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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 259 (Power Steering System (Hybrid) - Diagnostic Codes & Circuit Tests) >> POWER STEERING SYSTEM (for HV Model) >> DTC C1581: Assist Map Number Un-Writing [06/2018 - ] >> Description

DTC C1581: Assist Map Number Un-Writing [06/2018 - ]: Description

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This DTC will be stored if the power steering ECU (rack and pinion power steering gear assembly) determines that the assist map is not written in the ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1581 Assist Map Number Un-Writing Assist map not written in power steering ECU (rack and pinion power steering gear assembly)
  • CAN communication system
  • Hybrid vehicle control ECU
  • Skid control ECU (Brake booster with master cylinder assembly)
  • Rack and pinion power steering gear assembly
EPS warning light: Comes on Assist Map Writing is performed or the power switch is turned on (IG) again -