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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 110 (Hybrid Control System (2WD) - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [12/2019 - 11/2023] >> Description

DTC P2530-12: IG2 Signal Circuit Short to Auxiliary Battery [12/2019 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

The hybrid vehicle control ECU compares the IG2 signal to the IG control status signal sent from the certification ECU (smart key ECU assembly) to detect a stuck on malfunction of the IG2 signal.

HINT: 

If DTC P2530-12 is stored, the ignition switch will turn off (READY off).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P2530-12 IG2 Signal Circuit Short to Auxiliary Battery The IG2 signal of the hybrid vehicle control ECU and the IG switch signal sent from the certification ECU (smart key ECU assembly) do not match.
(1 trip detection logic)
  • Auxiliary battery
  • Certification ECU (smart key ECU assembly)
  • Hybrid vehicle control ECU
  • ECM
  • IG2 NO. 1 relay
  • Wire harness or connector
Does not come on Master Warning:
Comes on