Air Conditioning Amplifier Communication Stop Mode

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Air Conditioning Amplifier Communication Stop Mode
- Air Conditioning Amplifier Communication Stop Mode

DESCRIPTION

HINT
"Air Conditioner" refers to the circuit that includes the air conditioning amplifier.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* Turn the engine switch off before measuring the resistance of CAN bus main wires and CAN bus branch wires.
* After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches, or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT
Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

PROCEDURE

1. CHECK FOR OPEN IN CAN NO. 1 BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

(a) Turn the engine switch off.

(b) Disconnect the air conditioning amplifier connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE CAN NO. 1 BUS BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (IG+, B, GND)

(a) Disconnect the air conditioning amplifier connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER Removal