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Home >> Lexus >> 2003 >> GX 470 >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Electronic Modulated Suspension & Rear Air Suspension System - Diagnosis >> DTC C1774/74: Power Source Circuit >> Circuit Description

Circuit Description

When turning the ignition switch to ON, the battery positive voltage is input to terminal B and IG of the suspension control ECU. By turning the ignition switch to OFF, the supply of the battery positive voltage to terminal B and IG stops, and the power is turned OFF.

DTC

DTC No. DTC Detecting Condition Trouble Area
C1774/74 The terminal B or IG voltage is detected being below or above a constant voltage for 0.5 seconds.
  • Battery
  • Power source circuit
  • Suspension control ECU
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