B0098
DTC B0098
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B0098 01
- Passenger Air Bag Disable Switch Circuit Short to Battery
DTC B0098 02
- Passenger Air Bag Disable Switch Circuit Short to Ground
DTC B0098 04
- Passenger Air Bag Disable Switch Circuit Open
Diagnostic Fault Information
Circuit/System Description
When the ignition switch is turned to ON, the inflatable restraint sensing and diagnostic module (SDM) will perform turn-on test to diagnose critical malfunctions within inflatable restraint sensing and diagnostic module itself. The inflatable restraint sensing and diagnostic module 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 inflatable restraint sensing and diagnostic module detects a short to voltage in the passenger air bag disable switch signal circuit.
B0098 02
The inflatable restraint sensing and diagnostic module detects a short to ground in the passenger air bag disable switch signal circuit.
B0098 04
The inflatable restraint sensing and diagnostic module 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 inflatable restraint sensing and diagnostic module 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 [1][2]Air Bag Systems
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
SIR System Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
* Connector Repairs Connector Repairs
Scan Tool Reference
Control Module References 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 ohms between the ground circuit terminal 3 and ground.
• If 30 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module.
2. Test for less than 2 ohms in the passenger air bag disable switch ground circuit end to end.
• If 2 ohms or greater, replace the coil or repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module.
• If less than 30 ohms
4. Ignition ON, test for 1-3 V between the signal circuit terminal 1 and ground.
• If less than 1 V
1. Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module.
• If greater than 3 V
1. Ignition OFF.
2. Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module.
3. Ignition ON.
4. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module.
• If between 1-3 V
5. 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 in the AIR BAG ON position, test for 380-420 ohms between the signal terminal 1 and the ground terminal 3.
• If not between 380-420 ohms
Replace the S40 passenger air bag disable switch.
• If between 380-420 ohms
3. With the switch in the AIR BAG OFF position, test for 95-105 ohms, between the signal terminal 1 and the ground terminal 3.
• If not between 95-105 ohms
Replace the S40 passenger air bag disable switch.
• If between 95-105 ohms
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Control Module References Control Module References for inflatable restraint sensing and diagnostic module replacement, programming and setup