Inspection Procedure
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - W/ MOTOR COMPRESSOR ASSEMBLY)
- Disconnect the H33 connector from the HV control ECU.
- Disconnect the C18 w/ motor compressor assembly connector.
- Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.
Standard Voltage
HV CONTROL ECU - W/ MOTOR COMPRESSOR ASSEMBLY (VOLTAGE)Tester Connection Specified Condition CLK (H33-14) - Body ground Below 1 V ITE (H33-15) - Body ground Below 1 V ETI (H33-16) - Body ground Below 1 V STB (H33-18) - Body ground Below 1 V - Turn the ignition switch off.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open)
HV CONTROL ECU - W/ MOTOR COMPRESSOR ASSEMBLY (CHECK FOR OPEN)Tester Connection HV Control ECU - w/ motor compressor assembly Specified Condition CLK (H33-14) - CLK (C18-1) Below 1 Ω ITE (H33-15) - DIN (C18-2) Below 1 Ω ETI (H33-16) - DOUT (C18-3) Below 1 Ω STB (H33-18) - STB1 (C18-4) Below 1 Ω Standard Resistance (Check for short)
HV CONTROL ECU - W/ MOTOR COMPRESSOR ASSEMBLY (CHECK FOR SHORT)Tester Connection HV Control ECU or w/ motor compressor assembly - Body ground Specified Condition CLK (H33-14) - CLK (C18-1) - Body ground 10 kΩ or higher ITE (H33-15) - DIN (C18-2) - Body ground 10 kΩ or higher ETI (H33-16) - DOUT (C18-3) - Body ground 10 kΩ or higher STB (H33-18) - STB1 (C18-4) - Body ground 10 kΩ or higher
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE W/ MOTOR COMPRESSOR ASSEMBLY