Can Communication System Air Conditioning Amplifier Communication Stop Mode

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

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

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Turn the ignition switch off before measuring the resistance of the main wire and the branch wire.
   
2. After the ignition switch is turned off, check that the key reminder warning system and light reminder buzzer are not in operation.
   
3. 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.

1. 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:

   1. w/ Navigation System (for HDD):
      After the ignition switch is turned off, the HDD navigation system requires approximately a minute to record various types of memory and settings. As a result, after turning the ignition switch off, wait a minute or more before disconnecting the cable from the negative (-) battery terminal.
      
   2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
      

1. Disconnect the E41*1 or E42*2 air conditioning amplifier connector.
   

   1. *1: for Automatic Air Conditioning System
      
   2. *2: for Manual Air Conditioning System
      

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

   Standard Resistance:

   for Automatic Air Conditioning System

   Tester Connection	Switch Condition	Specified Condition
   E41-11 (CANH) - E41-12 (CANL)	Ignition switch off	54 to 69 Ω

   for Manual Air Conditioning System

   Tester Connection	Switch Condition	Specified Condition
   E42-8 (CANH) - E42-9 (CANL)	Ignition switch off	54 to 69 Ω

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

   NOTICE:

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

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

   Standard Resistance:

   for Automatic Air Conditioning System

   Tester Connection	Condition	Specified Condition
   E41-14 (GND) - Body ground	Always	Below 1 Ω

   for Manual Air Conditioning System

   Tester Connection	Condition	Specified Condition
   E42-24 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   for Automatic Air Conditioning System

   Tester Connection	Condition	Specified Condition
   E41-21 (B) - Body ground	Always	11to 14 V
   E41-1 (IG+) - Body ground	Ignition switch on (IG)	11to 14 V

   for Manual Air Conditioning System

   Tester Connection	Switch Condition	Specified Condition
   E42-14 (IG+) - Body ground	Ignition switch on (IG)	11 to 14 V
   E42-21 (SBLW) - Body ground	Ignition switch on (IG)	11 to 14 V