Reading and Clearing Diagnostic Trouble Codes

NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the audio unit must be turned on and in radio tuner mode (AM/FM).

Audio unit self-diagnostic mode can only be entered while in the speaker walk-around test.
1. To enter the speaker walk-around test, press the audio unit preset buttons 3 and 6 simultaneously.
2. The speaker walk-around test stops at each speaker and applies a tone to each speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio unit in the following sequence: SPEAKER RF, SPEAKER LF, SPEAKER LR, SPEAKER RR, SUBWOOFER I (for subwoofer, if equipped), and SUBWOOFER II (for center imaging speakers, if equipped). This test can isolate an open circuit for each speaker (broken wire or disconnect). However, a short circuit can only be isolated to either the right pair or left pair.
3. The speaker walk-around test automatically continues and tests:
^ for a speaker circuit short. If a short is present, SPKR SHORT will be displayed. Speaker circuit shorts are detected only in the RF, LF, LR, and RR speaker circuitry.
^ for the CD/DJ. The audio unit display will show NO DJ if not present. The speaker walk-around test will end and the audio unit will return to its previous setting.
4. Audio unit self-diagnostic mode has six tests available:
^ Preset button 1 = Audio internal/external SELF TEST. If SELF FAIL is displayed, press TUNE > to scroll view the DTCs stored. Refer to the Audio Unit Diagnostic Trouble Codes (DTC) Index. If the system is OK, SELF PASS is displayed. Audio Unit Diagnostic Trouble Code (DTC) Index
^ Preset button 2 = View/Clear continuous diagnostic trouble codes (DTCs). NO DTCS is displayed if no DTCs are retrieved. If DTCs FOUND is displayed, press TUNE> button to view the DTCs retrieved. Refer to the Audio Unit Diagnostic Trouble Codes (DTC) Index. To clear all DTCs, press the EJECT button. DTCS CLEAR will be displayed. Audio Unit Diagnostic Trouble Code (DTC) Index
^ Preset button 3 = SIGNAL TEST. This test measures the average strength at the current tuner setting.







^ Preset button 4 = Software configuration level. This test queries each radio system controller for the software configuration level. SOFT LEVELS will be displayed upon completion of the query. Press TUNE > to scroll view the software configuration version level.
^ Preset button 5 = DISPLAY TEST. This test will light all the audio unit display segments for five seconds, then turn all segments off. When the test is complete, DISPLAY TEST is displayed on the bezel.
^ Preset button 6 = Configuration/EQ ID. This test queries the audio system controller for the software configuration and EQ ID.
5. To enter these tests, press the preset button desired while in the speaker walk-around test. This will abort the speaker walk-around test and start the selected test.
6. To exit audio unit self-diagnostic mode, turn the ignition switch or the audio unit off.
7. If the concern remains and the fault is not detected, proceed to the Diagnostic Tool to continue diagnostics. Scan Tool Testing and Procedures