Audio System: Diagnosis Lexus LS III

HOW TO PROCEED WITH TROUBLESHOOTING

Troubleshoot in accordance with the procedure on the following pages.

DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODE CHART

1. GATEWAY ECU (Physical address: 1C4) HINT: Logical address: 01 (Communication control) DTC GATEWAY ECU - LOGICAL COMMUNICATION CONTROL CHART DTC Diagnosis item Condition Countermeasure and inspected parts D4 (1) Regular Communication Error Component in which this code is recorded has been disconnected after engine start. Or, when this code was recorded, multi-display was disconnected. Check harness for power supply system of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for power supply system of gateway ECU. Check harness for communication system of gateway ECU. (1) 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.
2. RADIO AND PLAYER (Physical address: 190) Logical address: 01 (Communication control) DTC RADIO AND PLAYER - LOGICAL COMMUNICATION CONTROL CHART DTC Diagnosis item Condition Countermeasure and inspected parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of radio and player. Check harness for communication system of radio and player. D8 (2) No Response to Connection Check Component shown by auxiliary code is or had been disconnected from system after engine Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. D9 (1) Last Mode Error Component operated (sounds and/or images were provided) before engine stop is or has been disconnected with ignition switch in ACC or ON. Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. DA No Response to ON/OFF Instruction No response is identified when changing mode (audio and visual mode change). Detected when sound and picture does not change by button operation. Check harness for power supply system of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. If error occurs again, replace component shown by auxiliary code. DB (1) Mode Status Error Dual alarm is detected. Check harness for power supply of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. DC (3) Transmission Error Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same auxiliary code is recorded in other component, check harness for power supply and communication system of all components shown by code. DD (4) Master Reset (Momentary Interruption) After engine was started, multi-display assembly was disconnected from system. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of radio and player. Check harness for communication system of radio and player. If this error occurs frequently, replace multi-display assembly. DE (4) Slave Reset (Momentary Interruption) After engine was started, slave component was disconnected from system. Check harness for power supply of component shown by auxiliary code. Check harness for communication system of component shown by auxiliary code. DF (5) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and sub-master component. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E1 (1) Audio processor ON error While source equipment is operating, AMP output is stopped. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting the engine. (2) This code is stored when 180 sec. has passed after the power supply connector is pulled out after engine start. (3) This code may be stored when the engine key is turned again 1 min. after engine start. (4) This code may be stored when the engine key is turned again after engine start. (5) 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. Logical address: 61 (Cassette switch) DTC LOGICAL 61 CASSETTE SWITCH CHART DTC Diagnosis item Condition Countermeasure and inspected parts 40 Mechanical error of Media Malfunction due to mechanical failure is identified. Or cassette tape is cut or entangled. Inspect cassette tape. Replace radio and player. Logical address: 63 (In-dash CD changer) DTC LOGICAL 63 IN-DASH CD CHANGER CHART DTC Diagnosis item Condition Countermeasure and inspected parts 42 No Disc Readout Disc cannot be read. Inspect CD. 44 CD Error Error is detected in CD player. Replace radio and player. 45 EJECT Error Disc cannot be ejected. Replace radio and player. 47 CD High Temp. High temperature is detected in CD changer. Replace radio and player. 48 CD Excess Current Excess current is applied to CD changer. Replace radio and player.
3. STEREO COMPONENT AMPLIFIER (Physical address: 440) Logical address: 01 (Communication control) DTC STEREO COMPONENT AMPLIFIER - LOGICAL COMMUNICATION CONTROL CHART DTC Diagnosis item Condition Countermeasure and inspected parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. D7 Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. DC (2) Transmission Error Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same auxiliary code is recorded in other component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine was started, multi-display assembly was disconnected from system. Check harness for power supply of radio and player. Check harness for communication system of radio and player. Check harness for power supply of stereo component amplifier. Check harness for communication system of stereo component amplifier. If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and sub-master component. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E1 (1) Audio processor ON error While source equipment is operating, AMP output is stopped. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from multi-display assembly. Replace multi-display assembly. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Registration Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine (2) This code be stored when the engine key is turned again 1 min. after engine start. (3) This code 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.
4. STEREO COMPONENT TURNER (Physical address: 1FO) Logical address: 01 (Communication control) DTC STEREO COMPONENT TURNER - LOGICAL COMMUNICATION CONTROL CHART DTC Diagnosis item Condition Countermeasure and inspected parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of radio and player. Check harness for communication system radio and player. D7 Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of radio and player. Check harness for communication system radio and player. DC (2) Transmission Error Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same auxiliary code is recorded in other component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start multi-display assembly was disconnected from system. Check harness for power supply system of stereo component tuner. Check harness for communication system of stereo component tuner. Check harness for power supply system of radio and player. Check harness for communication system radio and player. If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and radio and player. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E2 ON/OFF Instruction Parameter Error Error occurs in ON/OFF controlling command from radio and player. Replace radio and player. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1 min. after engine start. (3) This code 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.
5. AUDIO AND A/C CONTROL SWITCH (Physical address: 1CO) Logical address: 01 (Communication control) DTC AUDIO AND A/C CONTROL SWITCH - LOGICAL COMMUNICATION CONTROL CHART DTC Diagnosis item Condition Countermeasure and inspected parts D6 (1) Absence of Master Component in which this code is recorded has been disconnected from system with ignition in ACC or ON. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system audio and rear A/C control switch. D7 (2) Communication Check Error Component in which this code is recorded is or was disconnected from system after engine start. Or, when this code was recorded, multi-display assembly was disconnected. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system audio and rear A/C control switch DC (2) Transmission Error Transmission to component shown by auxiliary code has been failed. (Detecting this DTC does not necessarily mean actual failure.) If same auxiliary code is recorded in other component, check harness for power supply and communication system of all components shown by code. DD (3) Master Reset (Momentary Interruption) After engine start, multi-display assembly was disconnected from system. Check harness for power supply system of multi-display. Check harness for communication system of multi-display. Check harness for power supply system of audio and rear A/C control switch. Check harness for communication system of audio and rear A/C control switch If this error occurs frequently, replace multi-display assembly. DF (4) Master Error Due to defective condition of component with a display, master function is switched to audio equipment. Error occurs in communication between sub-master (audio) and master component. Check harness for power supply of multi-display assembly. Check harness for communication system of multi-display assembly. Check harness for communication system between multi-display assembly and radio and player. E0 (1) Registration Completion Instruction Error "Registration Completion Instruction" command from master cannot be received. Since this DTC is provided for engineering, it may be detected when no actual failure exists. E3 (1) Registration Request Transmission Registration Request command is output from slave component. Receiving Connection Check Instruction, Registration Request command is output from sub-master component. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. E4 (1) Multiple Frame Abort Multiple frame transmission is aborted. Since this DTC is provided for engineering purpose, it may be detected when no actual failure exists. (1) Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine. (2) This code may be stored when the engine key is turned again 1. min after engine start. (3) This code 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.

Scheme 1

Scheme 2

Scheme 3

Scheme 4

1. RADIO AND PLAYER (Scheme 1): Identifying Terminals Of Radio And Player TERMINALS OF RADIO AND PLAYER DESCRIPTION CHART (1 OF 2) Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) R5-2 (ATX+) G (1) (2) See "Service Check Mode" - R5-3 (TXS+) G See "Service Check Mode" - R5-5 (ATX-) R (1) B (2) See "Service Check Mode" - R5--6 (TXS-) R See "Service Check Mode" - R4-1 - R4--20 (+B-GND) L-Y - BR Constant 10--14V R5-2 - R4--20 (ATX+ - GND) G - BR (1) Y - BR (2) Light control switch TAIL or HEAD 10--14V R4--5 (TX+) G See "Service Check Mode" - R4--7 - R4--20 (MUTE - GND) Y-BR Switching CD player <-> Cassette player Below 3.5 V R4--8 - R4--20 (R+ - GND) B - BR Audio system is sounding A waveform synchronized with sound is output R4--9 - R4--20 (L+ - GND) R - BR Audio system is sounding A waveform synchronized with sound is output R4--10 - Body ground (SGND - Body ground) - Constant Below 1 V R4--11 - R4--20 (ACC - GND) GR - BR Ignition switch OFF Below 1 V Ignition switch ACC or ON 10--14V R4--12 - R4--20 (ILL- - GND) W-G - B-R Headlight switch ON, Automatic light sensor ON and Tail cancel switch OFF simultaneously 10--14V R4--15 (TX-) R See "Service Check Mode" - R4--18 - R4--20 (R- - GND) W - BR Audio system is sounding A waveform synchronized with sound is output R4--19 - R4--20 (L- - GND) G - BR Audio system is sounding A waveform synchronized with sound is output R4--20 - Body ground (SGND - Body ground) BR - Body ground Constant Below 1 V (1) LHD (2) RHD TERMINALS OF RADIO AND PLAYER DESCRIPTION CHART (2 OF 2) Terminal No. (Symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. R5-2 (ATX+) Navigation system does not operate. System does not operate. R5-3 (TXS+) Steering pad switch does not operate. System does not operate. R5-5 (ATX-) Navigation system does not operate. System does not operate. R5--6 (TXS-) Steering pad switch does not operate. System does not operate. R4-1 - R4--20 (+B - GND) Radio and player does not operate. Fuse is blown. R5-2 - R4--20 (ATX+ - GND) Radio and player illumination does not light up.. Fuse is blown. R4--5 (TX+) Navigation system does not operate. System does not operate. R4--7 - R4--20 (MUTE - GND) Pop sound etc. Speaker does not sound. R4--8 - R4--20 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. R4--9 - R4--20 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. R4--10 - Body ground (SGND - Body ground) Audio system is normal. Audio system is normal. R4--11 - R4--20 (ACC - GND) Navigation system does not operate. Fuse is blown. R4--12 - R4--20 (ILL- - GND) Radio and player illumination does not light up. Light control rheostat does not operate. R4--15 (TX-) Navigation system does not operate. System does not operate. R4--18 - R4--20 (R- - GND) Sound from right side speaker is small. Sound from right side speaker is small. R4--19 - R4--20 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. R4--20 - Body ground (GND - Body ground) System does not operate. Audio system is normal.
2. STEREO COMPONENT AMPLIFIER (Scheme 2): Identifying Stereo Component Amplifier Terminals STEREO COMPONENT AMPLIFIER TERMINALS DESCRIPTION CHART (1 Of 2) Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) S32-1 - S34-13 (MR+ - GND) B - W-B Audio system is sounding (Radio) A waveform synchronized with sound is output S32-2 - S34-13 (ML+ - GND) R - W-B Audio system is sounding (Radio) A waveform synchronized with sound is output S32-4 - S34-13 (MMUT - GND) Y - W-B Radio switch ON Below 3.5V S32-6 - S34-13 (MR- - GND) W - W-B Audio system is sounding (Radio) A waveform synchronized with sound is output S32-7 - S34-13 (ML- - GND) G - W-B Audio system is sounding (Radio) A waveform synchronized with sound is output S32-9 (RTX-) LG See "Service Check Mode" - S32-10 (RTX+) L See "Service Check Mode" - S34-1 - S34-13 (FR+ - GND) LG - W-B( (1), (2), (4) ) G - W-B( (2), (3) ) Audio system is sounding A waveform synchronized with sound is output S34-2 - S34-13 (FL+ - GND) P - W-B Audio system is sounding A waveform synchronized with sound is output S34-3 - S34-13 (RR+ - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S34-4 - S34-13 (RL+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S34-5 - S34-13 (WFR+ - GND) Y - W-B Audio system is sounding A waveform synchronized with sound is output S34-6 - S34-13 (WFL+ - GND) LG - W-B Audio system is sounding A waveform synchronized with sound is output S34-7 - S34-13 (+B - GND) L-R - W-B Constant 10--14V S34-8 - S34-13 (FR- - GND) L - W-B( (1), (2), (4) ) G - B - W - B( (2), (3) ) Audio system is sounding A waveform synchronized with sound is output S34-9 - S34-13 (FL- - GND) V - W-B Audio system is sounding A waveform synchronized with sound is output S34-10 - S34-13 (RR- - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S34-11 - S34-13 (RL- - GND) Y - W-B Audio system is sounding A waveform synchronized with sound is output S34-12 - Body ground (E - Body ground) W-B - Body ground Constant Below 1 V S34-13 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V S34-14 - S34-13 (WFR- - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S34-15 - S34-13 (WFL- - GND) L - W-B Audio system is sounding A waveform synchronized with sound is output S34-16 - S34-13 (+B2 - GND) L-R - W-B Constant 10--14V S33-1 - S34-13 (FR+ - GND) G-W - W-B Audio system is sounding A waveform synchronized with sound is output S33-2 - S34-13 (FL+ - GND) V - W-B Audio system is sounding A waveform synchronized with sound is output S33-3 - S34-13 (TMUT - GND) LG-R - W-B Cellular mobile telephone is being used Below 3.5 V S33-4 (TX+) L See "Service Check Mode" - S33-5 (MTX+) G See "Service Check Mode" - S33-9 - S34-13 (N-MU - GND) G-R - W-B Navigation voice sounding Below 3.5 V S33-11 - S34-13 (R+ - GND) B - W-B CD player or cassette player is sounding A waveform synchronized with sound is output S33-12 - S34-13 (L+ - GND) R - W-B CD player or cassette player is sounding A waveform synchronized with sound is output S33-13 - S34-13 (SPD - GND) V-W - W-B See "Vehicle Signal Check Mode" - S33-14 - S34-13 (FR- - GND) BR - W-B Audio system is sounding A waveform synchronized with sound is output S33-15 - S34-13 (FL- - GND) P - W-B Audio system is sounding A waveform synchronized with sound is output S33-17 (TX-) LG See "Service Check Mode" - S33-18 (MTX-) R See "Service Check Mode" - S33-20 - S34-13 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10--14V S33-21 - S34-13 (MUTE - GND) Y - W-B Switching CD player <-> Cassette player Below 3.5 V S33-23 - S34-13 (R- - GND) W - W-B CD player or cassette player is sounding A waveform synchronized with sound is output S33-24 - S34-13 (L- - GND) G - W-B CD player or cassette player is sounding A waveform synchronized with sound is output S33-25 - S34-13 (SPDO - GND) Y-R - W-B See "Vehicle Signal Check Mode" - (1) LHD (2) *2: RHD (3) *3: w/ LEXUS Navigation System (4) *4: w/o LEXUS Navigation System STEREO COMPONENT AMPLIFIER TERMINALS DESCRIPTION CHART (2 Of 2) Terminal No. (Symbols) Problem system when open circuit is detected. Problem symptom when short circuit is detected. S32-1 - S34-13 (MR+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S32-2 - S34-13 (ML+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S32-4 - S34-13 (MMUT - GND) Pop sound etc. Speaker does not sound. S32-6 - S34-13 (MR- - GND) Sound from right side speaker is small. Sound from right side speaker is small. S32-7 - S34-13 (ML- - GND) Sound from left side speaker is small. Sound from left side speaker is small. S32-9 (RTX-) Navigation system does not operate. Navigation system does not operate. S32-10 (RTX+) Navigation system does not operate. Navigation system does not operate. S34-1 - S34-13 (FR+ - GND) Front right side speaker does not sound. (1) Front right side speaker does not sound. (2) All speakers does not sound. S34-2 - S34-13 (FL+ - GND) Front left side speaker does not sound. (1) Front left side speaker does not sound. (2) All speakers does not sound. S34-3 - S34-13 (RR+ - GND) Rear right side speaker does not sound. (1) Rear right side speaker does not sound. (2) All speakers does not sound. S34-4 - S34-13 (RL+ - GND) Rear left side speaker does not sound. (1) Rear left side speaker does not sound. (2) All speakers does not sound. S34-5 - S34-13 (WFR+ - GND) (1): Woofer does not sound. (2): Sound from woofer is small. (1), (2) Woofer does not sound. S34-6 - S34-13 (WFL+ - GND) (1): Woofer does not sound. (2): Sound from woofer is small. (1), (2) Woofer does not sound. S34-7 - S34-13 (+B - GND) If terminal 16 is disconnected, system does not function. Fuse is blown. S34-8 - S34-13 (FR- - GND) Front right side speaker does not sound. (1) Audio system is normal. (2) All speakers does not sound. S34-9 - S34-13 (FL- - GND) Front left side speaker does not sound. (1) Front left side speaker is normal. (2) All speakers does not sound. S34-10 - S34-13 (RR- - GND) Rear right side speaker does not sound. (1) Rear right side speaker is normal. (2) All speakers does not sound. S34-11 - S34-13 (RL- - GND) Rear left side speaker does not sound. (1) Rear left side speaker is normal. (2) All speakers does not sound. S34-12 - Body ground (GND - Body ground) If terminal 13 is disconnected, system does not function. Audio system is normal. S34-13 - Body ground (GND - Body ground) If terminal 12 is disconnected, system does not function. Audio system is normal. S34-14 - S34-13 (WFR- - GND) (1) - (2) Sound from woofer is small. (1) - (2) All speakers does not sound. S34-15 - S34-13 (WFL- - GND) (1) - (2) Sound from woofer is small. (1) - (2) All speakers does not sound. S34-16 - S34-13 (+B2 - GND) If terminal 7 is disconnected, system does not function. Fuse is blown. S33-1 - S34-13 (FR+ - GND) Right side tweeter speaker does not sound. (1) Right side tweeter speaker does not sound. (2) All speakers does not sound. S33-2 - S34-13 (FL+ - GND) Left side tweeter speaker does not sound. (1) Left side tweeter speaker does not sound. (2) All speakers does not sound. S33-3 - S34-13 (TMUT - GND) Mute cannot be activated during telephone call. All speakers does not sound. S33-4 (TX+) Navigation system does not operate. System does not operate. S33-5 (MTX+) Audio rear A/C control switch does not operate. System does not operate. S33-9 - S34-13 (N-MU - GND) Pop sound etc. Front right speaker does not sound. S33-11 - S34-13 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S33-12 - S34-13 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S33-13 - S34-13 (SPD - GND) Navigation operation is available during, or a cursor on present site does not move. (ASL does not operate) Navigation operation is available during, or a cursor on present site does not move. (ASL does not operate) S33-14 - S34-13 (FR- - GND) Right side tweeter speaker does not sound. (1) Audio system is normal. (2) All speakers do not sound. S33-15 - S34-13 (FL- - GND) Left side tweeter speaker does not sound. (1) Audio system is normal. (2) All speakers do not sound. S33-17 (TX-) Navigation system does not operate. System does not operate. S33-18 (MTX-) Does not operate. System does not operate. S33-20 - S34-13 (ACC - GND) Audio & rear A/C control switch does not sound. Fuse is blown. S33-21 - S34-13 (MUTE - GND) Pop sound etc. Audio system does not sound. S33-23 - S34-13 (R- - GND) Sound from right side speaker is small. Sound from right side speaker is small. S33-24 - S34-13 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. S33-25 - S34-13 (SPDO - GND) Navigation operation is available during, or a cursor on present site does not move. (ASL does not operate) Navigation operation is available during, or a cursor on present site does not move. (ASL does not operate) (1) Mark Levinson (2) Pioneer
3. STEREO COMPONENT TUNER (Scheme 3): Identifying Stereo Component Tuner Terminals STEREO COMPONENT TUNER TERMINALS DESCRIPTION CHART (1 OF 2) Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) S35-1 - S35-25 (B - GND) L-Y - W-B Constant 10--14V S35-2 - S35-25 (SG - GND) - Constant Below 1 V S35-3 - S35-25 (R+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output S35-4 - S35-25 (L+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output S35-8 (ATX+) L See "Service check Mode" - S35-9 (TXS+) G See "Service check Mode" - S35-11 - S35-25 (MUTE - GND) Y - W-B Switching AM switch <-> FM switch Below 3.5 V S35-14 - S35-25 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or OFF 10--14V S35-16 - S35-25 (R- - GND) W - W-B Audio system is sounding A waveform synchronized with sound is output S35-17 - S35-25 (L- - GND) G - W-B Audio system is sounding A waveform synchronized with sound is output S35-20 (ATX+) LG See "Service check Mode" - S35-21 (TXS-) R See "Service check Mode" - S35-25 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V STEREO COMPONENT TUNER TERMINALS DESCRIPTION CHART (2 OF 2) Terminal No. (symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. S35-1 - S35-25 (B - GND) Stereo component tuner Fuse is blown. S35-2 - S35-25 (SG - GND) Audio system is normal. Audio system is normal. S35-3 - S35-25 (R+ - GND) Sound from right side speaker is small. Sound from right side speaker is small. S35-4 - S35-25 (L+ - GND) Sound from left side speaker is small. Sound from left side speaker is small. S35-8 (ATX+) Navigation system does not operate. System does not operate. S35-9 (TXS+) Navigation system does not operate. System does not operate. S35-11 - S35-25 (MUTE - GND) Pop sound ETC. Does not sound. S35-14 - S35-25 (ACC - GND) Stereo component tuner does not operate. Fuse is blown. S35-16 - S35-25 (R- - GND) Sound from right side speaker is small. Sound from right side speaker is small. S35-17 - S35-25 (L- - GND) Sound from left side speaker is small. Sound from left side speaker is small. S35-20(ATX-) Navigation system does not operate. System does not operate. S35-21 (TXS-) Navigation system does not operate. System does not operate. S35-25 - Body ground (GND - Body ground) Stereo component tuner does not operate. Audio system is normal.
4. AUDIO AND REAR A/C CONTROL SWITCH (Scheme 4): Identifying Audio And Rear A/C Control Switch Terminals AUDIO AND REAR A/C CONTROL SWITCH TERMINALS DESCRIPTION CHART (1 OF 2) Symbols (Terminals No.) Wiring Color Condition STD Voltage (V) A38-1 - A38-10 (TX+ - GND) G - W-B Constant 10--14V A38-1 (TX+) G See "Service Check Mode" - A38-10 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V A38-9 - A38-10 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V Ignition switch ACC or ON 10--14V A38-6 - A38-10 (TX- - GND) R - W-B Light control switch OFF Below 1 V Light control switch TAIL or HEAD 10 -- 14 V A38-7 - A38-10 (ILL- - GND) W-B - W-B Rear center arm-rest is closing. (rear center arm-rest courtesy switch ON) Below 3 V A38-6 (TX-) R See "Service Check Mode" - AUDIO AND REAR A/C CONTROL SWITCH TERMINALS DESCRIPTION CHART (2 OF 2) Terminal No. (Symbols) Problem symptom when open circuit is detected. Problem symptom when short circuit is detected. A38-1 - A38-10 (TX+ - GND) Audio and rear A/C control switch does not operate. Fuse is blown. A38-1 (TX+) Audio and rear A/C control switch does not operate. System does not operate. Audio and rear A/C control switch does not operate. Audio and rear A/C control switch does not operate. - A38-9 - A38-10 (ACC - GND) Audio and rear A/C control switch does not operate. Fuse is blown. A38-6 - A38-10 (TX- - GND) Rear seat control switch illumination does not light up. Rear seat control switch illumination does not light up. A38-7 - A38-10 (ILL- - GND) Audio and rear A/C control does not displayed. Audio and rear A/C control switch illumination does not light up. A38 - 6 (TX-) Audio and rear control switch does not operate. System does not operate.

