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
For vehicle with air conditioning or PTC heater only.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
* After the ignition 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 for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1. CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

(a) Turn the ignition switch OFF.

(b) Disconnect the E8 air conditioning amplifier connector.

(c) Measure the resistance.

Standard resistance:

NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (CAN-H, CAN-L)
OK -- Continue to next step.

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

(a) Disconnect the E8 air conditioning amplifier connector.

(b) Measure the resistance.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER