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Home >> Lexus >> 2010 >> IS 250C Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control (Diagnostic Codes (P0171-P062F) >> SFI System >> DTC P0617: Starter Relay Circuit High >> Monitor Description

Monitor Description

While the engine is being cranked, positive battery voltage is applied to terminal STA of the ECM.

If the ECM detects the starter (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then illuminates the MIL and sets the DTC.

This monitor runs when the vehicle is driven at 12.43 mph (20 km/h) or more for over 20 seconds.

DTC No. DTC Detection Condition Trouble Area
P0617 When conditions (a), (b) and (c) are met, positive (+B) battery voltage 10.5 V or more is applied to ECM for 20 seconds (1 trip detection logic):
  • (a) Vehicle speed is 12.43 mph (20 km/h) or more
  • (b) Engine speed is 1000 RPM or more
  • (c) STA signal is on
  • Cranking holding function circuit
  • Starter signal circuit
  • Park/neutral position switch assembly*1
  • ECM

*1: Automatic transmission models.