| Diagnosis and Testing Refer to Wiring Diagrams Section 415-01, for schematic and connector information. Inspection and Verification - Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart | Mechanical | Electrical | - Audio unit damage
- Cassette player jammed, not loading
- Compact Disc (CD) player jammed, not loading
- CD autochanger
- Remote control
- Antenna/alignment
- Speakers/water damage
- Incorrectly mounted
- Foreign objects contacting cone
- Accessory installation
- Trim resonance/ poorly fitted trim
| - Fuse(s)
- Fuse FB1 (3A)
- Connectors incorrectly assembled
- Loose or corroded connections
- Ground (Suppression) leads
- Over stressed wiring loom(s) internally damaged/chaffing of wires
- Circuit corruption via after market accessories
| - 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 6000 audio unit refer to the CD Error Codes - vehicles with 6000 Audio Unit
- for vehicles with CD changer refer to the CD Error Codes - vehicles with CD Changer
- If no error codes are displayed on the audio unit refer to the Self-Diagnostic Mode.
CD Error Codes - vehicles with 6000 Audio Unit Error Codes | Error Code | Error Description | Error Rectification | | E11 | SPI Bus Failure | CHECK and REPAIR the wiring harness. If the wiring harness is OK, DISCONNECT the audio unit power connector, SWITCH the audio unit ON and OFF four times then CONNECT the audio unit power connector. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E12 | Communications Error | CHECK and REPAIR the wiring harness. If the wiring harness is OK, DISCONNECT the audio unit power connector, SWITCH the audio unit ON and OFF four times then CONNECT the audio unit power connector. TEST the system for normal operation. If the error code is still displayed, INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E14 | Overtemp Error | The Audio unit is too hot, unit will not work until it has cooled down. Check the heater duct(s) are not bleeding hot air on to the radio. If the concern persists, INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E15 | Mechanical Error | Install a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E16 | CD Eject Failure | Install a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | CD Error Codes - vehicles with CD Changer Error Codes | Error Code | Error Description | Error Rectification | | E2 | Communications Error | CHECK and REPAIR the CD changer harness. REFER to the Component Test in this section. If the CD changer harness is OK. INSTALL a new CD changer.
REFER to: Compact Disc (CD) Changer - Vehicles Without: Navigation System (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E3 | 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 CD changer.
REFER to: Compact Disc (CD) Changer - Vehicles Without: Navigation System (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E4 | Overtemp Error | The CD changer is too hot, unit will not work until it has cooled down. Check the heater duct(s) are not bleeding hot air on to the CD changer. If the concern persists, INSTALL a new CD changer.
REFER to: Compact Disc (CD) Changer - Vehicles Without: Navigation System (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | E5 | Mechanical Error | Install a new CD changer.
REFER to: Compact Disc (CD) Changer - Vehicles Without: Navigation System (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. Within four seconds depress the preset buttons 3 and 6 together.
- Release the preset buttons 3 and 6 and the audio unit will enter the Self-Diagnostic Mode.
- To navigate through the audio unit Self-Diagnostic Mode, depress the preset button 6.
- To exit the Self-Diagnostic Mode do not press any button on the audio unit for 10 seconds.
- If the Self-Diagnostic Mode cannot be accessed, use WDS to diagnose the audio unit.
Self-Diagnostic Mode | Test | Syntax Displayed | Circuit Tested | Description | | 1. FM waveband check. | FM frequency received. | Antenna signal. | Tests signal from the antenna cable. | | 2. Traffic Announcement. | TP | Traffic announcement volume level. | Allows adjustment of the volume. | | 3. Test speaker circuit left hand front speaker. | 4CH LF for four channel system 2CH LF for two channel system. | Left hand front speaker circuit. | Test speaker circuit. | | 4. Test speaker circuit right hand front speaker. | 4CH RF for four channel system 2CH RF for two channel system. | Right hand front speaker circuit. | Test speaker circuit. | | 5. Test speaker circuit left hand rear speaker. | 4CH LR for four channel system. | Left hand rear speaker circuit. | Test speaker circuit. | | 6. Test speaker circuit right hand rear speaker. | 4CH RR for four channel system. | Right hand rear speaker circuit. | Test speaker circuit. | | 7. Test communications with compact disc autochanger (if equipped). | CDDJ OK if communications are achieved and NO CDDJ if no communications are achieved. | Compact disc communications circuit. | Test compact disc circuit. | - If the concern remains after the Self-Diagnostic Mode, refer to the Symptom Chart.
Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | The audio unit is inoperative | * Circuit(s). * Audio unit. | * | | The audio unit does not operate correctly | * Circuit(s). * Audio unit | * | | Audio unit display blank - Radio cassette operates | * Audio unit. | * Install a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
Test the system for normal operation. | | The CD changer is inoperative | * Fuse(s). * Circuit(s). * CD autochanger. | * | | Poor reception | * Antenna. * Antenna connections. * Suppression equipment. * Audio unit. | * | | Distorted sound from one or more speakers | * Speaker(s). * Trim resonance. * Audio unit. | * | | No sound from all speakers | * Speaker(s). * Audio unit. | * | CD Autochanger ERO Codes | Display Condition | Possible Causes | | Display Blank | Connection. | | `ERROR 02' | Connection. | | `ERROR 03' | Focusing Error. | | `ERROR 04' | Thermal shutdown. | | `ERROR 05' | Mechanical fault. | | `ERROR 06' | Unable to read disc(s). | | `ERROR 07' | Unable to read selected disc (displayed for 25 seconds then select next disc). | | `NO CD' | Slot empty (CD autochanger display for 25 seconds then select next disc). | | `NO DISCS' | Magazine empty. | Pinpoint Test NOTE:Use a digital multimeter for all electrical measurements. | PINPOINT TEST A : THE AUDIO UNIT IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK CIRCUIT 29S-LA40 (OG/BK) FOR VOLTAGE | | | 1 Ignition switch in position 0. | | | 2 Disconnect Audio Unit C443a. | | | 3 Ignition switch in position I. | | | 4 Measure the voltage between audio unit C443a pin 4 circuit 29S-LA40 (OG/BK), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit 29S-LA40 (OG/BK). TEST system for normal operation. | | A2: CHECK CIRCUIT 29-MD15 (OG/BK) AUDIO UNIT SUPPLY | | | 1 Measure the voltage between audio unit connector C443a pin 1, circuit 29-MD15 (OG/BK), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit 29-MD15 (OG/BK). TEST the system for normal operation. | | A3: CHECK GROUND CIRCUIT 91-MD15 (BK/GN) FOR OPEN | | | 1 Measure the resistance between audio unit C443a pin 2 and 6, circuit 91-MD15 (BK/GN), harness side and ground. | | | Are the resistances less than 1 ohm? Yes INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR circuit 91-MD15 (BK/GN). TEST the system for normal operation. | | PINPOINT TEST B : THE AUDIO UNIT DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK AUDIO UNIT FOR CORRECT OPERATION | | | 1 Ignition switch in position I. | | | 2 Switch on the audio unit. | | | 3 Use the Description and Operation Section 415-01 to check the audio unit features and functions. | | | Does the audio unit operate correctly? Yes Make sure that the customer understands the audio unit operation. Use the Audio Guide supplied with the vehicle. No INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. If the vehicle is fitted with radio navigation system (RNS) 1.
REFER to: Navigation System (419-07A Navigation System - Vehicles With: Radio Navigation System (RNS) 1, Diagnosis and Testing).
If the vehicle is fitted with radio navigation system (RNS) 2.
REFER to: Navigation System - Vehicles Built Up To: 05/1999 (419-07B Navigation System - Vehicles With: Radio Navigation System (RNS) 2, Diagnosis and Testing).
or
REFER to: Navigation System - Vehicles Built From: 05/1999 (419-07B Navigation System - Vehicles With: Radio Navigation System (RNS) 2, Diagnosis and Testing).
| | PINPOINT TEST C : THE CD CHANGER IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK OPERATION OF THE CD AUTOCHANGER | | | 1 Ignition switch in position I. | | | 2 Verify audio unit operates correctly. | | | 3 Select the CD function on the audio unit. | | | Is the CD Autochanger information displayed on the audio unit? Yes No | | C2: ERROR MESSAGE - DISPLAY CONDITION | | | 1 Select CD on audio unit. | | | Is an error code displayed (example ERROR 04)? Yes GO TO Error Codes in this section. No | | C3: CHECK FUSE FB1 (3A) | | | 1 Ignition switch in position 0. | | | 2 CHECK Fuse FB1 (3A). | | | Is the fuse OK? Yes No INSTALL a new fuse FB1 (3A). TEST the system for normal operation. If fuse fails again GO to C4. | | C4: TEST THE AUDIO UNIT TO CD CHANGER HARNESS | | | 1 Disconnect CD changer C1875. | | | 2 Disconnect Audio unit C443d. | | | 3 Carry out the CD changer harness component test. | | | Is the audio unit to CD changer harness OK? Yes No REPAIR or INSTALL a new CD changer harness. TEST the system for normal operation. | | C5: CHECK FOR CORRECT OPERATION OF CD CHANGER | | | 1 Substitute a known good CD changer. | | | 2 Verify correct operation of the substitute CD changer. | | | Do all CD changer functions operate correctly? Yes INSTALL a new CD changer.
REFER to: Compact Disc (CD) Changer - Vehicles Without: Navigation System (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REMOVE the substitute CD changer. INSTALL the original CD changer. Then INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. | | PINPOINT TEST D : POOR RECEPTION | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK THE ANTENNA CABLE SHIELD | | | 1 Ignition switch in position 0. | | | 2 Disconnect the antenna cable from the audio unit. | | | 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 audio unit case ground and the antenna mast base connection to the body. If concern persists, INSTALL a new antenna cable. TEST the system for normal operation. | | D2: CHECK THE ANTENNA CENTER CONDUCTOR FOR OPEN | | | 1 Measure the resistance of the center conductor between ends of the antenna cable. | | | Is the resistance less than 1 ohm? Yes No CHECK in-line connectors INSTALL a new antenna cable. TEST the system for normal operation. | | D3: 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 grounding points at the base of the antenna, audio unit case and battery negative cable to body. If concern persists, INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No INSTALL a new antenna cable. TEST the system for normal operation. | | PINPOINT TEST E : DISTORTED SOUND FROM ONE OR MORE SPEAKER | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | E1: CHECK AUDIO UNIT CONTROL OF SPEAKER(S) | | | 1 Ignition switch in position I. | | | 2 Switch on the audio unit. | | | 3 With concern evident use fade/balance control to pinpoint which speaker(s) affected. | | | Is distortion present only at high volume? Yes Ensure customer understands operation. Use the Audio Guide, supplied with the vehicle. No | | E2: CHECK SPEAKER CIRCUIT RESISTANCE | | | 1 Ignition switch in position 0. | | | 2 Disconnect Audio Unit C443b. | | | 3 Measure the resistance between pins for the appropriate speaker(s). - C443b pin 1, circuit 1-MD10 (WH/BK) and pin 2, circuit 2-MD-10 (GY/BK) (left hand front), harness side.
- C443b pin 3, circuit 1-MD11 (WH/VT) and pin 4, circuit 2-MD11 (GY/WH) (left hand rear), harness side.
- C443b pin 5, circuit 1-MD17 (WH/RD) and pin 6, circuit 2-MD17 (GY/RD) (right hand front), harness side.
- C443b pin 7, circuit 1-MD18 (WH) and pin 8, circuit 2-MD18 (GY) (right hand rear), harness side.
| | | Is the resistance 4.5 ohms? Yes No | | E3: CHECK RESISTANCE OF SPEAKER | | | 1 Ignition switch in position 0. | | | 2 Disconnect Speaker Connector. | | | 3 Measure the resistance between the terminals on the back of the appropriate speaker(s). | | | Is the resistance 4.5 ohms? Yes No INSTALL a new speaker.
REFER to: Front Door Speaker (415-03 Speakers, Removal and Installation).
TEST the system for normal operation. | | E4: CHECK SPEAKER CIRCUIT CONTINUITY | | | 1 Measure the resistance between the audio unit and the speaker connector on the appropriate speaker(s). - C443b pin 1, circuit 1-MD10 (WH/BK) and C938 pin 1, circuit 1-MD28 (WH) (left hand front), harness side.
- C443b pin 2, circuit 2-MD10 (GY/BK) and C938 pin 2, circuit 2-MD28 (GY) (left hand front), harness side.
- C443b pin 3, circuit 1-MD11 (WH/VT) and C939 pin 2, circuit 1-MD29 (WH/VT) (left hand rear), harness side.
- C443b pin 4, circuit 2-MD11 (GY/WH) and C939 pin 1, circuit 2-MD29 (GY/WH) (left hand rear), harness side.
- C443b pin 5, circuit 1-MD17 (WH/RD) and C937 pin 1, circuit 1-MD28 (WH) (right hand front), harness side.
- C443b pin 6, circuit 2-MD17 (GY/RD) and C937 pin 2, circuit 2-MD28 (GY) (right hand front), harness side.
- C443b pin 7, circuit 1-MD18 (WH) and C1872 pin 2, circuit 1-MD29 (WH/VT) (right hand rear), harness side.
- C443b pin 8, circuit 2-MD18 (GY) and C1872 pin 1, circuit 2-MD29 (GY/WH) (right hand rear), harness side.
| | | Is the resistance less than 1 ohm? Yes INSTALL a new speaker as required.
REFER to: Front Door Speaker (415-03 Speakers, Removal and Installation).
TEST the system for normal operation. No REPAIR appropriate circuit. TEST the system for normal operation. | | PINPOINT TEST F : NO SOUND FROM ALL SPEAKERS | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | F1: CHECK SOUND FROM ALL SPEAKERS | | | 1 Ignition switch in position I. | | | 2 Switch on the audio unit. | | | 3 Check FADE and BALANCE controls; Fade to each speaker in turn to test. | | | Are all the speakers without sound? Yes No | | F2: CHECK SPEAKER POSITIVE CIRCUIT FOR SHORT TO GROUND | | | 1 Disconnect Audio Unit C443b. | | | 2 Measure the resistance of the appropriate speaker circuit between; - C443b pin 1, circuit 1-MD10 (WH/BK), harness side and ground (left hand front).
- C443b pin 3, circuit 1-MD11 (WH/VT), harness side and ground (left hand rear).
- C443b pin 5, circuit 1-MD17 (WH/RD), harness side and ground (right hand front).
- C443b pin 7, circuit 1-MD18 (WH), harness side and ground (right hand rear).
| | | Is the resistance greater than 10,000 ohms (open circuit)? Yes No REPAIR the appropriate circuit. TEST the system for normal operation. | | F3: CHECK SPEAKER NEGATIVE CIRCUIT FOR SHORT TO GROUND | | | 1 Measure the resistance of the appropriate speaker circuit between; - C443b pin 2, circuit 2-MD10 (GY/BK), harness side and ground (left hand front).
- C443b pin 4, circuit 2-MD11 (GY/WH), harness side and ground (left hand rear).
- C443b pin 6, circuit 2-MD17 (GY/RD), harness side and ground (right hand front).
- C443b pin 8, circuit 2-MD18 (GY), harness side and ground (right hand rear).
| | | Is the resistance greater than 10,000 ohms (open circuit)? Yes INSTALL a new audio unit.
REFER to: Audio Unit (415-01 Audio Unit, Removal and Installation).
TEST the system for normal operation. No REPAIR the appropriate circuit. TEST the system for normal operation. | Component Test CD Changer Harness -
NOTE:Refer to the Wiring Diagram, Section 415-01 for schematic and connector information. Using a multimeter, test the CD changer harness using the following table as a guide to meter lead placement as well as expected values. | CD Changer C1875 | Audio Unit C433d | Expected Value | | Pin 1 | Pin 1 | Less than 1 ohm | | Pin 3 | Pin 3 | Less than 1 ohm | | Pin 5 | Pin 5 | Less than 1 ohm | | Pin 6 | Pin 6 | Less than 1 ohm | | Pin 7 | Pin 7 | Less than 1 ohm | | Pin 8 | Pin 8 | Less than 1 ohm | | Pin 9 | Pin 9 | Less than 1 ohm | | Pin 10 | Pin 10 | Less than 1 ohm | | Pin 11 | Pin 11 | Less than 1 ohm | | Pin 12 | Pin 12 | Less than 1 ohm | | CD Changer C1875 | Negative Multimeter Lead | | | Pin 1 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 3 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 5 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 6 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 7 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 8 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 9 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 10 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 11 | Ground | Greater than 10,000 ohms (open circuit) | | Pin 12 | Ground | Greater than 10,000 ohms (open circuit) | - If routed here from a Pinpoint Test, return to the Pinpoint Test
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