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Home >> Lexus >> 2009 >> LS 600hL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P1606-308 - U0424-537) & Circuit Tests) >> Hybrid Control System >> DTC P3110-139: IGCT Relay Malfunction >> Inspection Procedure

Inspection Procedure

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If battery voltage is applied to terminal MREL of the hybrid vehicle control ECU, even though the power switch is off, +B power source voltage will be applied to terminals +B and +B2 of the hybrid vehicle control ECU.