Important:
* When removing connectors inspect for damage, corrosion or poor connection. Damage or corrosion in the following requires
repair or replacement of the affected component/connector.
* PPS module
* SDM module
* PPS module harness connector
* SDM wiring harness connector
1. Ignition ON, verify that DTC B0081 is the only DTC set in the SDM or PPS module.
锟斤拷 If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify DTC B0081 0F, DTC B0081 3A, DTC B0081 39, or DTC B0081 71 is not set in the SDM. If any of these DTCs set in the SDM
diagnose the following:
* SDM DTC B0081 0F:
锟斤拷 If DTC B0081 0F sets in the SDM then the PPS module will set DTC B0081 4B or DTC B0081 5A. Refer to step #3 and diagnose the
PPS module DTC's. By diagnosing these two DTC's in the PPS module, DTC B0081 0F will be fixed in the SDM.
* SDM DTC B0081 3A:
锟斤拷 Either an incorrect replacement PPS module or SDM was placed in this vehicle. Check and make sure the part #'s are correct for each
module. If both part #'s are correct clear this DTC and see if DTC B0081 3A resets as a current DTC. If DTC B0081 3A resets then
replace the PPS module. Clear DTCs again and check if DTC B0081 3A sets as current again. If DTC B0081 3A sets again then
replace the SDM.
* SDM DTC B0081 39:
锟斤拷 If DTC B0081 39 sets in the SDM then replace the PPS module.
* SDM DTC B0081 71:
锟斤拷 If DTC B0081 71 sets in the SDM check and see if the SDM also sets DTC U0170. If DTC U0170 is set in the SDM then diagnose
DTC U0170. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic
Trouble Code (DTC) List - Vehicle). If DTC U0170 is not set in the SDM then check the connections at the SDM and PPS module.
Clear DTC's and check if DTC B0081 71 sets as current. If DTC B0081 71 sets as current again then replace the PPS module.
3. Verify DTC B0081 4B, or DTC B0081 5A is not set in the PPS module. If either of these DTCs set in the PPS module diagnose the following:
* PPS DTC B0081 4B:
锟斤拷 If DTC B0081 4B sets in the PPS module if the correct calibration was not learned by the PPS module. Perform the Passenger
Presence System Rezeroing procedure. Refer to Passenger Presence System Rezeroing (Tahoe Hybrid and Yukon Hybrid) (See:
Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Programming and Relearning/Passenger Presence System
Rezeroing (Tahoe Hybrid and Yukon Hybrid)).
* PPS DTC B0081 5A:
锟斤拷 If DTC DTC B0081 5A sets in the PPS module check the connections at the SDM and PPS module. Clear the DTC's and check if
DTC B0081 5A sets again in the PPS module. If DTC B0081 5A sets again replace the PPS module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* 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 PPS module and SDM replacement, setup, and
programming
Except Tahoe/Yukon Hybrid (No Denali)
DTC B0081 (Except Tahoe/Yukon Hybrid (No Denali))
