B1530

DTC B1530

CIRCUIT DESCRIPTION
When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within the passenger presence system (PPS). When the SDM has completed the power-up mode, the SDM will establish communication with the PPS. The SDM will increase a fault counter with each ignition cycle that a fault exists with the PPS. The SDM will lock out the PPS after a predetermined ignition cycle count maximum has been reached. For more detailed information concerning class 2 serial data lines, refer to Data Link Communications Description and Operation.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1530 Discard Passenger Presence System 1

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

CONDITIONS FOR SETTING THE DTC
- The PPS has a current fault.
- The PPS fault counter in the SDM has reached 127 counts.

ACTION TAKEN WHEN THE DTC SETS
- The SDM disables the instrument panel (I/P) module deployment loop.
- The SDM commands the AIR BAG indicator ON via class 2 serial data.
- The SDM will lock out the malfunctioning PPS.

CONDITIONS FOR CLEARING THE DTC
- The PPS has been replaced.
- The SDM has been replaced.

DIAGNOSTIC AIDS

IMPORTANT: DTC B0092 or DTC B0098 will set if the PPS has a malfunction, and has set any one of the following DTCs: 023, 024, 063, 064, or 065. When DTC B0092 or DTC B0098 is present, it is important to check the PPS for any current DTC. Refer to Passenger Presence System Flash Code Procedures. If the PPS has any current DTCs, address those DTCs before performing this DTC chart. Component Tests and General Diagnostics

Any repair performed on the original PPS will not clear DTC B1530.

TEST DESCRIPTION

Step 1 - Step 5:

The numbers below refer to the step numbers on the diagnostic table.
2. This step checks for any current PPS DTCs.
3. This step checks for the presence of DTC B1530.
4. This step replaces the SDM.
5. This step performs the SDM setup procedure.