PROBLEM SYMPTOMS TABLE

PROBLEM SYMPTOMS CHART

INSPECTION PROCEDURE

1. Check speaker that does not sound. PREPARATION: Disconnect the player connector. CHECK: Check the resistance between terminals 1 and 2. OK: Resistance: Except woofer: 2 -- 9 ohm Woofer: 2 -- 16 ohm NG : Replace the speaker. OK : Go to next step.
2. Check wire harness. PREPARATION: Disconnect the speaker connector. CHECK: Check continuity of wire harness. CHECK CONTINUITY OF WIRE HARNESS CHART Speaker that does not sound Check wire harness Front LH door speaker w/ LEXUS navigation system Navigation ECU (N15-2) - FR LH Speaker (D19-1) Navigation ECU (N15-11) - FR LH Speaker (D19-2) w/o LEXUS navigation system Stereo amplifier (S28-2) - FR LH Speaker (D19-1) Stereo amplifier (S28-9) - FR LH Speaker (D19-2) Front RH door speaker Stereo amplifier (S30-1) - FR RH Speaker (D20-1) Stereo amplifier (S30-8) - FR RH Speaker (D20-2) Rear LH door speaker Telephone relay (M4-1) - RR LH Speaker (R26-1) Telephone relay (M4-11) - RR LH Speaker (R26-2) Rear RH door speaker Stereo amplifier (S28-3) - RR RH Speaker (R27-1) Stereo amplifier (S28-10) - RR RH Speaker (R27-2) Front LH tweeter Stereo amplifier (S30-2) - FR LH tweeter (T18-1) Stereo amplifier (S30-15) - FR LH tweeter (T18-2) Front RH tweeter Stereo amplifier (S30-1) - FR RH tweeter (T19-1) Stereo amplifier (S30-14) - FR RH tweeter (T19-2) Rear LH tweeter Telephone relay (M4-1) - RR LH tweeter (T20-1) Telephone relay (M4-11) - RR LH tweeter (T20-3) Rear RH tweeter Stereo amplifier (S28-3) - RR RH tweeter (T21-1) Stereo amplifier (S28-10) - RR RH tweeter (T21-3) Woofer Stereo amplifier (S28-5) - Woofer (W5-2) Stereo amplifier (S28-6) - Woofer (W5-1) Stereo amplifier (S28-14) - Woofer (W5-4) Stereo amplifier (S28-15) - Woofer (W5-3) OK: Continuity NG : Replace or repair wire harness. OK : Replace component to which defective speaker is connected.

1. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness. OK : Replace radio and player.

1. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness. OK : Go to next step.
2. Check wire harness between radio and player and stereo component amplifier. PREPARATION: Disconnect the radio and player and stereo component amplifier connectors. CHECK: Check continuity of the wire harness between terminal R+ of the stereo component tuner and terminal R+ of the stereo component amplifier. Check continuity of the wire harness between terminal R- of the stereo component tuner and terminal R- of the stereo component amplifier. Check continuity of the wire harness between terminal L+ of the stereo component tuner and terminal L+ of the stereo component amplifier. Check continuity of the wire harness between terminal L- of the stereo component tuner and terminal L- of the stereo component amplifier. OK: Continuity NG : Replace or repair wire harness. OK : Replace radio and player.

1. Check stereo component tuner. PREPARATION: Disconnect the stereo component tuner connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity of terminal GND. OK: GND: Continuity NG : Replace or repair wire harness. OK : Go to next step.
2. Check wire harness between stereo component tuner and stereo component amplifier. PREPARATION: Disconnect the stereo component tuner and stereo component amplifier connectors. CHECK: Check continuity of the wire harness between terminal R+ of the stereo component tuner and terminal MR+ of the stereo component amplifier. Check continuity of the wire harness between terminal R- of the stereo component tuner and terminal MR- of the stereo component amplifier. Check continuity of the wire harness between terminal L+ of the stereo component tuner and terminal ML+ of the stereo component amplifier. Check continuity of the wire harness between terminal L- of the stereo component tuner and terminal ML- of the stereo component amplifier. OK: Continuity NG : Replace or repair wire harness. OK : Replace stereo component tuner.

1. Service check mode. (Stereo component amplifier, Radio and player and Stereo component tuner) NG : Go to step 4 . OK : Go to next step.
2. Check stereo component amplifier. PREPARATION: Disconnect the stereo component amplifier connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity of terminal GND. OK: GND: Continuity NG : Replace or repair wire harness connector. OK : Go to next step.
3. Check stereo component amplifier. CHECK: Check the voltage of terminals MUTE, N-MUTE and TMUT. Check speaker cable for short circuit. OK: MUTE, N-MUTE, TMUT: See STEREO COMPONENT AMPLIFIER of "TERMINAL OF ECU". NO : Replace or repair wire harness connector. OK : Replace stereo component amplifier.
4. Check "AVC-LAN communication circuit". CHECK: Check continuity of the wire harness between the stereo component amplifier and the radio and player. OK: Continuity NG : Replace or repair wire harness connector. OK : Replace stereo component amplifier.

1. Is this condition worse in comparison with other vehicle? Yes : Receiving environment is bad. NO : Go to next step.
2. Are there any parts installed, additionally? (Sunshade film, telephone antenna, etc.) Yes : Does the condition get better if removing them? Influence of those parts. NO : Go to next step.
3. Check if there is any scratch and breaking of a wire for glass antenna and defogger pattern. (Visual check) Yes : Repair damaged component. NO : Go to next step.
4. Is contact of radio plug jack OK? No : Take measures for contact. YES : Go to next step.
5. Is antenna terminal on glass surface in contact with defogger terminal? No : Take measures for contact. YES : Go to next step.
6. Is continuity of antenna cord OK? No : Replace antenna cord. YES : Go to next step.
7. Check grounding of antenna, antenna cord and noise filter. NG : Grounding failure. OK : Go to next step.
8. Does condition get better by replacing antenna cord? Yes : Replace antenna cord. No : Replace rear window glass.

1. Is there a foreign object inside tape player? Yes : Remove foreign object. NO : Go to next step.
2. Is auto search function of radio operating normally? NG : Radio and player is faulty. OK : Go to next step.
3. Check cassette tape for deformation or peeled label. NG : Replace cassette tape. OK : Go to next step.
4. Is cassette tape slack? NG : Remove slack before using. OK : Replace radio and player.

1. Check RADIO NO. 1, P-ACC and P-IG fuse. NG : Replace fuse. OK : Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness or connector. HINT: When sending it for repair, leave as it is without attempting to take it out by force. OK : Replace radio and player.

1. Check that a proper CD is inserted. Is it a CD and free from scratches or dirt? NG : Replace CD. OK : Go to next step.
2. Check that CD is not set upside down. NG : Set it properly. OK : Replace radio and player. HINT: When sending it for repair, leave as it is without attempting to take it out by force.

1. Check RADIO NO. 1, P-ACC and P-IG fuse. NG : Replace fuse. OK : Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness. OK : Replace radio and player. HINT: When sending it for repair, leave as it is without attempting to take it out by force.

1. Check sound, check if sound of radio, cassette tape, CD can be heard. OK : System check mod, Check radio and player. See «PRE-CHECK»(ref-198068-S28297940702005101400000) . NG : Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the vo1ltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness or connector. HINT: When sending it for repair, leave as it is without attempting to take it out by force. OK : Go to next step.
3. Check "AVC-LAN communication circuit", see AVC-LAN (COMMUNICATION BUS) CIRCUIT . CHECK: Check continuity of the wire harness between the multi display and the radio and player. OK: Continuity NG : Replace or repair AVC-LAN circuit. OK : Replace radio and player.

1. Check radio and player. CHECK: Check terminal ILL+. OK: ILL+: See RADIO AND PLAYER of "TERMINAL OF ECU". OK : Replace radio and player. NG : Replace and repair wire harness.

1. Pad switch operation check. (To examine whether audio system can be operated with the radio and player. OK : Go to step 3 . NG : Go to next step.
2. Check radio and player. PREPARATION: Disconnect the radio and player connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness or connector. OK : Replace radio and player.
3. Service check mode (Gateway ECU), see «PRE-CHECK»(ref-198068-S28297940702005101400000) . OK : Check gateway system. (Steering pad switch) NCON
4. Check gateway ECU. PREPARATION: Disconnect the gateway ECU connector. CHECK: Check the voltage of terminal +B. OK: +B: 10 -- 14 V CHECK: Check the voltage of terminal ACC when the ignition switch is in ACC or ON position. OK: ACC: 10 -- 14 V CHECK: Check continuity at terminal GND. OK: GND: Continuity NG : Replace or repair wire harness or connector. OK : Go to next step.
5. Check wire harness between gateway ECU and radio and player. PREPARATION: Disconnect the gateway ECU and radio and player connectors. CHECK: Check continuity of the wire harness between terminal GTX+ (9) of the gateway ECU and terminal TXS+ (3) of the radio and player. Check continuity of the wire harness between terminal GTX- (20) of the gateway ECU and terminal TXS- (6) of the radio and player. OK: Continuity NG : Replace or repair wire harness or connector. OK : Replace gateway ECU.

1. Service check mode, Audio and rear A/C control switch, see «PRE-CHECK»(ref-198068-S28297940702005101400000) . OK : Replace the audio and rear A/C control switch. NCON
2. Check "AVC-LAN communication circuit", see AVC-LAN (COMMUNICATION BUS) CIRCUIT . CHECK: Check continuity of the wire harness between the rear A/C amplifier and the audio and rear A/C control switch. OK: Continuity NG : Replace or repair AVC-LAN circuit. OK : Replace audio and rear A/C control switch.