DTC    B1498/98    Communication Malfunction (A/C Inverter Local)

for Preparation Click here


DESCRIPTION

The power management control ECU and compressor with motor assembly transmit information to one another via a communication line. Compressor control is stopped and the DTC is stored if communication information is cut off or abnormal information occurs.
The DTC is also detected if high-voltage power supplied from the inverter with converter assembly to the compressor control circuit is shut off.
The output DTC is memorized as previous trouble.

DTC No.
DTC Detection Condition
Trouble Area
B1498/98
  1. Communication line error or open between the power management control ECU and compressor with motor assembly.
  1. High-voltage power source is shut off.
  1. Harness or connector between power management control ECU, compressor with motor assembly and body ground
  2. Power management control ECU
  3. Compressor with motor assembly
  4. No. 2 engine wire (harness or connector between compressor with motor assembly and inverter with converter assembly)
  5. Electric vehicle fuse
  6. CAN communication system
  7. Hybrid control system

WIRING DIAGRAM


E224018E06


INSPECTION PROCEDURE

CAUTION:
  1. Wear electrically insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Be sure to carry the removed service plug grip because other workers may install it by mistake.
  2. Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

NOTICE:
  1. After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work (Click here).
  2. The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the flow chart for the hybrid control system first if any DTCs from those systems are output simultaneously.
  3. Depending on the timing of the power supply to the 12 V power supply circuit and high-voltage circuit when the power switch is turned on (READY), an abnormal information signal may be output, causing this DTC to be stored. If the output DTC is a code that was memorized in the past, check the fuses and wire harnesses. If there is no malfunction, clear the DTC.
  4. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK CAN COMMUNICATION SYSTEM

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

    Result:
    Result
    		Proceed to
    CAN DTC is not output
    		A
    CAN DTC is output
    		B



B
GO TO CAN COMMUNICATION SYSTEM (Click here)
A


2.CHECK DIAGNOSTIC TROUBLE CODE

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

Result:
Result
Proceed to
DTC is not output
A
Only DTC P3108 is output
A
DTCs other than P3108 are output
B



B
GO TO HYBRID CONTROL SYSTEM (Click here)
A


3.CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - BODY GROUND)

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

  1. Disconnect the connector from the compressor with motor assembly.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D12-5 (GND) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY - BATTERY, GROUND)

  1. Turn the power switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    D12-6 (IG1) - D12-5 (GND)
    		Power switch on (IG)
    		11 to 14 V
    D12-6 (IG1) - D12-5 (GND)
    		Power switch off
    		Below 1 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMPRESSOR WITH MOTOR)

  1. Disconnect the connector from the power management control ECU.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D12-1 (CLK) - A19-19 (CLK)
    		Always
    		Below 1 Ω
    D12-2 (DIN) - A19-31 (ITE)
    		Always
    		Below 1 Ω
    D12-3 (DOUT) - A19-30 (ETI)
    		Always
    		Below 1 Ω
    D12-1 (CLK) - Body ground
    		Always
    		10 kΩ or higher
    D12-2 (DIN) - Body ground
    		Always
    		10 kΩ or higher
    D12-3 (DOUT) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.INSPECT ELECTRIC VEHICLE FUSE

CAUTION:
Be sure to wear insulated gloves.

  1. Turn the power switch off.

  1. Remove the service plug grip.

    CAUTION:
    Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

    NOTICE:
    After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) with the service plug grip removed.

  1. Remove the inverter cover.

    NOTICE:
    Be sure to prevent foreign objects or water from entering the inverter with converter assembly.



    E222720E04

  1. Check that bolts A and B are tightened securely.

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

    Standard Resistance:
    Tester Item
    (Tester Connection)
    		Condition
    		Specified Condition
    Electric vehicle fuse
    (A - B)
    		Always
    		Below 1 Ω

    Text in Illustration 
    *a
    		Inverter with Converter Assembly
    *b
    		Electric Vehicle Fuse



NG
REPLACE ELECTRIC VEHICLE FUSE
OK


7.INSPECT NO. 2 ENGINE WIRE

CAUTION:
Be sure to wear insulated gloves.

  1. Disconnect the No. 2 engine wire connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E1-1 (PE) - E2-2 (ACPE)
    		Always
    		Below 1 Ω
    E1-2 (PB) - E2-1 (ACPB)
    		Always
    		Below 1 Ω
    E1-1 (PE) - Body ground
    		Always
    		10 kΩ or higher
    E1-2 (PB) - Body ground
    		Always
    		10 kΩ or higher



NG
REPLACE NO. 2 ENGINE WIRE (Click here)
OK


8.REPLACE COMPRESSOR WITH MOTOR ASSEMBLY

  1. Replace the compressor with motor assembly (Click here).

    HINT:
    Since the compressor with motor assembly cannot be inspected while it is removed from the vehicle, replace the compressor with motor assembly with a new or a known good one and check that the condition returns to normal.

  1. Check for the DTC.

    Result:
    Result
    		Proceed to
    DTC B1498/98 is not output
    		A
    DTC B1498/98 is output
    		B



B
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
A

END (COMPRESSOR WITH MOTOR ASSEMBLY WAS DEFECTIVE)