DTC 036

DTC 036

CIRCUIT DESCRIPTION
The inflatable restraint passenger presence system (PPS) continuously monitors itself for critical faults. If the PPS determines that there is a communication fault or battery voltage has fallen below a threshold causing a communication fault, the PPS will set DTC 036, turn the passenger air bag status indicator to OFF. Then the PPS will try to communicate with the sensing and diagnostic module (SDM) through a non class 2 communications circuit that a PPS fault is present. The SDM will then turn the air bag indicator to ON, and set DTC B0092 indicating a problem within the PPS and will suppress the deployment of the instrument panel (I/P) module.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC 036 Communication Fault

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
- The PPS has lost communications with the SDM.
- The PPS receives incorrect messages.
- The SDM has lost or receive no communications with the PPS.
- Battery voltage outside the range of 8-18 volts.

ACTION TAKEN WHEN THE DTC SETS
- The PPS will set a DTC 036, then communicate with the SDM via non class 2 circuit.
- The SDM will set DTC B0092.
- The SDM disables the I/P deployment loop.
- The PPS will turn ON the passenger air bag status OFF indicator.
- The SDM commands the AIR BAG indicator ON via class 2 serial data.

CONDITIONS FOR CLEARING THE DTC
- The condition responsible for setting the DTC no longer exists.
- You issue a scan tool CLEAR DTCs command.
- A history DTC will clear once 255 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
This fault indicates that there is either a communication or battery voltage problem. If this DTC sets intermittently, check the power, ground and communication circuits.

TEST DESCRIPTION

Steps 1-11:

Step 12:

The number below refer to the step numbers on the diagnostic table.
2. This step is requesting the PPS to flash internal DTCs, checking to see if DTC 036 is current.
7. Test the occupant sensor serial data circuit for a short to ground, a high resistance, or an open.
8. Test the occupant sensor serial data circuit for a short to voltage.