Diagnostic Instructions
DTC Descriptors
DTC 1049: PPS System Fault Supply Voltage Low
DTC 1050: PPS System Fault Supply Voltage High
Circuit/System Description
The passenger presence system (PPS) is used to monitor the pressure profile of any occupant that is sitting in the front outboard passenger seat and communicates the profile classification to the sensing and diagnostic module (SDM). The SDM will either
enable or suppress the deployment of the instrument panel (I/P) module based on the profile classification of the occupant.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
The PPS module has detected supply battery voltage too low or too high.
Action Taken When the DTC Sets
• | The PPS module will set DTC 1051 and communicate it to the SDM. |
• | The SDM will set DTC B0081 and request the instrument panel cluster (IPC) to illuminate the AIR BAG indicator. |
• | The SDM will disable the I/P module deployment loop. |
• | The PPS module will illuminate the passenger air bag status OFF indicator. |
Conditions for Clearing the DTC
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once 100 malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
SIR Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
With the passenger seat occupied and unoccupied the inflatable restraint passenger air bag on/off indicator should switch states within 5 seconds.
Circuit/System Testing
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
• | PPS module wiring harness |
- Verify DTC 1050 is not set.
- Ignition OFF, disconnect the harness connector at the PPS module.
- Ignition OFF, test for less then 1 ohm between the ground circuit terminal D and ground.
⇒ | If greater then the specified range, test the ground circuit for an open/high resistance. |
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A and ground.
⇒ | If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. |
- If all circuits test normal, replace the PPS module.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.