Radio, Stereo, and Compact Disc: Testing and Inspection
Trouble DiagnosesSPEAKER WALK-AROUND TEST
NOTE: The audio unit must be turned on and in radio tuner mode (AM/FM) in order to enter the speaker walk-around test.
1. To enter the speaker walk-around test, simultaneously press station select buttons 3 and 6.
2. The speaker walk-around test stops and applies sound to each speaker for about 2 seconds. Each speaker is tested and displayed on the audio unit display in the following sequence: RF, LF, LR, and RR.
3. If the vehicle is equipped with dual media audio unit, the speaker walk-around test automatically continues and tests antenna and subwoofer (if equipped). If a speaker short exists, "SPKR SHORT" will be displayed. If the vehicle is not equipped with a CD changer or if the CD changer is not responding, "NO CDDJ" will be displayed
AUDIO UNIT SELF-TEST MATRIX
NOTE: The audio unit must be turned on and in radio tuner mode (AM/FM) in order to enter the audio unit self-test mode.
Document the diagnostic trouble codes (DTC's) and perform the self-test again.
1. To enter each of the following tests, press and release the station select button while in the speaker walk- around test.
2. To exit the self-test mode, turn the ignition switch or the audio unit off.
3. If the concern remains and the fault is not detected, proceed to the "SYMPTOM CHART".
DUAL MEDIA AUDIO UNIT DTC INDEX
AM/FM/CASSETTE AUDIO UNIT DTC INDEX
SYMPTOM CHART
SPEAKER INSPECTION
1. Disconnect speaker harness connector.
2. Measure the resistance between speaker terminals 1 and 2.
- The resistance should be 2 - 4 Ohms.
3. Using jumper wires, momentarily connect a 9V battery between speaker terminals 1 and 2.
- A momentary hum or pop should be heard.
ANTENNA INSPECTION
1. Using a jumper wire, clip an auxiliary ground between antenna and body.
- If reception improves, check antenna ground (at body surface)
- If reception does not improve, check main feeder cable for short circuit or open circuit.
STEERING WHEEL AUDIO CONTROL SWITCHES INSPECTION
1. Disconnect audio unit M44.
2. Measure the resistance between audio unit M44 and ground while pressing each button.
3. Resistances should be within specifications.
AUDIO UNIT, C/D CHANGER, REAR AUDIO REMOTE CONTROL UNIT AND SUBWOOFER
AMPLIFIER INSPECTION
All voltage inspections are made with
- Ignition switch ON or ACC
- Audio unit ON
- Audio unit, CD changer, rear audio remote control unit and subwoofer amplifier connected. (If the base audio unit is removed from the audio unit mounting bracket to make the inspection, supply a ground to the case using a jumper wire
AUDIO UNIT VOLTAGES
REAR AUDIO REMOTE CONTROL UNIT VOLTAGES
C/D CHANGER VOLTAGES
SUBWOOFER AMPLIFIER VOLTAGES