Air Conditioning System
DTC B1498/98 Communication Malfunction (A/C Inverter Local)DESCRIPTION
DTC Detection Condition:
The hybrid vehicle control ECU and compressor with motor assembly transmit information to one another via a communication line. Compressor control is stopped and the DTC is output 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.
CAUTION:
- 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.
- Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
NOTE: Depending on the timing of the power supply to the 12 Vpower 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, erase the DTC.
Wiring Diagram:
Step 1-3:
Step 4-5:
Step 5 (Continued)-7:
Step 7 (Continued)-8:
Step 8 (Continued):
Step 9-10:
Step 10 (Continued):
INSPECTION PROCEDURE
CAUTION:
- 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.
- Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
NOTE: Depending on the timing of the power supply to the 12 Vpower 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, erase the DTC.