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AV–64 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM AVC-LAN Circuit DESCRIPTION AV All audio system units that are connected to the AVC-LAN (communication bus) use it as the communication line by which they transmit switch signals When a +B short or GND short occurs in the AVC- LAN, the audio system fails to function normally, due to the discontinuation of communication In the AVC-LAN, the radio receiver assembly is the main communication center and has the correct resistance necessary for transmitting communication signals WIRING DIAGRAM Stereo Component Amplifier Assembly Radio Receiver Assembly TX+ S23 O IL3 O R1 TX+ TX- S23 R-W 16 IL3 R-W 15 R1 TX- E120425E01 INSPECT RADIO RECEIVER ASSEMBLY Wire Harness View: (a) Disconnect the R1 radio receiver assembly connector (b) Measure the resistance Standard R1 TXTX+ Condition Specified Condition Always 60 to 80 Ω NG I042749E01 OK Tester Connection TX+ (R1-5) - TX (R1-15) REPLACE RADIO RECEIVER ASSEMBLY AV–65 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) (a) Disconnect the R1 radio receiver assembly connector and S23 stereo component amplifier assembly connector (b) Check the resistance Standard Radio Receiver Assembly Wire Harness View: R1 TX- NG TX+ Tester Connection Specified Condition TX+ (S23-8) - TX+ (R1-15) Below Ω TX+ (S23-7) - TX- (R1-15) Below Ω TX+ (R1-5) - Body ground 10 kΩ or higher TX+ (R1-5) - Body ground 10 kΩ or higher REPAIR OR REPLACE HARNESS OR CONNECTOR Stereo Component Amplifier Assembly Wire Harness View: S23 TXTX+ I101944E04 OK REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY NG OK END REPLACE RADIO RECEIVER ASSEMBLY AV AV–66 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM Radio Receiver Power Source Circuit DESCRIPTION This circuit provides power to the radio receiver assembly AV WIRING DIAGRAM Driver Side J/B 1A W-G ACC 1J GR GR (*1) J4 ACC 11 J5 GR (*1) (*2) (*1) 11 R1 R1 ACC GR (*2) I7 Ignition Switch Radio Receiver Assembly Junction Connector L-Y AM1 37 IA1 L-Y (*2) (*1) R1 R1 B W-L 2 2 AM1 Engine Room RADIO R/B and NO J/B ALT (*2) (*1) 20 R1 R1 GND Short Pin 1 2C BR B Battery *1: Separate AMP *2: Built-in AMP ID E120415E01 AV–67 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM INSPECT RADIO RECEIVER ASSEMBLY Built-in AMP: GND (a) Check the resistance Standard: Built-in AMP R1 B ACC I045102E01 Tester Connection Condition Specified Condition GND (R1-7) - Body ground Constant Below 1Ω Standard: Separate AMP Tester Connection Condition Specified Condition GND (R1-20) - Body ground Constant Below 1Ω (b) Turn the ignition switch to the ACC position (c) Measure the voltage Standard: Built-in AMP Separate AMP: ACC B R1 GND I044826E01 Tester Connection Condition Specified Condition B (R1-4) - GND (R1-7) Constant 10 to 14 V ACC (R1-3) - GND (R1-7) Ignition switch ACC or ON 10 to 14 V Standard: Separate AMP Tester Connection Condition Specified Condition B (R1-1) - GND (R1-20) Constant Below 1Ω ACC (R1-11) - GND (R120) Ignition switch ACC or ON 10 to 14 V NG REPAIR OR REPLACE HARNESS OR CONNECTOR OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV AV–68 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM Stereo Component Amplifier Power Source Circuit DESCRIPTION This circuit provides power to the stereo component amplifier assembly AV WIRING DIAGRAM 1A Stereo Component Amplifier Assembly Junction Connector Driver Side J/B ACC 1J GR J4 J4 13 IL3 GR GR 12 S23 ACC I7 Ignition Switch W-G W-L IA4 IL3 ACC W-L W-L S24 +B W-L 10 S24 +B2 AM1 W-L W-L 2 AM1 2 Engine Room R/B and J/B 15 S24 GND RADIO NO.2 16 S24 E ALT BR BR 2C IL3 B BR Battery BB ID E120416E01 AV–69 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (a) Disconnect the S23 and S24 stereo component amplifier assembly connectors (b) Check the resistance Standard Wire Harness View: S24 S23 Tester Connection +B ACC E GND +B2I044831E02 Condition Specified Condition E (S24-16) - Body ground Always Below Ω GND (S24-15) - Body ground Always Below Ω (c) Turn the ignition switch to the ACC position (d) Measure the voltage Standard Tester Connection Condition Specified Condition B+ (S24-1) - GND (S24-15) Always 10 to 14 V +B2 (S24-10) - GND (S2415) Always 10 to 14 V ACC (S23-12) - GND (S2415) Ignition switch ACC 10 to 14 V NG REPAIR OR REPLACE HARNESS OR CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BATTERY OR BODY GROUND) OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV AUDIO / VISUAL – FRONT NO SPEAKER (for Regular Cab) AV–77 INSTALLATION HINT: • Use the same procedures for the RH and LH sides • The procedures listed below are for the LH side (b) INSTALL FRONT NO SPEAKER ASSEMBLY (a) Install the front No speaker assembly with the screws (b) Connect the connector INSTALL FRONT DOOR TRIM PANEL ASSEMBLY LH (See page ED-48) INSTALL FRONT DOOR LOWER FRAME BRACKET GARNISH LH (See page ED-49) INSTALL FRONT DOOR WINDOW REGULATOR HANDLE ASSEMBLY (See page ED-49) CONNECT CABLE TO NEGATIVE BATTERY TERMINAL Torque: 3.9 N*m (40 kgf*cm, 35 in.*lbf) (a) (a) (a) E075952E03 AV AUDIO / VISUAL – FRONT NO SPEAKER (except Regular Cab) AV–79 REMOVAL HINT: • Use the same procedures for the RH and LH sides • The procedures listed below are for the LH side (a) (b) (b) (b) (b) E075953E01 DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL REMOVE FRONT DOOR WINDOW REGULATOR HANDLE ASSEMBLY (w/o Power Door Lock) (See page ED-34) REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (w/ Power Door Lock) (See page ED-13) REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH LH (See page ED-34) REMOVE FRONT DOOR TRIM PANEL ASSEMBLY LH (See page ED-35) REMOVE FRONT NO SPEAKER ASSEMBLY (a) Disconnect the connector (b) Remove the screws and the front No speaker assembly AV AV–80 AUDIO / VISUAL – FRONT NO SPEAKER (except Regular Cab) INSTALLATION HINT: • Use the same procedures for the RH and LH sides • The procedures listed below are for the LH side AV (b) (a) INSTALL FRONT NO SPEAKER ASSEMBLY (a) Install the front No speaker assembly with the screws (b) Connect the connector INSTALL FRONT DOOR TRIM PANEL ASSEMBLY LH (See page ED-48) INSTALL FRONT DOOR LOWER FRAME BRACKET GARNISH LH (See page ED-49) INSTALL POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (w/ Power Door Lock) (See page ED-30) INSTALL FRONT DOOR WINDOW REGULATOR HANDLE ASSEMBLY (w/o Power Door Lock) (See page ED-49) CONNECT CABLE TO NEGATIVE BATTERY TERMINAL Torque: 3.9 N*m (40 kgf*cm, 35 in.*lbf) (a) (a) (a) E075953E02 AUDIO / VISUAL – FRONT NO SPEAKER AV–83 REMOVAL HINT: • Use the same procedures for the RH and LH sides • The procedures listed below are for the LH side (b) DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL REMOVE FRONT DOOR WINDOW REGULATOR HANDLE ASSEMBLY (w/o Power Door Lock) (See page ED-34) REMOVE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (w/ Power Door Lock) (See page ED-13) REMOVE FRONT DOOR LOWER FRAME BRACKET GARNISH LH (See page ED-34) REMOVE FRONT DOOR TRIM PANEL ASSEMBLY LH (See page ED-35) REMOVE FRONT NO SPEAKER ASSEMBLY (a) Disconnect the connector (b) Remove the bolts (b) (a) E075954E01 (c) Disengage the claw and remove the front No speaker assembly E075955 AV AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM AV–49 Speaker Circuit DESCRIPTION Sound signals that have been amplified by the stereo component amplifier or radio receiver assembly (built-in amp) are sent to the speakers from the stereo component amplifier assembly or radio receiver assembly through this circuit If there is a short in this circuit, the stereo component amplifier assembly detects it and stops the output to the speakers Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers AV AV–50 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM WIRING DIAGRAM Built-in AMP: AV Radio Receiver Assembly P (*1) S15 Front No Speaker Assembly LH LG (*2) P (*1) + + LG (*2) (*2) (*1) 12 IC2 IC1 P R1 FL+ S19 Front No Speaker Assembly S16 Front No Speaker Assembly RH V (*1) L (*2) - LG + - V (*1) L (*2) 11 IC2 IC1 LG + IK2 IK1 S20 Front No Speaker Assembly V LG R1 FL- R1 FR+ L S17 R (*3) Rear Speaker Assembly RH B (*4) - - BF1 BA1 IK2 IK1 L B 11 IE1 L B R1 FR- R2 RL+ Y (*4) 10 BF1 BA1 Y IE1 Y R2 RL- W (*3) S18 Rear Speaker Assembly LH R BG1 BB1 R IL2 R R2 RR+ W IL2 W R2 RR- W 10 BG1 BB1 (*4) (*3) *1 : w/ Door Lock Control *2 : w/o Door Lock Control *3 : Double Cab *4 : Access Cab E120422E01 AV–51 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM Separate AMP: Stereo Component Amplifier Assembly S19 Front No Speaker Assembly LH S15 Front No Speaker Assembly LH P V 1 + + - - P V 12 P IC1 11 V IC1 18 IL3 17 IL3 P S24 FL+ V 17 S24 FL- S24 FR+ AV S20 Front No Speaker Assembly RH S16 Front No Speaker Assembly RH S17 Rear Speaker Assembly LH S18 Rear Speaker Assembly RH LG L 1 + - - L BA1 B W 10 BA1 Y IK1 IK1 11 IE1 LG IL3 LG L IL3 L B 11 IL3 B S24 RL+ Y 13 S24 RL- Y IE1 10 IL3 18 S24 FR- R BB1 R S24 RR+ W 10 BB1 W 14 S24 RR- BR S24 WFL+ G-W 11 S24 WFL- L-B S24 WFR+ L-R 12 S24 WFR- LG R + WF+ WFS21 Woofer WF+ WF- E120423E01 AV–52 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM SYSTEM CHECK (a) Check the system (1) Check whether the stereo component amplifier assembly is a built-in type or a separate type AV Amplifier Type Proceed To Built-in AMP A Separate AMP B B A Go to step AV–53 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPEAKER ASSEMBLY) (a) Disconnect the R2 and R1 radio receiver assembly connectors (b) Disconnect the speaker connectors (c) Check the resistance Standard RLFR- FL- RR- R2 RR+ R1 RL+ FL+ FR+ Connector Front View: (Front No Speaker Assembly) (Rear Speaker Assembly) S15 Tester Connection Specified Condition FL+ (R1-2) - S19-4 Below 1Ω FL- (R1-6) - S19-3 Below 1Ω FR+ (R1-1) - S20-4 Below 1Ω FR- (R1-5) - S20-3 Below 1Ω S19-1 - S15-2 Below 1Ω S19-2 - S15-1 Below 1Ω S20-1 - S16-2 Below 1Ω S20-2 - S16-1 Below 1Ω RL+ (R2-2) - S17-1 Below 1Ω RL- (R2-6) - S17-2 Below 1Ω RR+ (R2-1) - S18-1 Below 1Ω RR- (R2-3) - S18-2 Below 1Ω FL+ (R1-2) - Body ground 10 kΩ or higher S16 FL- (R1-6) - Body ground 10 kΩ or higher S17 FR+ (R1-1) - Body ground 10 kΩ or higher S18 Connector Front View: (Front No Speaker Assembly) NG FR- (R1-5) - Body ground 10 kΩ or higher RL+ (R2-2) - Body ground 10 kΩ or higher RL- (R2-6) - Body ground 10 kΩ or higher RR+ (R2-1) - Body ground 10 kΩ or higher RR- (R2-3) - Body ground 10 kΩ or higher REPAIR OR REPLACE HARNESS OR CONNECTOR S19 S20 I101945E02 OK INSPECT FRONT NO SPEAKER ASSEMBLY (a) Measure the resistance between the terminals of the speaker NOTICE: The speaker should not be removed for checking Standard: Approximately Ω AV AV–54 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM NG REPLACE FRONT NO SPEAKER ASSEMBLY OK AV INSPECT FRONT NO SPEAKER ASSEMBLY (a) Check that the malfunction disappears when another speaker in good condition is installed OK: The malfunction disappears HINT: • Connect all the connectors to the speakers • When there is a possibility that either the left or right front speaker is defective, inspect by interchanging the left one and the right one NG REPLACE FRONT NO SPEAKER ASSEMBLY OK INSPECT REAR SPEAKER ASSEMBLY (a) Measure the resistance between the terminals of the speaker NOTICE: The speaker should not be removed for checking Standard: Approximately Ω NG REPLACE REAR SPEAKER ASSEMBLY OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV–55 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY SPEAKER ASSEMBLY) (a) Disconnect the S24 connectors from the stereo component amplifier assembly and speakers (b) Measure the resistance Standard RR+ FR+ FL+ RL+ Tester Connection WFR+ WFL+ S24 FRFL- WFL- WFRRR- RLConnector Front View: (Front No Speaker Assembly) (Rear Speaker Assembly) Below 1Ω Below 1Ω FR+ (S24-7) - S20-4 Below 1Ω FR- (S24-18) - S20-3 Below 1Ω S19-1 - S15-2 Below 1Ω S19-2 - S15-1 Below 1Ω S20-1 - S16-2 Below 1Ω S20-2 - S16-1 Below 1Ω RL+ (S24-4) - S17-1 Below 1Ω RL- (S24-13) - S17-2 Below 1Ω RR+ (S24-5) - S18-1 Below 1Ω RR- (S24-14) - S18-2 Below 1Ω FL+ (S24-6) - Body ground 10 kΩ or higher S16 FL- (S24-17) - Body ground 10 kΩ or higher S17 S18 S19 S20 FR+ (S24-7) - Body ground 10 kΩ or higher FR- (S24-18) - Body ground 10 kΩ or higher RL+ (S24-4) - Body ground 10 kΩ or higher RL- (S24-12) - Body ground 10 kΩ or higher RR+ (S24-5) - Body ground 10 kΩ or higher RR- (S24-14) - Body ground 10 kΩ or higher WFL+ (S24-2) - Body ground 10 kΩ or higher WFL- (S24-11) - Body ground 10 kΩ or higher WFR+ (S24-3) - Body ground 10 kΩ or higher WFR- (S24-12) - Body ground 10 kΩ or higher NG Connector Front View: (Woofer) FL+ (S24-6) - S19-4 FL- (S24-17) - S19-3 S15 Connector Front View: (Front No Speaker Assembly) Specified Condition S21 I101946E02 REPAIR OR REPLACE HARNESS AND CONNECTOR AV AV–56 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM OK INSPECT FRONT NO SPEAKER ASSEMBLY (a) Measure the resistance between the terminals of the speaker NOTICE: The speaker should not be removed for checking Standard: Approximately Ω AV NG REPLACE FRONT NO SPEAKER ASSEMBLY OK INSPECT FRONT NO SPEAKER ASSEMBLY (a) Check that the malfunction disappears when another speaker in good condition is installed OK: The malfunction disappears HINT: • Connect all the connectors to the speakers • When there is a possibility that either the left or right front speaker is defective, inspect by interchanging the left one and the right one NG REPLACE FRONT NO SPEAKER ASSEMBLY OK INSPECT REAR SPEAKER ASSEMBLY (a) Measure the resistance between the terminals of the speaker NOTICE: The speaker should not be removed for checking Standard: Approximately Ω NG OK REPLACE REAR SPEAKER ASSEMBLY AV–57 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM 10 INSPECT NO SPEAKER ASSEMBLY WITH BOX (a) Measure the resistance NOTICE: The speaker should not be removed for checking Standard Woofer: I040660E01 NG Tester Connection Specified Condition 1-3 2Ω 2-4 2Ω REPLACE NO SPEAKER ASSEMBLY WITH BOX OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV AV–58 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM AMP Mute Signal Circuit (from Radio Receiver Assembly) DESCRIPTION AV This circuit sends a signal to the stereo component amplifier to mute the noise Because of that, the noise produced while changing the sound source ceases If there is an open in the circuit, noise can be heard from the speaker when changing the sound source If there is a short in the circuit, even though the stereo component amplifier assembly is normal, no sound or only extremely quiet sound is produced WIRING DIAGRAM Stereo Component Amplifier Assembly MUTE S23 Radio Receiver Assembly 12 V R1 MUTE V IL3 I045106E01 INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (a) Measure the voltage Standard Wire Harness View: S23 Tester Connection MUTE (S23-1) - Body ground OK MUTE I045104E01 NG Condition Turn ignition switch to ACC, Audio system is playing → Changing Specified Condition Above 3.5 V → Below V PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV–59 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) (a) Disconnect the R1 radio receiver assembly connector and S23 stereo component amplifier assembly connector (b) Check the resistance Standard Radio Receiver Assembly Wire Harness View: Tester Connection R1 Condition Specified Condition MUTE (R1-7) - MUTE (S23-1) Always Below 1Ω MUTE (R1-7) - Body ground Always 10 kΩ or higher NG MUTE REPAIR OR REPLACE HARNESS OR CONNECTOR Stereo Component Amplifier Assembly Wire Harness View: S23 MUTE I101944E02 OK INSPECT RADIO RECEIVER ASSEMBLY (a) Reconnect the R1 stereo component amplifier assembly connector (b) Turn the ignition switch to the ACC position (c) Measure the voltage Standard Wire Harness View: R1 Tester Connection MUTE (R1-7) - Body ground Condition Specified Condition Turn ignition switch to ACC 3.5 V or higher MUTE I045113E01 OK REPLACE RADIO RECEIVER ASSEMBLY NG REPAIR OR REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY AV AV–60 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM AMP Sound Signal Circuit DESCRIPTION AV The radio receiver assembly sends sound signals to the stereo component amplifier assembly through this circuit Sound signals that have been sent are amplified by the stereo component amplifier assembly, and then sent to the speakers If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers WIRING DIAGRAM Stereo Component Amplifier Assembly Radio Receiver Assembly R+ S23 B IL3 B R1 R+ L+ S23 R IL3 R R1 L+ R- S23 W 15 IL3 W 18 R1 R- S23 G 14 IL3 G 19 R1 L- L- SGND S23 (Shielded) IL3 (Shielded) 10 R1 SGND E120424E01 AV–61 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) (a) Disconnect the R1 radio receiver assembly connector and S23 stereo component amplifier assembly connector (b) Check the resistance Standard Radio Receiver Assembly Wire Harness View: R1 RR+ LL+ Stereo Component Amplifier Assembly Wire Harness View: NG Tester Connection Specified Condition L+ (S23-3) - L+ (R1-9) Below Ω L- (S23-2) - L- (R1-19) Below Ω R+ (S23-5) - R+ (R1-8) Below Ω R- (S23-4) - R- (R1-18) Below Ω L+ (S23-3) - Body ground 10 kΩ or higher L- (S23-2) - Body ground 10 kΩ or higher R+ (S23-5) - Body ground 10 kΩ or higher R- (S23-4) - Body ground 10 kΩ or higher REPAIR OR REPLACE HARNESS OR CONNECTOR S23 R+ R- L+ LI101944E03 OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV AV–62 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier DESCRIPTION AV The radio receiver assembly sends sound signals to the stereo component amplifier assembly through this circuit Sound signals that have been sent are amplified by the stereo component amplifier assembly, and then sent to the speakers If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers WIRING DIAGRAM Stereo Component Amplifier Assembly Radio Receiver Assmbly R+ S23 B IL3 B R1 R+ L+ S23 R IL3 R R1 L+ R- S23 W 15 IL3 W 18 R1 R- L- S23 G 14 IL3 G 19 R1 L- S23 SGND (Shielded) IL3 (Shielded) 10 R1 SGND I045105E01 AV–63 AUDIO / VISUAL – AUDIO AND VISUAL SYSTEM CHECK HARNESS AND CONNECTOR (a) Disconnect the R1 radio receiver assembly connector and S23 stereo component amplifier assembly connector (b) Check the resistance Standard resistance Radio Receiver Assembly Wire Harness View: R1 RR+ LL+ Stereo Component Amplifier Assembly Wire Harness View: NG Tester Connection Specified Condition L+ (S23-3) - L+ (R1-9) Below Ω L- (S23-2) - L- (R1-19) Below Ω R+ (S23-5) - R+ (R1-8) Below Ω R- (S23-4) - R- (R1-18) Below Ω L+ (S23-3) - Body ground 10 kΩ or higher L- (S23-2) - Body ground 10 kΩ or higher R+ (S23-5) - Body ground 10 kΩ or higher R- (S23-4) - Body ground 10 kΩ or higher REPAIR OR REPLACE HARNESS OR CONNECTOR S23 R+ R- L+ LI101944E03 OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE AV