AIR CONDITIONING SYSTEM, Diagnostic DTC:B1473/73

DESCRIPTION

The inverter activation signal is sent to the compressor with motor assembly from the hybrid vehicle control ECU. Compressor control is stopped and the DTC is output if there is an open or short in the signal circuit.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK DTC (CAN COMMUNICATION SYSTEM)

   
   

   1. Use the intelligent tester to check if the CAN communication system is functioning normally.

      Table 1. Result

      Result	Proceed to
      CAN DTC is not output	A
      CAN DTC is output (for LHD)	B
      CAN DTC is output (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
2. Click here

   CHECK DTC

   
   

   1. Check if DTCs for the air conditioning system and the hybrid control system are output using the intelligent tester.

      Table 2. Result

      Result	Proceed to
      Only DTC B1473 is output	A
      DTCs B1473 and P3108-538 are output simultaneously (B1498 is not output)
      DTCs B1473 and B1498 are output simultaneously (P3108-538 is not output)	B
      DTCs B1473, B1498 and P3108-538 are output simultaneously
      DTCs other than P3108-538 are output for hybrid control system	C

   
   
   • AClick here
   • BClick here
   • CClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - COMPRESSOR WITH MOTOR ASSEMBLY)

   
   
   1. 

      Disconnect the E58 hybrid vehicle control ECU connector.

   2. Disconnect the E59 compressor with motor assembly connector.

      CAUTION:

      Do not disconnect the connector on the high-voltage side.

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

      Standard resistance
      Tester Connection Condition Specified Condition E59-2 (STB1) - E58-31 (STB) Always Below 1 Ω E58-31 (STB) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT COMPRESSOR WITH MOTOR ASSEMBLY

   
   
   1. 

      Disconnect the E58 hybrid vehicle control ECU connector.

   2. Reconnect the E59 compressor with motor assembly connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition E58-31 (STB) - Body ground Power switch ON (IG) 11 to 14 V Power switch OFF Below 1 V

   
   
   • OKClick here
   • NGClick here
5. Click here

   GO TO CAN COMMUNICATION SYSTEMClick here

6. Click here

   GO TO DTC B1498/98Click here

7. Click here

   GO TO HYBRID CONTROL SYSTEMClick here

8. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. Click here

   REPLACE COMPRESSOR WITH MOTOR ASSEMBLYClick here

10. Click here

    REPLACE HYBRID VEHICLE CONTROL ECUClick here

11. Click here

    GO TO CAN COMMUNICATION SYSTEMClick here