RX 400h FWD V6-3.3L (3MZ-FE) Hybrid (2006)
System Main Relay, Hybrid Drive: Testing and Inspection
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 degrees C (-22 degrees F) to 80 degrees C (176 degrees 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 degrees C (-31 degrees F) to 80 degrees C (176 degrees 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