Air Conditioning Amplifier Communication Stop Mode

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

DESCRIPTION





WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
* Turn the ignition switch off before measuring the resistance of the main wire and the branch wire.
* After the ignition switch is turned off, check that the key reminder warning system and light reminder buzzer 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. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

NEXT -- Continue to next step.

2. CHECK FOR OPEN IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

(a) Disconnect the E37*1 or E36*2 air conditioning amplifier assembly connector.

* *1: for Automatic Air Conditioning System

* *2: for Manual Air Conditioning System





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

Standard Resistance:

for Automatic Air Conditioning System
for Manual Air Conditioning System










NG -- REPAIR OR REPLACE AIR CONDITIONING AMPLIFIER BRANCH WIRE OR CONNECTOR (CANH, CANL)
OK -- Continue to next step.

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

(a) Connect the cable to the negative (-) battery terminal.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

(b) Disconnect the E37*1 or E36*2 air conditioning amplifier connector.

* *1: for Automatic Air Conditioning System

* *2: for Manual Air Conditioning System





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

Standard Resistance:

for Automatic Air Conditioning System
for Manual Air Conditioning System










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

Standard Voltage:

for Automatic Air Conditioning System
for Manual Air Conditioning System










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal