| Diagnosis and Testing Refer to Wiring Diagrams Section 415-01, for schematic and connector information.Refer to Wiring Diagrams Section 415-03, for schematic and connector information.Refer to Wiring Diagrams Section 415-07, for schematic and connector information. Inspection and Verification NOTE:If the code is entered incorrectly 3 times, the system will lock out. The component can only be unlocked by the manufacturer. - Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart | Mechanical | Electrical | - Audio unit
- Cassette player
- Compact disc (CD) player
- Digital Versatile Disc (DVD) Player
- Antenna mast or base
| - Fuse(s)
- Wiring harness
- Electrical connector(s)
- Speaker(s)
- Audio unit
- Cassette player
- CD player
- DVD Player
- Antenna cable
- Audio control switch (if equipped)
- Central junction box (CJB)
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If an obvious cause is not found, codes may be shown in the audio unit display. Check the audio unit display for the following Error Codes:
- for vehicles with 6006E or 9006 audio unit refer to the CD Error Codes - vehicles with Vehicles with 6006E or 9006 Audio Unit
- for vehicles with 4500 audio unit refer to the CD Error Codes - vehicles with 4500 Audio Unit
- If no error codes are displayed on the audio unit refer to the Self-Diagnostic Mode.
CD Error Codes Vehicles with 6006E Audio Unit Error Codes | Error Code | Error Description | Error Rectification | | E1 | Communications Error | Install a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E2 | Overtemp Error | The Audio unit is too hot, it will not work until it has cooled down. Check the heater duct(s) are not bleeding hot air on to the audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
If the concern persists, INSTALL a new audio unit. TEST the system for normal operation. | | E3 | Mechanical Error | PRESS and HOLD the LOAD and EJECT buttons simultaneously. WAIT until the audio unit has checked through the CDs currently in the unit. TEST the system for normal operation. If the concern persists, DISCONNECT the audio unit power connector. WAIT 20 seconds and then CONNECT the audio unit power connector. WAIT until the audio unit has checked through the CDs currently in the unit. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E4 | Focus Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed, INSERT a different CD. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E5 | Overcurrent Error | Install a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | CD Error Codes - vehicles with 4500 Audio Unit Error Codes | Error Code | Error Description | Error Rectification | | E-2B | CD Read Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-2C | Jump Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-2D | HF Detector Error | DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. WAIT until the audio unit has checked through the CDs currently in the unit. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-2E | CD Decoder Hardware Error | DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. WAIT until the audio unit has checked through the CDs currently in the unit. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-8x | Load/Eject Error | DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. WAIT until the audio unit has checked through the CDs currently in the unit. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-23 | Sledge Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-24 | Focus Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-25 | Spindle Motor Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-26 | Radial Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-27 | PLL Lock Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-28 | Subcode Timeout Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E-29 | Subcode Not Found Error | CD is upside down or dirty. Clean the CD and try it again, if the error code is still displayed. DISCONNECT the audio unit power connector. WAIT 30 seconds and then CONNECT the audio unit power connector. If the error code is still displayed. INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | Self-Diagnostic Mode - To enter the audio unit Self-Diagnostic Mode, switch the audio unit ON. Press the preset buttons 3 and 6 together for at least 2 seconds.
- Release the preset buttons 3 and 6 and the audio unit will enter the Self-Diagnostic Mode. On entering the Self-Diagnostic Mode, the audio unit will automatically search the FM band to carry out the waveband check, starting at the lowest frequency until it finds a signal.
- To exit the audio unit Self-Diagnostic Mode, press the preset button 6.
Self-Diagnostic Mode - Model 2500 | Test | Syntax Displayed | Description | | 1. FM waveband check. | Numeric value (of station found) or Er2 if no signal received. | Tests the signal from the antenna cable. | | 2. Volume. | No display shown. Audio unit volume preset at 15. | Tests the traffic announcement preset volume and volume control. | | 3. Test speaker circuit. | RF. | Tests the right-hand front speaker circuit. | | 4. Test speaker circuit. | LF. | Tests the left-hand front speaker circuit. | | End of the audio unit Self-Diagnostic Mode. | END. | Displayed until the audio unit preset button 6 is pressed or Self-Diagnostic Mode times out. | Self-Diagnostic Mode - Models 3500, 4500 and 6006 | Test | Syntax Displayed | Description | | 1. FM waveband check. | Numeric value (of station found) or NOT FOUND if no signal received. | Tests the signal from the antenna cable. | | 2. Volume. | No display shown. Audio unit volume preset at 15. | Tests the traffic announcement preset volume and volume control. | | 3. Test speaker circuit. | 4CH RF for four channel system 2CH RF for two channel system. | Tests the right-hand front speaker circuit. | | 4. Test speaker circuit. | 4CH LF for four channel system 2CH LF for two channel system. | Tests the left-hand front speaker circuit. | | 5. Test speaker circuit. | 4CH RR. | Tests the right-hand rear speaker circuit. | | 6. Test speaker circuit. | 4CH LR. | Test the left-hand rear speaker circuit. | | 7. Test compact disc auto-changer circuit (if equipped). | - CDDJ OK if communications are achieved.
- NO CDDJ if no communications are achieved.
| Tests the compact disc auto-changer circuit. | | End of the audio unit Self-Diagnostic Mode. | END. | Displayed until the audio unit preset button 6 is pressed or Self-Diagnostic Mode times out. | - If the concern is still evident after the self-diagnostic mode, refer to the Symptom Chart.
Symptom Chart | Symptom | Possible Sources | Action | | The audio unit is inoperative/does not operate correctly | * Fuse(s). * Circuit(s). * Audio unit. | * | | The display is blank - radio and cassette player or CD player operate | * Audio unit. | * INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | Poor reception | * Antenna. * Antenna cable. * Audio unit. | * | | Poor quality/distorted sound from one or more speakers (not all speakers) | * Speaker(s). * Circuit(s). * Audio unit. | * | | No sound from all speakers | * Audio unit. * Circuit(s). * Speaker(s). | * | | The CD player is inoperative/does not operate correctly | * Audio unit. | * INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | No sound from one or more of the speakers (not all speakers) | * Circuit(s). * Speaker(s). * Audio unit. | * | | The audio remote control is inoperative/does not operate correctly | * Circuit(s). * Audio remote control. * Audio unit. | * | | The digital versatile disc (DVD) player is inoperative/does not operate correctly | * DVD player * Circuit(s) * Fuse(s) | * | Pinpoint Tests NOTE:Use a digital multimeter for all electrical measurements. | PINPOINT TEST A : THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK AUDIO UNIT FOR POWER | | | 1 Disconnect Audio Unit C344. | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between the audio unit C344 pin 1, circuit 29-MD15 (OG/BK), harness side and ground; and between the audio unit C344 pin 2, circuit 75-MD15 (YE/GN), harness side and ground. | | | Are the voltages greater than 10 volts? Yes No REPAIR circuit 29-MD15 (OG/BK) or circuit 75-MD15 (YE/GN). TEST the system for normal operation. | | A2: CHECK AUDIO UNIT FOR GROUND | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the audio unit C344 pin 13, circuit 91-MD15 (BK/GN), harness side and ground; and between the audio unit C344 pin 17, circuit 91-MD34 (BK/YE), harness side and ground; and between the audio unit C344 pin 24, circuit 91-MD15A (BK/GN), harness and ground. | | | Are the resistances less than 1 ohm? Yes INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR circuit 91-MD15 (BK/GN) or 91-MD34 (BK/YE) or 91-MD15A (BK/GN). TEST the system for normal operation. | | PINPOINT TEST B : POOR RECEPTION | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK THE ANTENNA CABLE SHIELD | | | 1 Ignition switch in position 0. | | | 2 Disconnect Audio Unit Antenna Connector. | | | 3 Measure the resistance between the antenna cable ground connector (shield) and ground. | | | Is the resistance less than 1 ohm? Yes No CLEAN and TIGHTEN the antenna mast base connection to the body. If the concern persists, INSTALL a new antenna cable.
REFER to: Antenna Cable (415-02 Antenna, Removal and Installation).
TEST the system for normal operation. | | B2: CHECK THE ANTENNA CENTER CONDUCTOR FOR OPEN | | | 1 Remove the antenna mast. | | | 2 Measure the resistance of the center conductor, between the ends of the antenna cable. | | | Is the resistance less than 1 ohm? Yes No INSTALL a new antenna cable.
REFER to: Antenna Cable (415-02 Antenna, Removal and Installation).
TEST the system for normal operation. | | B3: CHECK ANTENNA CABLE FOR SHORT | | | 1 Measure the resistance between the antenna center conductor and the antenna ground (shield). | | | Is the resistance greater than 10,000 ohms (open circuit)? Yes CLEAN and TIGHTEN the ground connections at the base of the antenna and battery ground cable to body. If the concern persists, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No INSTALL a new antenna cable.
REFER to: Antenna Cable (415-02 Antenna, Removal and Installation).
TEST the system for normal operation. | | PINPOINT TEST C : POOR QUALITY/DISTORTED SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK THE SPEAKER RESISTANCE | | | 1 Disconnect Inoperative Speaker. | | | 2 Measure the resistance between the inoperative speaker pin 1 and pin 2, component side. | | | Is the resistance approximately 4 ohms? Yes No INSTALL a new speaker. TEST the system for normal operation. | | C2: CHECK SPEAKER INPUT FOR SHORT TO GROUND | | | 1 Disconnect Audio Unit C344. | | | 2 Measure the resistance between the inoperative speaker connector pin 1, harness side and ground. | | | Is the resistance greater than 10,000 ohms (open circuit)? Yes No REPAIR the inoperative speaker input circuit. TEST the system for normal operation. | | C3: CHECK SPEAKER RETURN FOR SHORT TO GROUND | | | 1 Measure the resistance between the inoperative speaker connector pin 2, harness side and ground. | | | Is the resistance greater than 10,000 ohms (open circuit)? Yes No REPAIR the inoperative speaker input circuit. TEST the system for normal operation. | | C4: CHECK SPEAKER CIRCUIT FOR SHORT | | | 1 Measure the resistance between the inoperative speaker connector pin 1, harness side and pin 2, harness side. | | | Is the resistance greater than 10,000 ohms (open circuit)? Yes INSTALL a new speaker. TEST the system for normal operation. If the concern persists, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR the circuit(s). TEST the system for normal operation. | | PINPOINT TEST D : NO SOUND FROM ALL SPEAKERS | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK SPEAKER INPUT CIRCUIT FOR SHORT TO GROUND | | | 1 Ignition switch in position 0. | | | 2 Disconnect Audio Unit C344. | | | 3 Measure the resistance between the following audio unit connector pins and ground: - (Front left speaker) C344 pin 8, circuit 8-MD10 (WH/BK), harness side and ground.
- (Rear left speaker) C344 pin 9, circuit 8-MD11 (WH/VT), harness side and ground.
- (Front right speaker) C344 pin 11, circuit 8-MD17 (WH/RD), harness side and ground.
- (Rear right speaker) C344 pin 10, circuit 8-MD18 (WH), harness side and ground.
| | | Are the resistances greater than 10,000 ohms (open circuit)? Yes No REPAIR the circuit(s). TEST the system for normal operation. | | D2: CHECK SPEAKER RETURN CIRCUIT FOR SHORT TO GROUND | | | 1 Measure the resistance between the following audio connector pins and ground. - (Front left speaker) C344 pin 21, circuit 10-MD10 (GY/BK), harness side and ground.
- (Rear left speaker) C344 pin 22, circuit 10-MD11 (GY/VT), harness side and ground.
- (Front right speaker) C344 pin 12, circuit 10-MD17 (GY/RD), harness side and ground.
- (Rear right speaker) C344 pin 23, circuit 10-MD18 (GY), harness side and ground.
| | | Are the resistances greater than 10,000 ohms (open circuit)? Yes INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR the circuit(s). TEST the system for normal operation. | | PINPOINT TEST E : NO SOUND FROM ONE OR MORE OF THE SPEAKERS | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | E1: CHECK THE SPEAKER RESISTANCE | | | 1 Disconnect Inoperative Speaker. | | | 2 Measure the resistance between the inoperative speaker pin 1 and pin 2, component side. | | | Is the resistance approximately 4 ohms? Yes No INSTALL a new speaker(s). TEST the system for normal operation. | | E2: CHECK SPEAKER CIRCUIT RESISTANCE | | | 1 Disconnect Audio Unit C344. | | | 2 Measure the resistance between the audio unit C344 and the inoperative speaker(s) connector pins. - (Front left speaker) C344 pin 8, circuit 8-MD10 (WH/BK), harness side and C527 pin 1, circuit 8-MD28 (WH), harness side.
- (Front left speaker) C344 pin 21, circuit 10-MD10 (GY/BK), harness side and C527 pin 2, circuit 10-MD28 (GY), harness side.
- (Front right speaker) C344 pin 11, circuit 8-MD17 (WH/RD), harness side and C528 pin 1, circuit 8-MD28 (WH), harness side.
- (Front right speaker) C344 pin 12, circuit 10-MD17 (GY/RD), harness side and C528 pin 2, circuit 10-MD28 (GY), harness side.
- (Rear left speaker) C344 pin 9, circuit 8-MD11 (WH/VT), harness side and C533 pin 1, circuit 8-MD29 (WH/VT), harness side.
- (Rear left speaker) C344 pin 22, circuit 10-MD11 (GY/VT), harness side and C533 pin 2, circuit 10-MD29 (GY/WH), harness side.
- (Rear right speaker) C344 pin 10, circuit 8-MD18 (WH), harness side and C534 pin 1, circuit 8-MD29 (WH/VT), harness side.
- (Rear right speaker) C344 pin 23, circuit 10-MD18 (GY), harness side and C534 pin 2, circuit 10-MD29 (GY/WH), harness side.
| | | Is the resistance less than 1 ohm? Yes INSTALL a new speaker. TEST the system for normal operation. If the concern persists, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
Test the system for normal operation. No REPAIR the relevant circuit. TEST the system for normal operation. | | PINPOINT TEST F : THE AUDIO REMOTE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | F1: CHECK THE CIRCUIT 8-MD26 FOR OPEN | | | 1 Disconnect Audio Unit C344. | | | 2 Disconnect Audio Remote Control C681. | | | 3 Measure the resistance between the audio unit C344 pin 18, circuit 8-MD26 (WH/BK), harness side and the audio remote control C681 pin 1, circuit 8-MD26 (WH/BK), harness side. | | | Is the resistance less than 1 ohm? Yes No REPAIR the circuit. TEST the system for normal operation. | | F2: CHECK CIRCUIT 9-MD26 (BN/YE) FOR OPEN | | | 1 Measure the resistance between the audio unit C344 pin 19, circuit 9-MD26 (BN/YE), harness side and the audio remote control C681 pin 2, circuit 9-MD26 (BN/YE), harness side. | | | Is the resistance less than 1 ohm? Yes INSTALL a new audio remote control. If the concern persists, INSTALL a new audio unit.
REFER to: Audio Unit - Vehicles Built Up To: 10/2005 (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST G : THE DVD PLAYER IS INOPERATIVE/DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | G1: CHECK THE DVD PLAYER FOR POWER | | | 1 Disconnect DVD Player C437. | | | 2 Measure the voltage between the DVD player C437 pin 1, circuit 29-MD8 (OG), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit 29-MD8 (OG). TEST the system for normal operation. If the concern persists, install a new CJB. Test the system for normal operation. | | G2: CHECK THE DVD PLAYER FOR SWITCHED POWER | | | 1 Ignition switch in position II. | | | | | | 2 Measure the voltage between the DVD player C437 pin 2, circuit 75-MD8 (YE/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit 75-MD8 (YE/BU). Test the system for normal operation. | | G3: CHECK THE DVD PLAYER FOR GROUND | | | 1 Ignition switch in position 0. | | | | | | 2 Measure the resistance between the DVD player C437 pin 3, circuit 31-MD8 (BK), harness side and ground. | | | Is the resistance less than 1 ohm? Yes Left-hand drive vehicles: INSTALL a new DVD player. Test the system for normal operation. No REPAIR circuit 31-MD8 (BK). Test the system for normal operation. | | G4: CHECK FROM THE DVD PLAYER TO HOOD SWITCH FOR OPEN | | | | | | 1 Measure the resistance between the DVD player C437 PIN 5, 31S-GL7A (BK-YE) and the hood switch C604 pin 1, 31S-GL7A (BK-YE). | | | Is the voltage greater than 1 ohm? Yes INSTALL a new DVD player. Test the system for normal operation. No REPAIR circuit 31S-GL7A (BK/YE). Test the system for normal operation. | |
