DTC 065
DTC 065
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC 065
- Passenger Presence Sensor Circuit Out of Range
Diagnostic Fault Information
Circuit/System Description
The passenger presence system (PPS) uses a silicone filled sensor pad located underneath the passenger seat foam cushion and is connected by a hose clamp to a passenger presence sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the passenger presence sensor. The passenger presence sensor is a 3-wire sensor consisting of a power, ground, and signal circuit. The passenger presence module continually monitors itself and if a fault in this circuit occurs, DTC 065 will set. When the passenger presence module detects this DTC within the PPS, it will notify the customer of the enable/disable status by illuminating the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators.
Then the PPS will communicate to the inflatable restraint sensing and diagnostic module (SDM) through a serial data communications circuit that a PPS fault is present. The SDM will then set DTC B0081 indicating a problem within the PPS and will suppress the deployment of the passenger instrument panel air bag and then illuminate the AIR BAG warning indicator.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
* The passenger presence module detects the voltage at the passenger presence sensor signal is less than 0.5 volt or greater than 4.5 volts for 500 milliseconds.
* The passenger presence module detects the voltage at the passenger presence sensor 5-volt reference is less than 4.5 volts or greater than 9.1 volts for 500 milliseconds.
* The passenger presence module detects the amperage at the passenger presence sensor low reference is 25 ma or greater for 500 milliseconds.
Action Taken When the DTC Sets
* The passenger presence module will set a DTC, and then communicate with the SDM.
* The SDM will set DTC B0081.
* The SDM disables the passenger instrument panel air bag deployment loop.
* The passenger presence module will illuminate the passenger air bag status OFF indicator.
* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning indicator.
Conditions for Clearing the DTC
DTC 065 is an indication that the passenger presence module is out of calibration or failed a rezero attempt. You cannot recalibrate the passenger presence module. Only replace the passenger presence module after following the instructions in the Circuit/System Testing.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
SIR System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
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 component/connector.
* Passenger presence module
* SDM
* Passenger presence module wiring harness connector
* SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the passenger presence sensor.
2. Ignition OFF, test for less than 1.0 ohm between the low reference circuit terminal C and ground.
• If not within the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the passenger presence module.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
• If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the passenger presence module.
• If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the passenger presence module.
4. Ignition OFF, disconnect the harness connector at the passenger presence module.
5. Ignition OFF, test for infinite resistance between the signal circuit terminal B and ground.
• If not the specified value, test the signal circuit for a short to ground.
6. Ignition ON, test for less than 1.0 volt between the signal circuit terminal B and ground.
• If not within the specified range, test the signal circuit for a short to voltage.
7. Test for less than 1.0 ohm between the signal circuit terminal B at the sensor harness connector and terminal 6 at the passenger presence module harness connector.
• If greater than the specified range, test the signal circuit for an open/high resistance.
8. If all circuits test normal, test or replace the passenger presence sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning)for passenger presence module, passenger presence sensor replacement, setup, and programming