Audio System - Diagnostics: Other Lexus GX J120

STEERING PAD SWITCH

SUSPECTED AREA DESCRIPTION

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1. INSPECT RADIO RECEIVER ASSY (BU, ACC, GND) Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S05049281082006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition GND <=> Body ground Always Continuity Check voltage between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S06156851932006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition BU <=> GND Always 10-14 V ACC <=> GND Ignition SW ACC 10-14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. CHECK FOR PROBLEM SYMPTOMS TABLE Check problem symptoms table. PROBLEM SYMPTOMS DESCRIPTION A Check of suspected areas is finished B Suspected areas still exist B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-228760-S41458227772006041100000) ) A: CHECK AND REPLACE RADIO RECEIVER ASSY

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1. INSPECT STEREO COMPONENT AMPLIFIER ASSY (+B, +B2, ACC, E, GND) Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S41245658952006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition E <=> Body ground Always Continuity GND <=> Body ground Always Continuity Check voltage between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S21484103242006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition +B <=> GND Always 10-14 V +B2 <=> GND Always 10-14 V ACC <=> GND Ignition SW ACC 10-14 V NG: REPAIR OF REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. CHECK FOR PROBLEM SYMPTOMS TABLE Check problem symptoms table. PROBLEM SYMPTOMS DESCRIPTION A Check of suspected areas is finished B Suspected areas still exist B PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-228760-S41458227772006041100000) ) A: CHECK AND REPLACE STEREO COMPONENT AMPLIFIER ASSY

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1. INSPECT MULTI-DISPLAY CONTROLLER SUB-ASSY (+B1, ACC, GND) Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S19786513232006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition GND <=> Body ground Always Continuity Check voltage between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S34607671052006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition +B1<=>GND Always 10-14 V ACC <=> GND Ignition SW ACC 10-14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
2. CHECK FOR PROBLEM SYMPTOMS TABLE Check problem symptoms table. PROBLEM SYMPTOMS DESCRIPTION A Check of suspected areas is finished B Suspected areas still exist B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE «PROBLEM SYMPTOMS TABLE»(ref-228760-S41458227772006041100000) ) A: CHECK AND REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSY

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1. INSPECT APPARATUS Choose the apparatus to be inspected. INSPECTION PROCEDURE A Stereo component amplifier assy B Stereo component controller assy C Multi-display control sub-assy B Go to step 4 . C Go to step 6 .
2. SERVICE CHECK MODE (STEREO COMPONENT AMPLIFIER ASSY) Perform service check. Start the diagnosis system and read check result for stereo component amplifier assy. Standard: SERVICE CHECK MODE A "NCON" is displayed or nothing is displayed (DSP AMP) B "GOOD" is displayed B CHECK AND REPLACE RADIO RECEIVER ASSY A: Go to next step.
3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the radio receiver assy and stereo component amplifier assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> TX- Continuity TX- <=> TX- Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> Body ground No Continuity TX- <=> Body ground No Continuity NG: REPAIR OF REPLACE HARNESS OR CONNECTOR OK: CHECK AND REPLACE STEREO COMPONENT AMPLIFIER ASSY
4. SERVICE CHECK MODE (STEREO COMPONENT CONTROLLER ASSY) Perform service check. Start the diagnosis system and read check result for stereo component controller assy. Standard: SERVICE CHECK MODE A "NCON" is displayed or nothing is displayed (RSA) B "GOOD" is displayed B CHECK AND REPLACE RADIO RECEIVER ASSY A: Go to next step.
5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT CONTROLLER ASSY) Disconnect the radio receiver assy and stereo component controller assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> TX2+ Continuity TX- <=> TX2- Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> - Body ground No Continuity TX- <=> Body ground No Continuity NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: CHECK AND REPLACE STEREO COMPONENT CONTROLLER ASSY
6. SERVICE CHECK MODE (MULTI-DISPLAY CONTROLLER SUB-ASSY) Perform service check. Start the diagnosis system and read check result for multi-display controller sub-assy. Standard: SERVICE CHECK MODE A "NCON" is displayed or nothing is displayed (RSE ECU) B "GOOD" is displayed B CHECK AND REPLACE RADIO RECEIVER ASSY A: Go to next step.
7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - MULTI-DISPLAY CONTROLLER SUB-ASSY) Disconnect the radio receiver assy and multi-display controller sub-assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> TX- Continuity TX- <=> TX- Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition TX+ <=> Body ground No Continuity TX- <=> Body ground No Continuity NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: CHECK AND REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSY

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1. ADJUST SOUND QUALITY Adjust the sound quality. Operate the radio receiver assy to adjust the sound quality. Standard: Malfunction disappears. OK: BAD SOUND QUALITY NG: Go to next step.
2. COMPARE IT WITH ANOTHER VEHICLE OF SAME MODEL Compare it with another vehicle of the same model. Compare with the vehicle of the same type which does not have trouble to see if there is any difference in the condition of trouble occurrence. Standard: No difference is found. OK: SETTING NG: Go to next step.
3. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSY - SPEAKER ASSY) Disconnect the stereo component amplifier assy and speakers. Check continuity of harness. TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition FL+ <=> 1 (Front No.1 speaker assy LH) Continuity FL- <=> 2 (Front No.1 speaker assy LH) Continuity FR+ <=> 1 (Front No.1 speaker assy RH) Continuity FR- <=> 2 (Front No.1 speaker assy RH) Continuity ML+ <=> 1 (Front No.2 speaker assy LH) Continuity ML- <=> 2 (Front No.2 speaker assy LH) Continuity MR+ <=> 1 (Front No.2 speaker assy RH) Continuity MR- <=> 2 (Front No.2 speaker assy RH) Continuity ML+ <=> 1 (Stereo component speaker assy LH) Continuity ML- <=> 2 (Stereo component speaker assy LH) Continuity MR+ <=> (Stereo component speaker assy RH) Continuity MR- <=> (Stereo component speaker assy RH) Continuity RL+ <=> (Rear speaker assy LH) Continuity RL- <=> (Rear speaker assy LH) Continuity RR+ <=> 1 (Rear speaker assy RH) Continuity RR- <=> 2 (Rear speaker assy RH) Continuity RL+ <=> 1 (Rear speaker assy No. 2 LH) ( (2) ) Continuity RL- <=> 2 (Rear speaker assy No. 2 LH) ( (2) ) Continuity RR+ <=> 1 (Rear speaker assy No. 2 RH) ( (2) ) Continuity RR- <=> 2 (Rear speaker assy No. 2 RH) ( (2) ) Continuity WFL+ <=> 1 (w/ box speaker assy LH) Continuity WFL- <=> 3 (w/ box speaker assy LH) Continuity WFR+ <=> 2 (w/ box speaker assy RH) ( (1) ) Continuity WFR- <=> 4 (w/ box speaker assy RH) ( (1) ) Continuity WFR+ <=> 1 (Stereo component speaker assy front) ( (2) ) Continuity WFR- <=> 2 (Stereo component speaker assy front) ( (2) ) Continuity (1) 9 speaker models (2) 12 speaker models Check short in harness. TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition FL+ <=> Body ground No Continuity FL- <=> Body ground No Continuity FR+ <=> Body ground No Continuity FR- <=> Body ground No Continuity ML+ <=> Body ground No Continuity ML- <=> Body ground No Continuity MR+ <=> Body ground No Continuity MR- <=> Body ground No Continuity RL+ <=> Body ground No Continuity RL- <=> Body ground No Continuity RR+ <=> Body ground No Continuity RR- <=> Body ground No Continuity WTL+ <=> Body ground No Continuity WTL- <=> Body ground No Continuity WTR+ <=> Body ground No Continuity WTR- <=> Body ground No Continuity *1: 9 speaker models *2: 12 speaker models NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSY - STEREO COMPONENT AMPLIFIER ASSY) Disconnect the radio receiver assy and stereo component amplifier assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition L+ <=> L+ Continuity L- <=> L- Continuity R+ <=> R+ Continuity R- <=> R- Continuity TX+ <=> TX+ Continuity TX- <=> TX- Continuity MUTE <=> MUTE Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition L+ <=> Body ground No Continuity L- <=> Body ground No Continuity R+ <=> Body ground No Continuity R- <=> Body ground No Continuity TX+ <=> Body ground No Continuity TX- <=> Body ground No Continuity MUTE <=> Body ground No Continuity NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
5. INSPECT FRONT NO.1 SPEAKER ASSY Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm 12 speaker models: 7-9 ohm NG: REPLACE FRONT NO.1 SPEAKER ASSY OK: Go to next step.
6. INSPECT FRONT NO.2 SPEAKER ASSY Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm 12 speaker models: 4-8 ohm NG: REPLACE FRONT NO.2 SPEAKER ASSY OK: Go to next step.
7. INSPECT STEREO COMPONENT SPEAKER ASSY Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm. 12 speaker models: 7 - 9 ohm. NG: REPLACE STEREO COMPONENT SPEAKER ASSY OK: Go to next step.
8. INSPECT REAR SPEAKER ASSY Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm. 12 speaker models: 14 - 18 ohm. NG: REPLACE REAR SPEAKER ASSY OK: Go to next step.
9. INSPECT W/ BOX SPEAKER ASSY NO.1 Resistance check. Check the resistance between the terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S21037430982006041100000) . TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition 1 <=> 3 (1) ) Constant 2 <=> 4 Constant (1) 9 speaker models NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm. 12 speaker models: 7-9 ohm NG: REPLACE W/BOX SPEAKER ASSY NO.1 OK: Go to next step.
10. INSPECT STEREO COMPONENT SPEAKER ASSY FRONT (W/12 SPEAKER MODELS) Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm. 12 speaker models: 7 - 9 ohm NG: REPLACE STEREO COMPONENT SPEAKER ASSY FRONT OK: Go to next step.
11. INSPECT REAR SPEAKER ASSY NO.2 (W/12 SPEAKER MODELS) Resistance check. Check the resistance between the terminals of the speaker. NOTE: The speaker should not be removed for checking. Standard value: 9 speaker models: 4 ohm. 12 speaker models: 7 - 9 ohm NG: REPLACE REAR SPEAKER ASSY NO.2 OK: Go to next step.
12. check and replace stereo component amplifier assy OK: SYSTEM OK NG: CHECK AND REPLACE RADIO RECEIVER ASSY

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1. INSPECT MULTI-DISPLAY CONTROLLER SUB-ASSY (R+, R-, L+, L-, SG1) Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S12346725972006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection condition Specified condition SG1 <=> Body ground Constant Continuity Check the voltage between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S32174265922006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition R+ <=> SG1 While voice sound is being produced A waveform synchronized with sound is output R- <=> SG1 While voice sound is being produced A waveform synchronized with sound is output L+ <=> SG1 While voice sound is being produced A waveform synchronized with sound is output L- <=> SG1 While voice sound is being produced A waveform synchronized with sound is output NG: CHECK AND REPLACE MULTI-DISPLAY CONTROLLER SUB-ASSY OK: Go to next step.
2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY CONTROLLER SUB-ASSY - RADIO RECEIVER ASSY) Disconnect the multi-display controller sub-assy and radio receiver assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition R+ <=> R+ Continuity R- <=> R- Continuity L+ <=> L+ Continuity L- <=> L- Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition R+ <=> Body ground No continuity R- <=> Body ground No continuity L+ <=> Body ground No continuity L- <=> Body ground No continuity NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: CHECK AND REPLACE RADIO RECEIVER ASSY

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1. INSPECT RADIO RECEIVER ASSY Disconnect the connector from the radio receiver assy. Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S40793312712006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition STSW1 - SWGND No switch is pushed Approx. 100 k ohms STSW1 - SWGND SEEK+ switch: push Approx. 0 ohms STSW1 - SWGND SEEK- switch: push Approx. 0.3 k ohms STSW1 - SWGND VOL+ switch: push Approx. 1 ohms STSW1 - SWGND VOL- switch: push Approx. 3.2 k ohms STSW2 - SWGND No switch is pushed Approx. 100 k ohms STSW2 - SWGND MODE switch: push Approx. 0 ohms OK: CHECK AND REPLACE RADIO RECEIVER ASSY NG: Go to next step.
2. INSPECT STEERING PAD SWITCH LH (AU1, AU2, EAU) Check continuity between terminals at each condition, as shown in «TESTER CONNECTION SPECIFIED CONDITION»(ref-228760-S25450784162006041100000) . Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Condition Specified condition AU1 <=> EAU No switch is pushed Approx. 100 k ohms AU1 <=> EAU SEEK+ switch: push 0 ohms AU1 <=> EAU SEEK- switch: push Approx. 0.3 k ohms AU1 <=> EAU VOL+ switch: push Approx. 1 k ohms AU1 <=> EAU VOL- switch: push Approx. 3.2 k ohms AU2 <=> EAU No switch is pushed Approx. 100 k ohms AU2 <=> EAU MODE switch: push 0 ohms NG: CHECK AND REPLACE STEERING PAD SWITCH LH OK: Go to next step.
3. CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH LH - RADIO RECEIVER ASSY) Disconnect the spiral cable sub-assy and radio receiver assy. Check continuity of harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition STSW1- <=>AU1 Continuity STSW2 <=> AU2 Continuity SWGND <=> EAU Continuity Check short in harness. Standard: TESTER CONNECTION SPECIFIED CONDITION Tester connection Specified condition STSW1 <=> Body ground No continuity STSW2 <=> Body ground No continuity SWGND <=> Body ground No continuity NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: CHECK AND REPLACE SPIRAL CABLE SUB-ASSY