3. Ignition ON, test for 4-9 V between the signal circuit terminal 2 and ground.
锟斤拷 If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the
K36 SDM.
锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.
4. If all circuits test normal, replace the B88 seat position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Inflatable Restraint Seat Position Sensor Replacement (with HP2) (See: Restraints and Safety Systems/Air Bag Systems/Seat Position
Sensor/Service and Repair)Inflatable Restraint Seat Position Sensor Replacement (without HP2) (See: Restraints and Safety Systems/Air Bag
Systems/Seat Position Sensor/Service and Repair)
* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)
* Control Module References (See: Testing and Inspection/Programming and Relearning)for SDM replacement, setup, and programming
Tahoe/Yukon Hybrid Minus Denali)
DTC B0081 (Tahoe/Yukon Hybrid Minus Denali)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using the diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0081 0F
- Passenger Presence System Erratic (sets in the SDM)
DTC B0081 3A
- Passenger Presence System Incorrect Component Installed (sets in the SDM)
DTC B0081 4B
- Passenger Presence System Calibration Not Learned (sets in the passenger presence (PPS) module)
DTC B0081 5A
- Passenger Presence System Plausibility Failure (sets in PPS module)
DTC B0081 39
- Passenger Presence System Internal Electronic Failure (sets in SDM)
DTC B0081 71
- Passenger Presence System Invalid Serial Data Received (sets in SDM)
Circuit/System Description
When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs
tests to diagnose critical malfunctions. When the SDM has completed the power-up mode, the SDM will establish communication with the PPS
module. The SDM will also request the instrument panel cluster (IPC) to illuminate both of the PASSENGER AIR BAG ON/OFF indicators ON for
5 seconds. If the SDM determines the correct PPS is installed and functioning normally, the SDM will illuminate the passenger air bags ON or OFF
indicator based on messages from the PPS. The SDM sends a message to the IPC to illuminate the appropriate PASSENGER AIR BAG ON/OFF
indicator.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
All of the following conditions must exist for 5 seconds:
