Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure (P1CFF62)

DTC SUMMARY

MALFUNCTION DESCRIPTION

If there is a large difference between the reactor current sensor value and the HV battery current sensor value, a malfunction will be detected.

• Current sensor malfunction
• Inverter with converter assembly internal circuit malfunction

DESCRIPTION

MONITOR DESCRIPTION

If the motor generator control ECU detects a large difference between the reactor current sensor value and battery current sensor value, it 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.

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

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1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off and wait for 2 minutes or more.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Turn the power switch on (IG) and wait for 5 seconds or more. [*1]
7. Turn the power switch on (READY) and wait for 5 seconds or more. [*2]
8. With the brake pedal depressed, depress the accelerator pedal to start the engine. [*3]
9. Wait for approximately 10 seconds while depressing the brake pedal and accelerator pedal. [*4]

   HINT:

   [*1] to [*4]: Normal judgment procedure.

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

10. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
11. 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 or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

• Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
  • Inspecting the high-voltage system
  • Disconnecting the low voltage connector of the inverter with converter assembly
  • Disconnecting the low voltage connector of the HV battery
• To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
• After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
• After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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  HINT:

  Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

  

  *a	Without waiting for 10 minutes

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.

(d) Check for DTCs.

HINT:

• P1CFF62 may be output as a result of the malfunction indicated by the DTCs above.
  1. The chart above is listed in inspection order of priority.
  2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

C

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)

A

(a) Ensure the safety of the areas in front and at the back of the vehicle.

(b) Apply the parking brake and secure the wheels using chocks.

(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (READY).

(e) Depress the brake pedal firmly with your left foot.

(f) Move the shift lever to D.

(g) Enter the following menus: Powertrain / Motor Generator / Data List / Hybrid/EV Battery System Current, Inverter Input Current, WIN Control Limit Power.

HINT:

Perform this procedure while making sure that the absolute value of the Data List item WIN Control Limit Power remains higher than 20 kW.

(h) Depress the brake pedal firmly with your left foot and fully depress the accelerator pedal for 5 seconds, and then release it.

CAUTION:

Make sure to fully apply the parking brake and firmly depress the brake pedal to prevent the vehicle from moving.

(i) According to the display on the Techstream, read the Data List and monitor the values of "Hybrid/EV Battery System Current" and "Inverter Input Current".

(j) Turn the power switch off.

B

REPLACE INVERTER WITH CONVERTER ASSEMBLY

C

GO TO DTC CHART (P0ABF00)

A

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A

REPLACE INVERTER WITH CONVERTER ASSEMBLY

B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR