Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000012SCL
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 -           ]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: TERMINALS OF ECU; 2018 - 2024 MY Camry [03/2017 -        ]

TERMINALS OF ECU

CHECK WINDSHIELD WIPER MOTOR ASSEMBLY

(a) Disconnect the A31 windshield wiper motor assembly connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A31-4 (+B) - Body ground

SB - Body ground

Ignition switch ON signal (Power source circuit)

Ignition switch ON

11 to 14 V

Less than approximately 60 seconds after ignition switch turned off

Approximately 60 seconds after ignition switch turned off

Below 1 V

A31-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Connect the A31 windshield wiper motor assembly connector.

HINT:

Since the A31 windshield wiper motor assembly connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A31-3 (2S) - Body ground

B - Body ground

Windshield wiper motor assembly HI operation signal

Windshield wiper motor assembly stopped

11 to 14 V

Windshield wiper motor assembly operating in HI

Below 1 V

A31-2 (LIN) - Body ground

R - Body ground

LIN communication signal

Ignition switch ON

Pulse generation

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

3B-3 - Body ground

LA - Body ground

Ground

Always

Below 1 Ω

3C-1 - Body ground

LG - Body ground

Battery power supply

Always

11 to 14 V

3F-1 - Body ground

W - Body ground

Battery power supply

Always

11 to 14 V

(c) Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

3C-2 - Body ground

R - Body ground

Washer circuit IG power source

Ignition switch ON

11 to 14 V

K51-3 (LIN3) - Body ground

BE - Body ground

LIN communication line

Ignition switch ON

Pulse generation

K51-12 (FWSR) - Body ground

L - Body ground

WASHER Relay operation signal

Ignition switch ON, front washer switch off

11 to 14 V

Ignition switch ON, front washer switch on

Below 2 V

K52-21 (WPS) - Body ground

LG - Body ground

WIPER Relay operation signal

Ignition switch ON

11 to 14 V

Less than approximately 60 seconds after ignition switch turned off

Approximately 60 seconds after ignition switch turned off

Below 1 V

CHECK COMBINATION METER ASSEMBLY

Click here 2018 MY Camry [03/2017 - 06/2017]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU 2018 MY Camry [06/2017 - 08/2018]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU 2019 - 2020 MY Camry [08/2018 - 03/2020]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU 2020 MY Camry [03/2020 - 10/2020]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU 2021 - 2024 MY Camry [10/2020 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: TERMINALS OF ECU