DTC B1009 RHD

The electrically erasable programmable read-only memory (EEPROM) check sum error detection is handled inside the Audio/Video Interface Module. No external circuits are involved.

The Audio/Video Interface Module runs the program to detect an EEPROM checksum error after each wake-up. The only requirements are battery positive voltage and ground. This program runs even if the voltage is out of the valid operating range.

The Audio/Video Interface Module retains an inverse copy of the digital value stored in certain blocks of memory in the EEPROM. The Audio/Video Interface Module then reads the information from those certain blocks and adds the stored inverse value to the current value. If they do not equal 0, the module sets the DTC.

The Audio/Video Interface Module reverts to base operation values programmed for those blocks of data that have failed the check sum test. The blocks of data that have not failed the check sum test are not affected.

This DTC may be stored as a history DTC without affecting the operation of the Audio/Video Interface Module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the Audio/Video Interface Module.

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

Scan Tool Reference

Control Module References for scan tool information

1. Verify DTC B1009 36 is not set.

⇒	If the DTC is set, replace the Audio/Video Interface Module.

Perform the Diagnostic Repair Verification.

Audio/Video Interface Module Replacement