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Home >> Lexus >> 2008 >> RX 400h AWD V6-3.3L (3MZ-FE) Hybrid >> Repair and Diagnosis >> Hybrid Drive Systems >> Power Control System >> System Main Relay, Hybrid Drive >> Testing and Inspection >> HV Relay Assembly
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HV Relay Assembly








P310 HYBRID BATTERY CONTROL: HV RELAY ASSEMBLY:

INSPECTION

1. SMR1 AND SYSTEM MAIN RESISTOR






(a) Measure the resistance between the 3 (CON1) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly.
Standard resistance:
70 to 165 Ohms (at -30 °C (-22°F) to 80 °C (176°F))
(b) Increase battery voltage between the 3 (CON1) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly, and measure the resistance between the terminal of the HV battery side positive connector and the w/ convertor inverter assembly side positive terminal of the HV relay assembly.
HINT: The standard resistance indicates the resistance of the system main resistor.

Standard resistance:
28.5 to 31.5 Ohms
2. SMR2






(a) Measure the resistance between the 1 (CON2) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly.
Standard resistance:
20 to 60 Ohms (at -35°C (-31°F) to 80°C (176°F))
(b) Increase battery voltage between the 1 (CON2) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly, and measure the resistance between the terminal of the HV battery side positive connector and the w/ converter inverter assembly side positive terminal of the HV relay assembly.
Standard resistance:
Below 1 Ohms
3. SMR3






(a) Measure the resistance between the 2 (CON3) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly.
Standard resistance:
20 to 60 Ohms (at -35°C (-31°F) to 80°C (176°F))
(b) Increase battery voltage between the 2 (CON3) and 4 (GND) terminals of the connector for the relay drive of the HV relay assembly, and measure the resistance between the terminal of the HV battery side negative connector and the w/ converter inverter assembly side negative terminal of the HV relay assembly.
Standard resistance:
Below 1 Ohms
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