Circuit Description
When the ignition switch is turned to the ON position, the CLAMP 15 CRUISE Fuse applies battery voltage to the AIR BAG warning lamp that is connected to the INFLATABLE RESTRAINT INDICATOR, terminal 6, of the inflatable restraint sensing and diagnostic and seat belt pretensioner module (SDM). The ignition switch applies battery voltage to the IGNITION input, terminal 5, of the SDM. The SDM responds by flashing the AIR BAG Warning Lamp seven times and then turning it OFF. The SDM monitors the lamp output driver by comparing the output state at the INFLATABLE RESTRAINT INDICATOR, terminal 6, to the microprocessor commanded state.
Conditions for Setting the DTC
DTC 43 will set when:
| • | The specified value for the output state at the INFLATABLE RESTRAINT INDICATOR, terminal 6, does not match the commanded state for 1.25 seconds. |
| • | The voltage measured at terminal 6 is above a specified value. |
This test runs during the Initialization and Continuous Monitoring when the ignition voltage is above a specified value.
Action Taken When the DTC Sets
| • | The SDM sets a DTC 43. |
| • | The SDM attempts to turn ON the AIR BAG warning lamp. |
Conditions for Clearing the DTC
Current and History DTC codes must be cleared using a scan tool Clear DTC Information command. If the circuit fault has been successfully repaired and the conditions which caused the DTC to set are no longer existing, the DTC may be cleared using the scan tool. If the output state at the INFLATABLE RESTRAINT INDICATOR, terminal 6, matches the microprocessor commanded state, the current DTC 43 will change to a history DTC 43, which may be cleared using the scan tool.
Diagnostic Aids
These malfunctions are addressed in the SIR Diagnostic System Check. Perform the SIR Diagnostic System Check before continuing with this table.
Test Description
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This step checks terminal 13 and terminal 19 of the instrument cluster wiring harness connector for corrosion or damaged terminals.
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This step checks terminal 13 and terminal 19 of the instrument cluster for corrosion or damaged terminals.
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This step checks to see if the AIR BAG warning lamp is OK.
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This step checks the AIR BAG warning lamp socket within the instrument cluster for corrosion or damaged terminals.
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This step checks for a short between terminal 13 and terminal 19 of the instrument cluster wiring harness connector.
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This step checks for a short between terminal 13 and terminal 19 of the instrument cluster.
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This step checks the SDM wiring harness connector for corrosion or damaged terminals.
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This step determines if there is a short to B+ in CKT XB20 or if there is a malfunctioning SDM.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
Is terminal 13 or terminal 19 of the instrument cluster wiring harness connector corroded or damaged? | -- | |||
3 | Repair terminal 13 or terminal 19 of the instrument cluster wiring harness connector. Refer to Connector Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
Inspect terminal 13 and terminal 19 of the instrument cluster for corrosion or damaged terminals. Is terminal 13 or terminal 19 of the instrument cluster corroded or damaged? | -- | |||
5 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | -- | |
Is the AIR BAG warning lamp OK? | -- | |||
7 | Replace the AIR BAG warning lamp. Is the repair complete? | -- | -- | |
Inspect the AIR BAG warning lamp socket within the instrument cluster for corrosion or damaged terminals. Is the AIR BAG warning lamp socket corroded or damaged? | -- | |||
Use the J 39200 Digital Multimeter (DMM) to measure the resistance between terminal 13 and terminal 19 of the instrument cluster wiring harness connector. Is the measured resistance less than the specified value? | OL | |||
10 |
Is the repair complete? | -- | -- | |
Use the J 39200 Digital Multimeter (DMM) to measure the resistance between terminal 13 and terminal 19 of the instrument cluster. Is the measured resistance less than the specified value? | OL | |||
Is terminal 6 of the SDM wiring harness connector corroded or damaged? | -- | |||
13 | Use the J 42250 Catera Terminal Repair Kit to repair the SDM wiring harness connector. Is the repair complete? | -- | -- | |
14 | Inspect terminal 6 of the SDM for damaged terminals or corrosion. Is terminal 6 of the SDM corroded or damaged? | -- | ||
15 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module Replacement . Is the repair complete? | -- | -- | |
Is the measured voltage more than the specified value? | 1 V | |||
17 |
Is the repair complete? | -- | -- | |
18 | Reconnect all the SIR components, making sure all the components are properly mounted? Have all SIR components been reconnected and properly mounted? | -- | -- | |
19 | Use the scan tool to clear all current and history SIR DTCs. Have all current and history SIR DTCs been cleared? | -- | -- |
