F 150 2WD V8-5.4L Flex Fuel (2008)
Speaker: Testing and Inspection
Audio Control Module (ACM) Self-Diagnostic Test
Without Navigation
AUDIO CONTROL MODULE (ACM) SELF-DIAGNOSTIC TEST - WITHOUT NAVIGATION
NOTE: This self-diagnostic test disables the rear entertainment module (RETM) buttons. Turning the ignition switch off and back on may not re-enable
the RETM buttons. To re-enable the RETM buttons, turn the audio system off and back on. The headphone symbol lights up on the ACM display to
indicate the RETM buttons are re-enabled.
1. To enter the following tests, press the desired preset button while in the speaker walk-around test or while in the ACM self-diagnostic test.
2. To exit the ACM self-diagnostic test, turn the ignition switch or the audio system off.
3. The self-diagnostic test has 7 manual tests available:
-
Preset button 1 = Audio internal/external tests. This test verifies the communication to devices internal and external to the audio system. While
the tests are carried out, the display flashes SELF TEST. When the tests are completed, the display stops flashing and shows either SELF
PASS or SELF FAIL. Failures can be viewed by pressing the tune up button to start the scroll through the list of faults. Each fault is displayed
for 2 seconds. After the last fault is displayed, SELF FAIL is returned to the display.
Internal/external self-test can be exited anytime by entering another diagnostic test.
-
Preset button 2 = VIEW/CLEAR DTCS. This test displays and allows the DTCs to be cleared. If no DTCs are found, the display shows NO
DTCS. If any DTCs are present, the display shows DTCS FOUND and can be viewed by pressing the tune up button to start scrolling through
the list of faults.
To clear all DTCs, press the EJECT key. The display shows DTCS CLEAR.
-
Preset button 3 = SIGNAL STRENGTH TEST. This test displays the average signal strength of the currently tuned frequency.
-
Preset button 4 = Software version information. This test queries each radio system controller for its software version information. The
software levels can be viewed by pressing the tune up button to start scrolling the various microcontrollers. After the last software level is
displayed, the SOFT LEVELS message is returned to the display.
-
Preset button 5 = DISPLAY TEST. This test lights all the display segments for 5 seconds and then turns all segments off.
-
Preset button 6 = MODULE CONFIGURATION. This tests the ACM configuration. The configuration can be viewed by pressing the tune up
button.
-
CD button = CDX6 diagnostic mode. This test displays the last modes and errors that are saved in the memory. While these tests are being
carried out, the ACM displays CD DIAG. The modes and errors can be viewed by pressing the tune up button.
4. To exit the self-diagnostic test, turn the key to OFF or turn the audio system off.
5. If the concern remains and the fault is not detected, GO to Symptom Chart. See: Testing and Inspection/Symptom Related Diagnostic Procedures
With Navigation
AUDIO CONTROL MODULE (ACM) SELF-DIAGNOSTIC TEST - WITH NAVIGATION
The navigation system provides internal self diagnostics to assist with diagnosing vehicle concerns.
Press and hold preset buttons 4 and 6 for 3 seconds.
Press the "End Test" button on the screen to exit the speaker walk test.
The following diagnostics are available using the on-screen buttons as follows:
