Audio System: Troubleshooting
- DIAGNOSIS FUNCTION
- Diagnosis start-up For shifting to diagnosis mode, push "CD" button 3 times with pressing "1" and "6" of TRUCK TUNE APS button at the same time while the audio power is OFF and ACC is ON.
In diagnosis mode, by pressing "CD" button for 2 seconds or turning the ignition key OFF, the diagnosis mode is released.
- Service check mode
- After the diagnosis start-up, the system enters service check mode when "TUNE UP" switch is pressed.
- Error codes over tuner and connected equipment are displayed on the screen of tuner. Results for each check are displayed as follows:
- good:
No DTC is detected for both "System Check Confirmation" and "Diagnosis Memory Response".
- nCon:
The Component does not respond to the "Diagnosis On Instruction" command. Applicable to only the system where connected components are limited to be used.
- ECHn:
Application of new version has been confirmed by the "Diagnosis On Check", and there is one or more DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response".
- CHEC:
Application of new version has been confirmed by the "Diagnosis On Check", and there is no DTC which indicates "Replacement" in the "System Check Result Response" or "Diagnosis Memory Response", but one or more DTC which indicated "Check" is identified.
- Old:
Application of old version is confirmed by the "Diagnosis On Check", and DTC is identified in the "System Check Result Response" or "Diagnosis Memory Response".
- nrES:
No response is identified to the "System Check Start Instruction" and "Request for System Check Result" commands.
- good:
- Display Screen for Service Check.
Example:
Connection parts ( physical address): Multi Display (P160), Radio Receiver (P190), CD changer (P360)
- "ECHN" Detail Display Mode Screen
- "CHEC" Detail Display Mode Screen
- "OLD" Detail Display Mode Screen
- Recheck
- Pressing the [ch1] key in Service Check Mode executes recheck.
- To display the recheck process, follow the sequence indicated Display Screen for Service Check.
- Diagnosis start-up For shifting to diagnosis mode, push "CD" button 3 times with pressing "1" and "6" of TRUCK TUNE APS button at the same time while the audio power is OFF and ACC is ON.
- DIAGNOSIS CODE LIST
Physical address: 190 Radio receiver assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Physical address: 440 Stereo component amplifier
NOTE:- *1: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
- *2: It may be stored when the engine key is turned 1 min. again after engine start.
- *3: It may be stored when the engine key is turned again after engine start.
- *4: When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- PROBLEM SYMPTOMS TABLE NOTE: When replacing the internal mechanism (computer part) of the audio system, be careful that no part of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the replacement part (spare part).NOTE: This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during system operation and was prepared on the assumption of system component troubles (except for the wires and connectors, etc.).
Always inspect the trouble taking the following items into consideration.
- Open or short circuit of the wire harness
- Connector or terminal connection fault
PROBLEM SYMPTOMSComponent Problem Flow Chart No. Radio Radio Not Operating When Power Switch Turned To 'ON', 1 ..... Display Indicates When Power Switch Turned To 'ON', But No Sound (Including 'noise') Is Produced. 2 ..... Noise Present, But AM - FM Not Operating. 3 ..... Any Speaker Does Not Work. 4 ..... Any AM Or FM Does Not Work. 5 ..... Few Preset Turning Bands. 5 ..... Reception Poor. 6 ..... Sound Quality Poor. 7 ..... Preset Memory Disappears. 8 Tape Player Cassette Tape Cannot Be Inserted. 9 ..... Cassette Tape Inserted, But No Power. 10 ..... Power Coming In, But Tape Player Not Operating. 11 ..... Any Speaker Does Not Work. 12 ..... Sound Quality Poor. 13 ..... Tape Jammed, Malfunction With Tape Speed Or Auto-Reverse. 14 ..... Cassette Tape Will Not Eject. 15 Power Amplifier No Power Coming In. 16 ..... Power Coming In, But Power Amplifier Not Operating. 17 ..... Any Speaker Does Not Work. 18 Noise Noise Occurs 19 ..... Noise Produced By Vibration Or Shock While Driving. 20 ..... Noise Produced When Engine Starts. 21
The term "AM" includes LW, MW and SW, and the term "FW" includes UKW.
- RADIO: NOT OPERATING WHEN POWER SWITCH TURNED TO "ON"
- RADIO: DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED
- RADIO: NOISE PRESENT, BUT AM-FM NOT OPERATING
- RADIO: ANY SPEAKER DOSE NOT WORK
- RADIO: ANY AM OR FM DOES NOR WORK FEW PRESET TUNING BANDS
- RADIO: POOR RECEPTION
- RADIO: SOUND QUALITY POOR
- RADIO: PRESET MEMORY DISAPPEARS
- TAPE PLAYER: CASSETTE TAPE CANNOT BE INSERTED
- TAPE PLAYER: CASSETTE TAPE INSERTED, BUT NO POWER
- TAPE PLAYER: POWER COMING IN, BUT TAPE PLAYER NOT OPERATING
- TAPE PLAYER: ANY SPEAKER DOES NOT WORK
- TAPE PLAYER: SOUND QUALITY POOR (VOLUME FAINT)
- TAPE PLAYER: TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE
- TAPE PLAYER: CASSETTE TAPE WILL NOT BE EJECTED
- POWER AMPLIFIER: NO POWER COMING IN
- POWER AMPLIFIER: POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING
- POWER AMPLIFIER: ANY SPEAKER DOES NOT WORK
- NOISE: OCCURS
- NOISE: PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING
- NOISE: PRODUCED WHEN ENGINE STARTS