CAN COMMUNICATION SYSTEM Air Conditioning Amplifier Communication Stop Mode

DESCRIPTION

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   PRECAUTION

   Note:

   After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).

   
   
   • NEXTClick here
2. Click here

   DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

   
   

   1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and CAN branch wire.

      CAUTION:

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

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

   
   
   • NEXTClick here
3. Click here

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

   
   
   1. 

      Disconnect the air conditioning amplifier assembly connector.

      Table 1. Text in Illustration

      *A	for Automatic Air Conditioning System	*B	for Manual Air Conditioning System or w/o Air Conditioning System
      *a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)	-	-

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

      Standard Resistance
      Table 2. for Automatic Air Conditioning System Tester Connection Switch Condition Specified Condition H46-11 (CANH) - H46-12 (CANL) Ignition switch off 54 to 69 Ω
      Table 3. for Manual Air Conditioning System or w/o Air Conditioning System Tester Connection Switch Condition Specified Condition H118-8 (CANH) - H118-9 (CANL) Ignition switch off 54 to 69 Ω

   
   
   • OKClick here
   • NGClick here
4. Click here

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

   
   
   1. 

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

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

      Table 4. Text in Illustration

      *A	for Automatic Air Conditioning System	*B	for Manual Air Conditioning System or w/o Air Conditioning System
      *a	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)	-	-

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

      Standard Resistance
      Table 5. for Automatic Air Conditioning System Tester Connection Condition Specified Condition H46-14 (GND) - Body ground Always Below 1 Ω
      Table 6. for Manual Air Conditioning System or w/o Air Conditioning System Tester Connection Condition Specified Condition H118-23 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Table 7. for Automatic Air Conditioning System Tester Connection Condition Specified Condition H46-21 (B) - Body ground Always 11 to 14 V H46-1 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Table 8. for Manual Air Conditioning System or w/o Air Conditioning System Tester Connection Switch Condition Specified Condition H118-1 (IG+) - Body ground Ignition switch ON 11 to 14 V

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

6. Click here

   REPAIR OR REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR