For 1990-2009 cars

### 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 B1000 46: Trouble Code Memory Full

### Circuit/System Description

This DTC indicates the memory status of the inflatable restraint sensing and diagnostic module (SDM).

### Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

### Conditions for Setting the DTC

The module has detected that the memory for recording DTCs has become full.

### Action Taken When the DTC Sets

The module refuses all additional inputs.

### Conditions for Clearing the DTC

• | A current DTC clears when the malfunction is no longer present.

• | A history DTC clears when the module ignition cycle counter reaches the reset threshold of 100, without a repeat of the malfunction.

### Circuit/System Verification

1. Ignition ON, verify that no current SDM DTCs exist.

⇒ | If any current DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.

Verify that DTC B1000 46 is not set as current.

⇒ | If DTC is set as a current, clear DTC. If DTC sets, replace the SDM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Inflatable Restraint Sensing and Diagnostic Module Replacement for SDM replacement, setup, and programming