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Home >> Toyota >> 2021 >> Avalon Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 158 (Supplemental Restraint System - Diagnostic Codes (B1656-U0154) & Symptom Tests (Hybrid)) >> AIRBAG SYSTEM (for HV Model) >> DTC B1805: Short in P Squib Circuit; DTC B1806: Open in P Squib Circuit; DTC B1807: Short in P Squib Circuit (to Ground); DTC B1808: Short in P Squib Circuit (to +B) [04/2018 -] >> Description

DTC B1805: Short in P Squib Circuit; DTC B1806: Open in P Squib Circuit; DTC B1807: Short in P Squib Circuit (to Ground); DTC B1808: Short in P Squib Circuit (to +B) [04/2018 -]: Description

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

The front passenger squib circuit consists of the airbag ECU assembly and instrument panel passenger airbag assembly.

The airbag ECU assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front passenger squib circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1805 Short in P Squib Circuit
  • The airbag ECU assembly detects a line short in the front passenger squib circuit during the primary check.
  • Front passenger squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1806 Open in P Squib Circuit
  • The airbag ECU assembly detects an open in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1807 Short in P Squib Circuit (to Ground)
  • The airbag ECU assembly detects a short to ground in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1808 Short in P Squib Circuit (to +B)
  • The airbag ECU assembly detects a short to B+ in the front passenger squib circuit.
  • Front passenger squib malfunction
  • Airbag ECU assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger squib (Instrument panel passenger airbag assembly)
  • Airbag ECU assembly
 Comes on Applies to check mode
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