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 B101E 42: ECU Software Performance Calibration Data Set Not Programmed

### Circuit/System Description

When the ignition is turned ON, the radio performs a self test to verify if any critical malfunction exists within the system. Once the power-up is completed, the radio establishes communications with the body control module (BCM). During the power-up mode the radio checks for a valid calibration data set. If no valid calibration set is found the radio disables the system.

### Conditions for Running the DTC

• | Ignition is in ON or ACCY

• | The system voltage is at least 9.5 volts and no more than 15.5 volts.

• | All the above conditions are present for greater than 10 seconds.

### Conditions for Setting the DTC

The calibration data set is not programmed in the radio.

### Action Taken When the DTC Sets

Radio functions are disabled

### Conditions for Clearing the DTC

• | A current DTC clears when the conditions for setting the DTC are no longer present.

• | A history DTC clears after 50 malfunction-free ignition cycles.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Radio/Audio System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Verify that DTC B101E is not set.

⇒ | If the DTC is set, perform the Radio Programming and Setup procedure. If the DTC resets, replace the radio.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for radio replacement, setup, and programming