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DTC B0098

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B0098 01: Passenger Air Bag Disable Switch Circuit Short Circuit to Battery

DTC B0098 02: Passenger Air Bag Disable Switch Circuit Short Circuit to Ground

DTC B0098 04: Passenger Air Bag Disable Switch Circuit Open

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Passenger Air Bag Disable Switch Signal

B0098 02

B0098 04

B0098 01

-

Passenger Air Bag Disable Switch Ground

-

B0098 04

B0098 04

--

Circuit/System Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself. The SDM continuously checks the disable switch position switch and circuit defect by letting the regular voltage flow through the disable switch circuit and verifying the current.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B0098 01

The SDM detects a short to voltage in the passenger air bag disable switch signal circuit.

B0098 02

The SDM detects a short to ground in the passenger air bag disable switch signal circuit.

B0098 04

The SDM detects an open/high resistance in the passenger air bag disable switch signal circuit or the passenger air bag disable switch ground circuit.

Action Taken When the DTC Sets

The SDM will ignore the signal from the passenger air bag disable switch and will continuously enable the passenger air bag.

Conditions for Clearing the DTC
    • The DTC will be current for as long as the fault is present.
    • When the fault is no longer present, the DTC will be a history DTC.
    • A history DTC will clear after 50 ignition cycles.

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

    •  Circuit Testing
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  Connector Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Observe the scan tool Passenger Air Bag Disabled Switch parameter while commanding the passenger air bag ON and OFF by using the S40 passenger air bag disable switch. The value should change between On and Off

Circuit/System Testing
  1. Ignition OFF.
  2. Disconnect the harness connector at the S40 passenger air bag disable switch.
  3. Test for less than 30 Ω between the ground circuit terminal 3 and ground.
    4. [ARW-LISTFAIL]

  4. If 30 Ω or greater

    5. [/ARW-LISTFAIL]
    3.1. Ignition OFF, disconnect the harness connector at the K36 SDM.
    3.2. Test for less than 2 Ω in the passenger air bag disable switch ground circuit end to end.
    [ARW-LISTFAIL]

  5. If 2 Ω or greater, replace the coil or repair the open/high resistance in the circuit.

  6. If less than 2 Ω, replace the K36 SDM.

    7. [/ARW-LISTFAIL] [ARW-LISTPASS]

  7. If less than 30 Ω

    8. [/ARW-LISTPASS]
  8. Ignition ON, test for 4.75-5.25 V between the signal circuit terminal 1 and ground.
    9. [ARW-LISTFAIL]

  9. If less than 4.75 V

    10. [/ARW-LISTFAIL]
    4.1. Disconnect the harness connector at the K36 SDM.
    4.2. Test for infinite resistance between the signal circuit and ground.
    [ARW-LISTFAIL]

  10. If less than infinite resistance, repair the short to ground on the circuit.

    11. [/ARW-LISTFAIL]
    4.3. Test for less than 2 Ω in the signal circuit end to end.
    [ARW-LISTFAIL]

  11. If 2 Ω or greater, repair the open/high resistance in the circuit.

  12. If less than 2 Ω, replace the K36 SDM.

    13. [/ARW-LISTFAIL] [ARW-LISTFAIL]

  13. If greater than 5.25 V

    14. [/ARW-LISTFAIL]
    4.1. Ignition OFF.
    4.2. Disconnect the harness connector at the K36 SDM.
    4.3. Ignition ON.
    4.4. Test for less than 1 V between the signal circuit and ground.
    [ARW-LISTFAIL]

  14. If 1 V or greater, repair the short to voltage on the circuit.

  15. If less than 1 V, replace the K36 SDM.

    16. [/ARW-LISTFAIL] [ARW-LISTPASS]

  16. If between 4.75-5.25 V

    17. [/ARW-LISTPASS]
  17. Replace the S40 passenger air bag disable switch.

Component Testing
  1. Disconnect the harness connector at the S40 passenger air bag disable switch.
  2. With the switch open, test for 380-420 Ω between the signal terminal 1 and the ground terminal 3.
    3. [ARW-LISTFAIL]

  3. If not between 380-420 Ω

    Replace the S40 passenger air bag disable switch.

    4. [/ARW-LISTFAIL][ARW-LISTPASS]

  4. If between 380-420 Ω

    5. [/ARW-LISTPASS]
  5. With the switch closed, test for 95-105 Ω, between the signal terminal 1 and the ground terminal 3.
    6. [ARW-LISTFAIL]

  6. If not between 95-105 Ω

    Replace the S40 passenger air bag disable switch.

    7. [/ARW-LISTFAIL][ARW-LISTPASS]

  7. If between 95-105 Ω

    8. [/ARW-LISTPASS]
  8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

    •  Inflatable Restraint Instrument Panel Compartment Module Disable Switch Replacement
    • Control Module References for SDM replacement, programming and setup
   


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