Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONB CODE CHARTSB1908
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
B1908
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION B1908
DTC B1908/74 Short to B+ in Front Pretensioner Squib LH Circuit
DESCRIPTION

The P/T squib LH circuit consists of the center airbag sensor assembly and the front seat outer belt LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the P/T squib LH circuit.









INSPECTION PROCEDURE
HINT:
- Perform the simulation method by selecting the check mode with the intelligent tester.
- After selecting the check mode, perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road.
CAUTION: Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag deployment.
1. Turn the ignition switch to the LOCK position.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the connectors from the center airbag sensor assembly.
4. Disconnect the connectors from the steering wheel pad.
5. Disconnect the connectors from the front passenger airbag assembly.
6. with Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
7. with Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
8. Disconnect the connectors from the front seat outer belt LH and RH.
DESCRIPTION
DTC Detection Condition:
The P/T squib LH circuit consists of the center airbag sensor assembly and the front seat outer belt LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the P/T squib LH circuit.
Wiring Diagram:
Step 1-2:
Step 3:
Step 4:
Step 5:
Step 6-7:
Step 8:
Step 9-10:
Step 10(Continued)-11:
Step 12:
INSPECTION PROCEDURE
HINT:
- Perform the simulation method by selecting the check mode with the intelligent tester.
- After selecting the check mode, perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road.
CAUTION: Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag deployment.
1. Turn the ignition switch to the LOCK position.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Disconnect the connectors from the center airbag sensor assembly.
4. Disconnect the connectors from the steering wheel pad.
5. Disconnect the connectors from the front passenger airbag assembly.
6. with Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
7. with Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
8. Disconnect the connectors from the front seat outer belt LH and RH.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.