Diagnostic Instructions
DTC Descriptor
DTC 036 : Communication Fault
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Serial Data
| B0081, 036
| B0081, 036
| B0081, 036
| --
|
Circuit/System 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 the PPS module will set DTC 036.
The PPS module illuminates the PASSENGER AIR BAG OFF indicator and notifies the sensing and diagnostic module (SDM) that a fault is present when the DTC sets. The SDM will set DTC B0081 indicating a PPS fault and request the instrument panel cluster
(IPC) to illuminate the AIR BAG indicator. The SDM will also disable the deployment of the I/P inflator module.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
| • | The PPS has lost communications with the SDM. |
| • | The PPS receives incorrect messages. |
| • | Battery voltage outside the range of 8-18 volts. |
Action Taken When the DTC Sets
| • | The PPS will set a DTC 036 and communicate to the SDM that a PPS DTC has set. |
| • | The PPS will also set DTC 056 indicating that a PPS internal system fault has occurred. DTC 052 will remain current until the rezeroing procedure has been successfully performed. |
| • | The SDM will set DTC B0081. |
| • | The SDM disables the I/P inflator module deployment loop. |
| • | The PPS will illuminate the PASSENGER AIR BAG OFF indicator. |
| • | The SDM requests the IPC to illuminate the AIR BAG indicator and display the message "Service Air Bag." |
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
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 Testing
Important: When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
| • | PPS wiring harness connector |
| • | SDM wiring harness connector |
- Ignition OFF, disconnect the harness connector at the SDM and the X1 harness connector at the PPS module.
- Ignition ON, test for less than 1 volt between the serial data circuit terminal 60 at the SDM harness connector and ground.
| ⇒ | If greater than the specified range, test the serial data circuit for short to voltage. |
- Test for infinite resistance between the serial data circuit terminal 60 at the SDM harness connector and ground.
| ⇒ | If not specified value, test the serial data circuit for short to ground. |
- Test for less than 2 ohms between the serial data circuit terminal 60 at the SDM harness connector and the serial data circuit terminal 5 at the X1 harness connector at the PPS module.
| ⇒ | If greater than the specified range, test the serial data circuit for an open/high resistance. |
- Replace the PPS and perform the PPS Rezeroing procedure. Refer to
Passenger Presence System Rezeroing.
- Ignition ON, verify DTC 036 is not set as current. Refer to
Passenger Presence System Flash Code Procedures.
| ⇒ | If DTC 036 is set as current replace the SDM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
