Reading and Clearing Diagnostic Trouble Codes

NOTE: To enter the ICP Self-Diagnostic Mode, the ICP must be ON and in radio tuner mode (AM/FM).

1. Enter the diagnostic mode by pressing and holding preset buttons 3 and 6 simultaneously. This will suspend all radio functions, and display SP.

ICP Self-Test Codes:

2. Preset Button 1 = Audio internal/external SELF TEST. The display will flash SELF while gathering the Diagnostic Trouble Codes (DTCs), then stop flashing when complete. Press the TUNE UP button to display the DTCs if any exist. Record codes and refer to the table.







3. Preset Button 2 = Displays the feature strap for code identification, refer to the table.

Software Identification Codes, Part 1:

Software Identification Codes, Part 2:

RCU Diagnostic Trouble Codes:

4. Preset Button 3 = ICP and RCU identification. This test identifies the software level of the ICP and RCU. The ICP is tested first, followed by the RCU. The display will have two sequences of three codes each. The first sequence is for the ICP, the second sequence is for the RCU. For code identification, refer to the table.
5. Preset Button 4 = RCU self test. This test will check the RCU Read Only Memory (ROM) and Electrically Erasable Read Only Memory (EEPROM) memory chips. For code identification, refer to the table.
6. Preset Button 5 = ICP panel display test This test will light all segments in the ICP.