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a DTC will set. When the sensing and diagnostic module (SDM) detects this DTC within the Conditions for Running the DTC Ignition voltage is between 9-16 volts. Conditions for Setting the DTC The PPS detects the voltage at the PPS sensor signal is less than 0.5 volt or greater than 4.5 The PPS detects the voltage at the PPS sensor 5 volt reference is less than 4.5 volts or The PPS detects the amperage at the PPS sensor low reference is 25 mA or greater for 500 Action Taken When the DTC Sets The PPS will set a DTC, and then communicate with the SDM. The SDM disables the I/P module deployment loop. The PPS will turn on the passenger air bag status OFF indicator. The SDM commands the AIR BAG indicator ON. Conditions for Clearing the DTC The condition for setting the DTC no longer exists. A history DTC will clear once 100 malfunction-free ignition cycles have occurred. Reference Information Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Circuit/System Testing
2008 Chevrolet Silverado 1500 2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Ignition OFF, disconnect the harness connector at the PPS pressure sensor and inspect the component and harness sides for damage or corrosion. If damage or corrosion is found, repair or replace as necessary. 2. Ignition ON, test for 4.5-5.5 volts between the voltage reference circuit terminal A and ground. If less that the specified range, test the voltage reference circuit for open/high If greater that the specified range, test the voltage reference circuit for a short to 3. Ignition OFF, remove the AIR BAG BATT Fuse. Test for less than 2.0 ohms between low reference terminal C and ground. If greater than the specified range, test the low reference circuit for open/high 4. Ignition OFF, disconnect the harness connector at the PPS module. 5. Test for infinite resistance between the signal circuit terminal B and ground. If less than the specified value, test the signal circuit for a short to ground. 6. Ignition ON, test for less than 1 volt between the signal circuit terminal B and ground. If greater than the specified range, test the signal circuit for a short to voltage. IMPORTANT: The PPS pressure sensor is not serviced separately. The When removing connectors, inspect for damage or The PPS pressure sensor The PPS module The PPS pressure sensor wiring harness connector The PPS module wiring harness connector IMPORTANT: The AIR BAG BATT Fuse that supplies B+ voltage must be removed to ensure the PPS module is inactive. An active PPS
2008 Chevrolet Silverado 1500 2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
7. Test for less than 1 ohm in the signal circuit between PPS module terminal 6 and PPS sensor terminal B. If greater than the specified range, test the signal circuit for open/high resistance. If the 8. If all circuits test normal, replace the PPS which includes the pressure sensor. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. SIR/SRS Wiring Repairs Control Module References for PPS replacement, setup, and programming DTC B0079 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using the diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B0079 01 LF Seat Position Sensor Circuit Short to Battery DTC B0079 02 LF Seat Position Sensor Circuit Short to Ground DTC B0079 04 LF Seat Position Sensor Circuit Open DTC B0079 06 LF Seat Position Sensor Circuit Short to Ground or Open Circuit DTC B0079 08
2008 Chevrolet Silverado 1500 2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
LF Seat Position Sensor Circuit Signal Invalid Diagnostic Fault Information Circuit/System Description The inflatable restraint seat position sensor (SPS) is used to determine the proximity of a front Conditions for Running the DTC Ignition voltage is between 9-16 volts. Conditions for Setting the DTC B0079 01 The SDM detects the SPS circuit is shorted to voltage for 500 milliseconds. B0079 06 The SDM detects the SPS circuit is shorted to ground or an open occur for 500 milliseconds. Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance Seat Position Sensor Left B0079 02, 06 B0079 04 B0079 04 B0079 01 B0079 08 Seat Position Sensor Left B0079 02, 06 B0079 04 B0079 04 B0079 01 B0079 08
2008 Chevrolet Silverado 1500 2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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