Orlando

Seat Belt Indicator Circuit Malfunction - Passenger

When an individual is sitting in the passenger seat the passenger presence sensor detects the individual. A signal to the inflatable restraint sensing and diagnostic module (SDM) indicates a person is in the passenger seat. The SDM will turn the passenger seat belt indicator. The passenger seat belt switch is a 2-wire switch wired to the SDM using a signal circuit and a low reference circuit. When the seat belt is unbuckled the switch is closed, and when the seat belt is buckled the switch is open. The SDM sends the status of the passenger seat belt via a hard wire to the passenger air bag disable indicator. After receiving the message, the passenger air bag disable indicator controls the illumination of the passenger seat belt indicator.

Schematic Reference

Seat Belt Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Seat Belt System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, have someone sit in the passenger seat. With a scan tool verify the Automatic Occupant Sensing Current Front Occupancy Status indicates Occupied.

⇒	If the scan tool does not indicate Occupied, test the passenger presence sensor signal circuit and the low reference circuit for an open or short. If the circuits test normal, replace the passenger presence sensor. Refer to Front Seat Cushion Cover and Pad Replacement .

2. Ignition ON, with a scan tool perform the Passenger Seat Belt Reminder Indicator On/Off Control Function and verify the passenger seat belt indicator turns on and off.

⇒	If the indicator is always ON or always OFF, refer to Seat Belt Indicator Malfunction.

3. With the scan tool monitor the Passenger Seat Belt Status parameter while buckling and unbuckling the seat belt. The parameter should display Buckled and Unbuckled when buckling and unbuckling the seat belt.

⇒	If the values do not change, refer to Seat Belt Switch Malfunction.

Seat Belt Switch Malfunction

Note: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

•	Seat belt switch

•	Seat belt switch harness connector

•	Inflatable Restraint Sensing and Diagnostic Module

•	SDM harness connector

1. Ignition OFF, disconnect the wiring harness plug at the B88P Seat Belt Switch - Passenger.
2. Ignition OFF, test for less than 1 Ω between the low reference circuit terminal 2 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

3. Ignition ON, verify the scan tool Passenger Seat Belt Status parameter displays Buckled.

⇒	If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Passenger Seat Belt Status parameter displays Unbuckled.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

5. If all circuits test normal, replace the B88P Seat Belt Switch - Passenger.

Seat Belt Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the P14 Passenger Air Bag Disable Indicator.
2. Test for less than 1 Ω between the ground circuit terminal 4 and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal 6 and ground.
4. Ignition ON, command the Passenger Seat Belt Reminder Indicator ON and OFF with a scan tool, the test lamp should turn ON and OFF while changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

5. If all circuits test normal, test or replace the P14 Passenger Air Bag Disable Indicator.

Static Test

1. Ignition OFF, disconnect the wiring harness plug at the B88P Seat Belt Switch - Passenger.
2. Test for infinite resistance between the signal circuit terminal 1 and the low reference terminal 2, at the switch, with the switch in the open position.

⇒	If less than the specified value, replace the B88P Seat Belt Switch - Passenger.

3. Test for less than 1 Ω between the signal circuit terminal 1 and the low reference terminal 2, at the switch, with the switch in the closed position.

⇒	If greater than the specified range, replace the B88P Seat Belt Switch - Passenger.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.