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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC C1552: PIG Power Supply Voltage; DTC C1554: Power Supply Relay Failure [12/2019 - 11/2023] >> Description

DTC C1552: PIG Power Supply Voltage; DTC C1554: Power Supply Relay Failure [12/2019 - 11/2023]: Description

When a malfunction is detected in the PIG power source and power supply relay system, the fail-safe function suspends power assist.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1552 PIG Power Supply Voltage PIG power source circuit malfunction
  • EPS fuse
  • Harness or connector
  • Rack and pinion power steering gear assembly
EPS warning light: Comes on Ignition switch is turned to ON again -
C1554 Power Supply Relay Failure Power source relay circuit malfunction
  • EPS fuse
  • Harness or connector
  • Rack and pinion power steering gear assembly
EPS warning light: Comes on Ignition switch is turned to ON again -