Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001543E
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): Pattern Select Switch Eco Mode Circuit; 2018 - 2024 MY Camry HV [07/2017 -        ]

Pattern Select Switch Eco Mode Circuit

DESCRIPTION

When selecting ECO mode, the ECO mode switch (electric parking brake switch assembly) operation signal is sent to the air conditioning amplifier assembly. Following this, ECO mode control is activated for the heater and air conditioning system and the hybrid vehicle control system.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM (CAN BUS CHECK)

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): Pattern Select Switch EV Mode Circuit+

Result

Proceed to

All of the ECUs and sensors that are currently connected to the CAN communication system are displayed.

A

None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed.

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK DTC OUTPUT (HEALTH CHECK)

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): Pattern Select Switch EV Mode Circuit+

Result

Proceed to

No DTCs are output.

A

DTCs are output.

B

B

GO TO DTC CHART

A

3.

READ VALUE USING TECHSTREAM (ECO SWITCH)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / Air Conditioner / Data List / ECO Switch.

Body Electrical > Air Conditioner > Data List

Tester Display

ECO Switch

(d) Read the value displayed on the Techstream.

Result

Proceed to

The Techstream display changes according to the ECO mode switch (electric parking brake switch assembly) operation.

A

The Techstream display does not change according to the ECO mode switch (electric parking brake switch assembly) operation.

B

A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 2018 - 2019 MY Camry HV [07/2017 - 09/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING AMPLIFIER: REMOVAL 2020 - 2024 MY Camry HV [09/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING AMPLIFIER: REMOVAL

B

4.

INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY (ECO MODE)

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HEATING / AIR CONDITIONING: ECO SWITCH: INSPECTION+

NG

REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (ECO MODE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) - BODY GROUND)

(a) Disconnect the K37 ECO mode switch (electric parking brake switch assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K37-16 (GND1) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to ECO Mode Switch (Electric Parking Brake Switch Assembly))

(c) Reconnect the K37 ECO mode switch (electric parking brake switch assembly) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - ECO MODE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY))

(a) Disconnect the K55 air conditioning amplifier assembly connector.

(b) Disconnect the K37 ECO mode switch (electric parking brake switch assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K55-20 (ECOS) - K37-11 (ECU)

Always

Below 1 Ω

K55-20 (ECOS) or K37-11 (ECU) - Body ground

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

*b

Front view of wire harness connector

(to ECO Mode Switch (Electric Parking Brake Switch Assembly))

(d) Reconnect the K37 ECO mode switch (electric parking brake switch assembly) connector.

(e) Reconnect the K55 air conditioning amplifier assembly connector.

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 2018 - 2019 MY Camry HV [07/2017 - 09/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING AMPLIFIER: REMOVAL 2020 - 2024 MY Camry HV [09/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING AMPLIFIER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR