HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Operation not Accepted Even If Air Conditioning Switch is Operated; 2018 - 2020 MY Camry [03/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM1000000013PZG
Model Year Start: 2018	Model: Camry	Prod Date Range: [03/2017 - 10/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Operation not Accepted Even If Air Conditioning Switch is Operated; 2018 - 2020 MY Camry [03/2017 - 10/2020]

Operation not Accepted Even If Air Conditioning Switch is Operated

DESCRIPTION

If the air conditioning system cannot be operated using the air conditioning control panel (radio and display receiver assembly)*1 or air conditioning control assembly*2, the following suspected areas may be the cause.

Symptom

Factor

Air conditioning system cannot be operated using air conditioning control panel (radio and display receiver assembly)*1 or air conditioning control assembly*2

(With the exception of the switch indicators, no inputs are reflected when other switches operated)

CAN communication malfunction between air conditioning amplifier assembly and air conditioning control panel (radio and display receiver assembly)*1
LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly*2
Short to +B or ground in air conditioning amplifier assembly circuit
Air conditioning amplifier assembly malfunction
Air conditioning control panel (radio and display receiver assembly) malfunction*1
Air conditioning control assembly malfunction*2
Harness or connector

*1: for 8 Inch Display
*2: for 7 Inch Display

WIRING DIAGRAM

for 8 Inch Display

for 7 Inch Display

PROCEDURE

1.	CONFIRM MODEL

Result	Proceed to
for 8 Inch Display	A
for 7 Inch Display	B

GO TO STEP 6

2.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - POWER SOURCE AND BODY GROUND)

(a) Disconnect the h1 air conditioning control panel (radio and display receiver assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
h1-6 (GND) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
h1-3 (+B) - Body ground	Power switch off	11 to 14 V
h1-10 (ACC) - Body ground	Power switch on (ACC)	11 to 14 V
h1-2 (IG1) - Body ground	Power switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK FOR DTC (AUDIO AND VISUAL SYSTEM)

(a) Check for DTCs.

Body Electrical > Navigation System > Trouble Codes

OK:

DTC B15F9 is not output.

REPLACE AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY)

4.	CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result	Proceed to
CAN communication system DTCs are not output	A
CAN communication system DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Blower Motor

Blower motor with fan sub-assembly

Min.: 0

Max.: 31

Body Electrical > Air Conditioner > Active Test

Tester Display
Blower Motor

OK:

Blower motor with fan sub-assembly operates normally.

REPLACE AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY)

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

6.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

OK:

DTC B14B2 is not output.

GO TO DTC B14B2

7.	CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

*a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)

(a) Disconnect the K54 air conditioning amplifier assembly connector.