Air Conditioning Control Panel Circuit

DESCRIPTION

The multi-media module receiver assembly or radio receiver assembly switch signals are sent to the air conditioning amplifier assembly via CAN communication.

WIRING DIAGRAM

for Navigation Receiver Type
for Radio and Display Type

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

Use the GTS to check if the CAN communication system is functioning normally.

Result

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

B

GO TO CAN COMMUNICATION SYSTEM Click here

A

CHECK AVC-LAN COMMUNICATION CIRCUIT
1. Check for an open or short in all AVC-LAN communication circuits.
  - Click here (for Navigation Receiver Type))
  - Click here (for Radio and Display Type))
  OK
  
  There is no open or short circuit.
NG
REPAIR AVC-LAN COMMUNICATION CIRCUIT

OK

OK
There is no open or short circuit.

CHECK HARNESS AND CONNECTOR (POWER SOURCE, GROUND)

Disconnect the H97 multi-media module receiver assembly connector.*1
Disconnect the H90 and H89 radio receiver assembly connectors.*2

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

Standard Voltage

Tester Connection	Condition	Specified Condition
H97-15 (IG) - H97-12 (GND1)*1	Engine switch off	Below 1 V
H97-15 (IG) - H97-12 (GND1)*1	Engine switch on (IG)	11 to 14 V
H97-16 (ACC1) - H97-12 (GND1)*1	Engine switch off	Below 1 V
H97-16 (ACC1) - H97-12 (GND1)*1	Engine switch on (ACC)	11 to 14 V
H97-17 (+B1) - H97-12 (GND1)*1	Always	11 to 14 V
H89-1 (IG) - H90-20 (GND1)*2	Engine switch off	Below 1 V
H89-1 (IG) - H90-20 (GND1)*2	Engine switch on (IG)	11 to 14 V
H90-11 (ACC1) - H90-20 (GND1)*2	Engine switch off	Below 1 V
H90-11 (ACC1) - H90-20 (GND1)*2	Engine switch on (ACC)	11 to 14 V
H90-1 (+B1) - H90-20 (GND1)*2	Always	11 to 14 V

*1: for Navigation Receiver Type
*2: for Radio and Display Type

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H97-12 (GND1) - Body ground*1	Always	Below 1 Ω
H90-20 (GND1) - Body ground*2	Always	Below 1 Ω

*1: for Navigation Receiver Type
*2: for Radio and Display Type

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

AIR CONDITIONING SYSTEM Air Conditioning Control Panel Circuit