Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM100000001HAW6
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [02/2019 - 08/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B14A8,B14A9,B14AA; Glass Temperature Sensor Circuit; 2019 - 2020 MY RAV4 HV [02/2019 - 08/2020]

DTC

B14A8

Glass Temperature Sensor Circuit

DTC

B14A9

Glass Surroundings Temperature Sensor Circuit

DTC

B14AA

Glass Humidity Sensor Circuit

DESCRIPTION

The rain sensor (glass humidity sensor) is attached to front glass window and used for auto control of the air conditioning system.

The air conditioning amplifier assembly receives signals from the rain sensor (glass humidity sensor) via the CAN/LIN communication line.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B14A8

Glass Temperature Sensor Circuit
  • Diagnosis condition: Ignition switch ON
  • Malfunction status: Communication between rain sensor (glass humidity sensor) and main body ECU (multiplex network body ECU) is abnormal or stops
  • Detection time: After ignition switch is turned to ON and 10 seconds elapse, continuously for 5 seconds or more

Rain sensor (glass humidity sensor)

Memorized

B14A9

Glass Surroundings Temperature Sensor Circuit
  • Diagnosis condition: Ignition switch ON
  • Malfunction status: Communication between rain sensor (glass humidity sensor) and main body ECU (multiplex network body ECU) is abnormal or stops
  • Detection time: After ignition switch is turned to ON and 10 seconds elapse, continuously for 5 seconds or more

Rain sensor (glass humidity sensor)

Memorized

B14AA

Glass Humidity Sensor Circuit
  • Diagnosis condition: Ignition switch ON
  • Malfunction status: Communication between rain sensor (glass humidity sensor) and main body ECU (multiplex network body ECU) is abnormal or stops
  • Detection time: After ignition switch is turned to ON and 10 seconds elapse, continuously for 5 seconds or more

Rain sensor (glass humidity sensor)

Memorized

WIRING DIAGRAM

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Click here 2019 - 2025 MY RAV4 HV [02/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): DTC CHECK / CLEAR

Body Electrical > Rain and/or Humidity Sensor > Trouble Codes

Result

Proceed to

DTC B1279 is output

A

DTC B1373 is output

B

DTC B14A8 is output

C

DTC B14A9 is output

DTC B14AA is output
A

GO TO DTC B1279

B

GO TO DTC B1373

C

REPLACE RAIN SENSOR