HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0AE411; Hybrid/EV Battery Precharge Contactor Circuit Short to Ground; 2018 - 2024 MY Camry HV [07/2017

DESCRIPTION

The SMRs (System Main Relays) are the relays that connect or disconnect the high-voltage system in accordance with commands from the hybrid vehicle control ECU assembly.

There are 3 SMRs and 1 system main resistor. SMRB, SMRP, SMRG and the system main resistor are located in the HV battery junction block assembly.

To connect to the high voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. To shut off the high voltage power system, SMRB and SMRG are turned off.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0AE411

Hybrid/EV Battery Precharge Contactor Circuit Short to Ground

Short to ground in the SMRP circuit:

Primary circuit of SMRP is malfunctioning.

(2 trip detection logic)

Wire harness or connector
HV battery junction block assembly
Hybrid vehicle control ECU assembly

Does not come on

Master Warning Light:

Comes on

Related Data List

DTC No.

Data List

P0AE411

VL-Voltage before Boosting
VH-Voltage after Boosting
Hybrid Battery Voltage
SMRP Status
SMRB Status
SMRG Status
SMRP Control Status
SMRB Control Status
SMRG Control Status
Boosting Converter Shutdown Status
Generator Inverter Shutdown Status
Motor Inverter Shutdown Status

CONFIRMATION DRIVING PATTERN

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.

Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (READY) and wait for 30 seconds or more.
Turn the power switch off and wait for 2 minutes or more.
Turn the power switch on (IG) and turn the Techstream on.
Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
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 driving pattern again.

WIRING DIAGRAM

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.

Click here

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

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.

PROCEDURE

Tester Connection

Condition

Specified Condition

K69-3 (SMRP) - Body ground

Power switch off

140 to 290 Ω

Result

Proceed to

NG (The connector is not connected securely.)

NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

Tester Connection

Condition

Specified Condition

K69-3 (SMRP) or R22-2 (SMRP) - Body ground and other terminals

Power switch off

10 kΩ or higher