary battery

  HINT:

  When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

  Click here

PROCEDURE

(a) Read the odometer to check the total distance the vehicle has been driven.

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

A

REPLACE HV BATTERY

B

Click here

NEXT

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

READ NEXT: