We are currently working on a 2005 CTS-V to repair for our used car line, it came in with a B0064-Left Front Pretensioner Deployment Loop Resistance Low & B0092-Passenger Presence System Performance stored in the SRS module. We replaced both the pretensioner & PPS sensor mat in the passenger seat. Then used our OTC Genysis Evo (with v5.0 OS & 2011 Domestic software package) to clear the DTC's.

The B0092 came back instantly and would not clear, verified new mat was not damaged or faulty. Inspected wiring up to floor connector and found no excessive resistance or damage. Came accross someone mentioning that the rearview mirror could cause this issue, was skeptical but found that the rearview mirror is part of the self-check circuit and goes through the PPS Sensor Mat before going to the SRS module. Tried to check resistance of circuit from rearview mirror to connector, but my Fluke 88 says the circuit is open, yet if I perform a voltage drop test from the Passenger On/Off indicator circuit to the floor connector at the passenger front seat I get a voltage drop of roughly 10volts on the Dark Blue Wire & 5volts on the dark green wire. I cannot find any information to properly test the mirror circuit to verify proper operation.

Paul Walters
Technician
Toyota of Hayward
Hayward, California, USA