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2007 RESTRAINTS Supplemental Restraint System - Sequoia

Lexus B1400

2007 RESTRAINTS Supplemental Restraint System - Sequoia

OK: USE SIMULATION METHOD TO CHECK

DTC B1815/54 SHORT IN FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT; DTC B1816/54 OPEN IN FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT; DTC B1817/54 SHORT TO GND IN FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT; DTC B1818/54 SHORT TO B+ IN FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT

DESCRIPTION

The P squib (Dual stage - 2nd step) circuit consists of the center airbag sensor assembly and the front passenger airbag assembly.

The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the P squib (Dual stage - 2nd step) circuit.

DIAGNOSTIC TROUBLE CODE CHART

DTC No.

DTC Detection Condition

Trouble Area

B1815/54

• The center airbag sensor assembly receives a line short circuit signal 5 times in the P squib (Dual stage -2nd step) circuit during primary check.

• P squib malfunction

• Center airbag sensor assembly malfunction

• Front passenger airbag assembly (P quib, Dual stage - 2nd step)

• Center airbag sensor assembly

• Cowl wire

B1816/54

• The center airbag sensor assembly receives an open circuit signal in the P squib (Dual stage - 2nd step) circuit for 2 seconds.

• P squib malfunction

• Center airbag sensor assembly malfunction

• Front passenger airbag assembly (P squib, Dual stage - 2nd step)

• Center airbag sensor assembly

• Cowl wire

B1817/54

• The center airbag sensor assembly receives a short circuit to ground signal in the P squib (Dual stage -2nd step) circuit for 0.5 seconds.

• P squib malfunction

• Center airbag sensor assembly malfunction

• Front passenger airbag assembly (P squib, Dual stage - 2nd step)

• Center airbag sensor assembly

• Cowl wire

B1818/54

• The center airbag sensor assembly receives a short to B+ circuit signal in the P squib (Dual stage - 2nd step) circuit for 0.5 seconds.

• P squib malfunction

• Center airbag sensor assembly malfunction

• Front passenger airbag assembly (P squib, Dual stage - 2nd step)

• Center airbag sensor assembly

• Cowl wire

WIRING DIAGRAM

WIRING DIAGRAM

2007 RESTRAINTS Supplemental Restraint System - Sequoia

Center Airbag Sensor Assembly

A22 P Squib

Y-R

<

3

Y-G

Center Airbag Sensor Assembly

f

P2+

P2-

V-

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