Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014UG7
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P310715; Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open; 2018 - 2024 MY Camry HV [07/2017 -        ]

DTC

P310715

Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open

DESCRIPTION

Refer to the description for DTC P310711.

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P310711; Lost Communication with Airbag System Control Module Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P310715

Lost Communication with Airbag System Control Module Circuit Short to Auxiliary Battery or Open

Open or short to +B in the communication circuit

Communication from the airbag sensor assembly stopped and Circuit High has been detected for a certain period.

(1 trip detection logic)
  • Wire harness or connector
  • Airbag sensor assembly
  • Hybrid vehicle control ECU assembly

Does not come on

Master Warning Light:

Comes on

Related Data List

DTC No.

Data List

P310715

Airbag Status (Collision)

CONFIRMATION DRIVING PATTERN

HINT:

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

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): UTILITY

  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. With power switch on (IG) and wait for 15 seconds or more.
  7. Enter the following menus: Powertrain / Hybrid Control / 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 or N/A, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P310711.

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P310711; Lost Communication with Airbag System Control Module Circuit Short to Ground+

PROCEDURE

1.

CHECK DTC OUTPUT (SRS AIRBAG)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.

(d) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

Airbag system DTCs are not output.

A

Airbag system DTCs are output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (AIRBAG SYSTEM) 2018 - 2022 MY Camry HV [07/2017 - 08/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 - 2024 MY Camry HV [08/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK AIR BAG SENSOR ASSEMBLY (CHECK WAVEFORM)

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P310711; Lost Communication with Airbag System Control Module Circuit Short to Ground+

Result

Proceed to

The waveform appears as shown in the illustration.

A

The waveform differs from the one shown in the illustration.

B
B

GO TO STEP 6

A

3.

CLEAR DTC

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P06881F; ECM/PCM Power Relay Sense Circuit Intermittent+

NEXT

4.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

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

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

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P310715 is not output.

A

P310715 is output again.

B

(e) Turn the power switch off.

B

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

A

5.

CHECK FOR INTERMITTENT PROBLEMS

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): CHECK FOR INTERMITTENT PROBLEMS

OK

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

6.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P056014; System Voltage (BATT) Circuit Short to Ground or Open+

NG

CONNECT SECURELY
OK

7.

CHECK CONNECTOR CONNECTION CONDITION (AIRBAG SENSOR ASSEMBLY CONNECTOR)

(a) Check the connector connections and contact pressure of the relevant terminals for the K73 airbag sensor assembly connector.

OK:

The connectors are connected securely and there are no contact pressure problems.

*a

Component with harness connected

(Airbag sensor Assembly)
NG

CONNECT SECURELY
OK

8.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the K70 hybrid vehicle control ECU assembly connector.

(b) Disconnect the K73 airbag sensor assembly connector.

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

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

K70-14 (ABFS) - Body ground

Power switch on (IG)

Below 1 V

NOTICE:

Turning the power switch on (IG) with the airbag sensor assembly connector and the hybrid vehicle control ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

*a

Rear view of wire harness connector

(to Hybrid Vehicle Control ECU Assembly)

*b

Front view of wire harness connector

(to Airbag Sensor Assembly)

(e) Turn the power switch off.

(f) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

K70-14 (ABFS) - K73-24 (GSW2)

Power switch off

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

K70-14 (ABFS) or K73-24 (GSW2) - Body ground and other terminals

Power switch off

10 kΩ or higher

(g) Reconnect the K73 airbag sensor assembly connector.

(h) Reconnect the K70 hybrid vehicle control ECU assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

(a) Disconnect the K73 airbag sensor assembly connector.

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

(c) Measure the voltage according to the value(s) in the table below.

NOTICE:

Turning the power switch on (IG) with the airbag sensor assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

Standard Voltage:

Tester Connection

Condition

Specified Condition

K70-14 (ABFS) - Body ground

Power switch on (IG)

11 to 14 V

*a

Component with harness connected

(Hybrid Vehicle Control ECU assembly)

(d) Turn the power switch off.

(e) Reconnect the K73 airbag sensor assembly connector.

NG

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

OK

10.

CHECK HARNESS AND CONNECTOR (AIRBAG SENSOR ASSEMBLY - BODY GROUND)

(a) Disconnect the K73 airbag sensor assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

K73-33 (E1) - Body ground

Power switch off

Below 1 Ω

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

(c) Reconnect the K73 airbag sensor assembly connector.

OK

REPLACE AIR BAG SENSOR ASSEMBLY 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR