DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-21 | Malfunction exists in ROM. | Multi-display |
| 01-22 | Malfunction exists in RAM. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-D5*1, *3 | When either condition below is met: Component shown by sub-code is (was) disconnected from system when turning power switch ON (ACC or IG). Communication condition with device that code shows cannot be obtained when hybrid system starts. | Power source circuit of component shown by sub-code AVC-LAN circuit between multi-display and component shown by sub-code Component shown by sub-code |
| 01-D8*2, *3 | Component shown by sub-code is (was) disconnected from system after hybrid system starts. | |
| 01-D9*1, *3 | Device that had functioned before hybrid system stopped is (was) disconnected from system when power switch is (was) ON (IG or ACC). | |
| 01-DA*3 | When either condition below is met: No response is identified when changing mode. Sound and image do not change by switch operation. | |
| 01-DB*1, *3 | Dual alarm is detected. | |
| 01-DE*3 | Slave device has been disconnected after hybrid system starts. |
HINT
- *1: Even if no fault is present, this trouble code may be stored depending on the battery condition or hybrid system start voltage.
- *2: If the power connector is disconnected after the hybrid system starts, this code is stored after 180 seconds.
- *3: If it is reported that the device does not exist during verification, check the power source circuit and AVC-LAN circuit for the device.
Note. Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-D6*1 | When either of the following conditions is met: The component which has stored the code has (had) been disconnected when the power switch is ON (ACC or IG). The master device has (had) been disconnected when this code is stored. | Multi-display power source circuit Power source circuit of the component which has stored this code AVC-LAN circuit between the multi-display and the component which has stored this code Component which has stored this code Multi-display |
| 01-D7*2 | When either of the following conditions is met: The component which has stored the code has (had) been disconnected after the hybrid system starts (started). The master device has (had) been disconnected when this code is (was) stored. |
HINT
- *1: Even if no fault is present, this trouble code may be stored depending on the battery condition or hybrid system start voltage.
- *2: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the power switch ON (ACC or IG), this code is stored.
Note. Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-DC | Transmission to component shown by sub-code failed. (Detecting this DTC does not always mean actual failure.) | If same sub-code is recorded in other components, check harness for power supply and communication system of all components shown by code |
Note. The multi-display is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-DD | Device that should be master has been disconnected after hybrid system starts. | Multi-display power source circuit AVC-LAN circuit between multi-display and component which has stored this code Multi-display Component which has stored this code |
| 01-E1* | Amplifier device records that amplifier output does not function even while source device is operating. |
HINT
*: Even if no fault is present, this trouble code may be stored depending on the battery condition or hybrid system start voltage.
Note. Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-DF* | When either condition below is met: Device with a display fails and master is switched to the audio device. Communication error between sub-master (radio receiver) and master occurs. | Multi-display power source circuit AVC-LAN circuit between multi-display and component which has stored this code AVC-LAN circuit between multi-display and radio receiver Multi-display Component which has stored this code |
HINT
*: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the power switch ON (ACC or IG), this code is stored.
Note. Before starting the troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs. The multi-display is the master unit. Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-E0 | "Registration complete" signal from master device cannot be received. | |
| 01-E3 | Registration demand signal from the slave device is output. Or registration demand signal is output by receiving connection confirmation signal from sub-master device. | |
| 01-E4 | Multiple frame transmission is incomplete. |
HINT
Even if no fault is present, this trouble code may be stored depending on the battery condition or hybrid system start voltage.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 01-E2 | Signal for ON / OFF control from master device has problem. | Multi-display |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 21-10 | Panel switch detection circuit has a problem. | Multi-display |
| 21-11 | Touch panel switch has a problem. | |
| 23-10 | Panel switch detection circuit has a problem. | |
| 23-11 | Touch panel switch has a problem. | |
| 24-10 | Panel switch detection circuit has a problem. | |
| 24-11 | Touch panel switch has a problem. | |
| 25-10 | Panel switch detection circuit has a problem. | |
| 25-11 | Touch panel switch has a problem. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 34-10 | Error in power supply system for picture circuit | Multi-display |
| 34-11 | Decline in power output from inverter circuit for back-light | |
| 34-12 | Excess power output from inverter circuit for back-light |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-10 | Mechanical error in DVD changer is detected while DVD is not being inserted or ejected. | Radio receiver |
| 45-11 | Disc insertion or ejection is failed. | |
| 45-12 | Disc read problem occurs. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-41 | An unsuitable disc is inserted. | Disc Radio receiver |
| 45-42 | The disc cannot be read. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-43 | DVD operation is abnormal. | Disc Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-44 | Operation error in DVD changer mechanism. | Radio receiver |
| 45-48 | Excess current is present in DVD changer. | |
| 45-50 | Malfunction in insertion/ejection system. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-45 | Disc cannot be ejected. | Radio receiver |
| 45-51 | Mechanical error occurs during elevator operation. | |
| 45-52 | Error occurs in DVD changer clamp. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-46 | Scratches or dirt is found on disc surface or disc is inserted upside down. | Disc Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-47 | Sensor detects that DVD unit temperature is high. (Over 80°C (176°F)) | Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-78 | An error occurs during the decode process (MP3 / WMA). | Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 45-7D | Incompatible MP3 or WMA file is used. Although the file has an extension of ".mp3" or ".wma", the header information cannot be read. | Disc Radio receiver |
| 45-7E | Disc with no music data is used. Playable files are not on the disc (MP3 or WMA). | |
| 45-7F | Copy-protected file, which cannot be played, is used. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 57-47 | When one of following conditions is met: Bluetooth module is not installed Problem with Bluetooth module Problem in communication line to Bluetooth module | Multi-display |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 5C-40 | Synchronous signal from the camera cannot be transmitted. | Wire harness Television camera Multi-display |
Scheme 169
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 60-10 | AM tuner PLL (phase locked loop) synchronization is impossible. | Radio receiver |
| 60-11 | FM tuner PLL (phase locked loop) synchronization is impossible. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 60-42 | The power source of the tuner is abnormal. | Radio receiver |
| 60-43 | The AM tuner is abnormal. | |
| 60-44 | The FM tuner is abnormal. | |
| 60-50 | A problem occurs in the IC inside the tuner unit and radio reception is not normal. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-10 | Mechanical error in CD changer is detected while CD is not being inserted or ejected. | Radio receiver |
| 63-11 | CD insertion or ejection is failed. | |
| 63-12 | CD read problem occurs. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-41 | An unsuitable disc is inserted. | CD Radio receiver |
| 63-42 | The disc cannot be read. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-43 | CD operation is abnormal. | CD Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-44 | Operation error in the CD mechanism. | Radio receiver |
| 63-48 | Excess current is present in the CD changer. | |
| 63-50 | Malfunction in insertion/ejection system. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-45 | Magazine cannot be ejected. | Radio receiver |
| 63-51 | Mechanical error occurs during elevator operation. | |
| 63-52 | Error occurs in CD changer clamp. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-46 | Scratches or dirt is found on CD surface or CD is inserted upside down. | CD Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-47 | Sensor detects that CD unit temperature is high. (Over 80°C (176°F)) | Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-78 | An error occurs during the decode process (MP3 / WMA). | Radio receiver |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 63-7D | Incompatible MP3 or WMA file is used. Although the file has an extension of ".mp3" or ".wma", the header information cannot be read. | CD Radio receiver |
| 63-7E | Disc with no music data is used. Playable files are not on the disc (MP3 or WMA). | |
| 63-7F | Copy-protected file, which cannot be played, is used. |
The speaker circuit has a fail-safe function. When a short in the circuit is detected, all sound outputs are stopped.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 74-40 | Short is detected in speaker output circuit. | Wire harness Speaker Stereo component amplifier |
Scheme 170
Scheme 171
Scheme 172
Scheme 173
This circuit sends an operation signal from the steering pad switch to the radio receiver.
If there is an open in the circuit, the audio system cannot be operated using the steering pad switch.
If there is a short in the circuit, the resulting condition is the same as if the switch were continuously depressed. Therefore, the audio system cannot be operated using the steering pad switch, and the audio system itself cannot function.
Scheme 174
Power is supplied to the multi-display and steering pad switch illumination when the light control switch is in the TAIL or HEAD position.
Scheme 175
This circuit is from the parking brake switch to the multi-display.
Scheme 176
Scheme 177
Scheme 178
Scheme 179
- CHECK BRAKE WARNING LIGHT Check that the brake warning light comes on when the parking brake is applied and goes off when it is released. OK The brake warning light operates as specified above. OK --> See step 3 NG: Go to next step
- INSPECT PARKING BRAKE SWITCH Remove the parking brake switch. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition Switch connector - Switch body Shaft is not pressed Below 1 ohms Switch connector - Switch body Shaft is pressed 10 kohms or higher NG --> REPLACE PARKING BRAKE SWITCH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - PARKING BRAKE SWITCH) Disconnect the K46 display connector. Disconnect the A31 switch connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K46-23 (PKB) - A31-1 Below 1 ohms K46-23 (PKB) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
The stereo component amplifier sends sound signals to the speaker.
Scheme 180
Scheme 181
Scheme 182
Scheme 183
Scheme 184
Scheme 185
Scheme 186
Scheme 187
Scheme 188
Scheme 189
- CHECK AUDIO MODELS Check the audio model. RESULT Model Proceed to CD changer models A DVD changer models B B --> See step 20 A: Go to next step
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Malfunction in front speaker area A Malfunction in rear speaker area B B --> See step 13 A: Go to next step
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Front stereo component speaker A Front No. 2 speaker B Front No. 1 speaker C C --> See step 11 B --> See step 6 A: Go to next step
- INSPECT FRONT STEREO COMPONENT SPEAKER Disconnect the L2 speaker connector. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 Approx. 10 ohms NG --> REPLACE FRONT STEREO COMPONENT SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) Disconnect the L2 speaker connector. Disconnect the U44 amplifier connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U44-3 (CTR+) - L2-1 Below 1 ohms U44-9 (CTR-) - L2-2 Below 1 ohms U44-3 (CTR+) - Body ground 10 kohms or higher U44-9 (CTR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT FRONT NO. 2 SPEAKER Disconnect the K23 and K62 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition K23-1 (TWL+) - K23-2 (TWL-) Approx. 4 ohms K62-1 (TWR+) - K62-2 (TWR-) Approx. 4 ohms NG --> REPLACE FRONT NO. 2 SPEAKER OK: Go to next step
- CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System. RESULT Defective speaker location Specified Condition Defective speaker is on right side (with LEXUS Link System) A Defective speaker is on right side (without LEXUS Link System) B Defective speaker is on left side (with LEXUS Link System) B B --> See step 10 A: Go to next step
- CHECK WIRE HARNESS (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) Disconnect the U30 amplifier connector. Disconnect the K62 speaker connector. Disconnect the U45 ECU connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K62-1 (TWR+) - U45-2 (SPO+) Below 1 ohms K62-2 (TWR-) - U45-3 (SPO-) Below 1 ohms U30-8 (FR+) - U45-10 (SPI+) Below 1 ohms U30-7 (FR-) - U45-11 (SPI-) Below 1 ohms K62-1 (TWR+) - Body ground 10 kohms or higher K62-2 (TWR-) - Body ground 10 kohms or higher U30-8 (FR+) - Body ground 10 kohms or higher U30-7 (FR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK STEREO COMPONENT AMPLIFIER (OPERATION) After replacing the stereo component amplifier with a normal one, check that audio sound can be heard from the front RH side speaker. OK Audio sound can be heard. NG --> REPLACE MAYDAY ECU OK --> END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) Disconnect the U30 amplifier connector. Disconnect the K23 and K62 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U30-2 (FL+) - K23-1 (TWL+) Below 1 ohms U30-6 (FL-) - K23-2 (TWL-) Below 1 ohms U30-8 (FR+) - K62-1 (TWR+) Below 1 ohms U30-7 (FR-) - K62-2 (TWR-) Below 1 ohms U30-2 (FL+) - Body ground 10 kohms or higher U30-6 (FL-) - Body ground 10 kohms or higher U30-8 (FR+) - Body ground 10 kohms or higher U30-7 (FR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT FRONT NO. 1 SPEAKER Disconnect the M7 and M1 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 Approx. 4 ohms NG --> REPLACE FRONT NO. 1 SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (FRONT NO. 2 SPEAKER - FRONT NO. 1 SPEAKER) Disconnect the K23, K62, M7 and M1 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K23-3 (+) - M7-1 Below 1 ohms K23-4 (-) - M7-2 Below 1 ohms K62-3 (+) - M1-1 Below 1 ohms K62-4 (-) - M1-2 Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE FRONT NO. 2 SPEAKER
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Rear No. 2 speaker A Rear No. 1 speaker B Stereo component speaker C C --> See step 18 B --> See step 16 A: Go to next step
- INSPECT REAR NO. 2 SPEAKER Disconnect the S8 and S4 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 (+TW) - 2 (-TW) Approx. 4 ohms NG --> REPLACE REAR NO. 2 SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER) Disconnect the U30 amplifier connector. Disconnect the S8 and S4 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U30-3 (RL+) - S8-1 (+TW) Below 1 ohms U30-9 (RL-) - S8-2 (-TW) Below 1 ohms U30-4 (RR+) - S4-1 (+TW) Below 1 ohms U30-10 (RR-) - S4-2 (-TW) Below 1 ohms U30-3 (RL+) - Body ground 10 kohms or higher U30-9 (RL-) - Body ground 10 kohms or higher U30-4 (RR+) - Body ground 10 kohms or higher U30-10 (RR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT REAR NO. 1 SPEAKER Disconnect the O1 and O6 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 Approx. 4 ohms NG --> REPLACE REAR NO. 1 SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (REAR NO. 2 SPEAKER - REAR NO. 1 SPEAKER) Disconnect the S8, S4, O1 and O6 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition S8-3 (+) - O6-1 Below 1 ohms S8-4 (-) - O6-2 Below 1 ohms S4-3 (+) - O1-1 Below 1 ohms S4-4 (-) - O1-2 Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE REAR NO. 2 SPEAKER
- INSPECT STEREO COMPONENT SPEAKER Disconnect the U21 speaker connector. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 (WF2-) - 2 (WF2+) Approx. 2.5 ohms 3 (WF1-) - 4 (WF1+) NG --> REPLACE STEREO COMPONENT SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - STEREO COMPONENT SPEAKER) Disconnect the U44 amplifier connector. Disconnect the U21 speaker connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U44-1 (WF1+) - U21-4 (WF1+) Below 1 ohms U44-5 (WF1-) - U21-3 (WF1-) Below 1 ohms U44-2 (WF2+) - U21-2 (WF2+) Below 1 ohms U44-6 (WF2-) - U21-1 (WF2-) Below 1 ohms U44-1 (WF1+) - Body ground 10 kohms or higher U44-5 (WF1-) - Body ground 10 kohms or higher U44-2 (WF2+) - Body ground 10 kohms or higher U44-6 (WF2-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Malfunction in front speaker area A Malfunction in rear speaker area B B --> See step 31 A: Go to next step
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Front stereo component speaker A Front No. 2 speaker B Front No. 1 speaker C C --> See step 29 B --> See step 24 A: Go to next step
- INSPECT FRONT STEREO COMPONENT SPEAKER Disconnect the L2 speaker connector. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 7 to 9 ohms NG --> REPLACE FRONT STEREO COMPONENT SPEAKER OK: Go to next step
- CHECK SPEAKER (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) Disconnect the L2 speaker connector. Disconnect the U31 amplifier connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U31-3 (CTR+) - L2-1 Below 1 ohms U31-12 (CTR-) - L2-2 Below 1 ohms U31-3 (CTR+) - Body ground 10 kohms or higher U31-12 (CTR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT FRONT NO. 2 SPEAKER Disconnect the K23 and K62 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition K23-1 (TWL+) - K23-2 (TWL-) 6 to 10 ohms K62-1 (TWR+) - K62-2 (TWR-) 6 to 10 ohms NG --> REPLACE FRONT NO. 2 SPEAKER OK: Go to next step
- CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System. RESULT Defective speaker location Specified Condition Defective speaker is on right side (with LEXUS Link System) A Defective speaker is on right side (without LEXUS Link System) B Defective speaker is on left side (with LEXUS Link System) B B --> See step 28 A: Go to next step
- CHECK WIRE HARNESS (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) Disconnect the U31 amplifier connector. Disconnect the K62 speaker connector. Disconnect the U45 ECU connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K62-1 (TWR+) - U45-2 (SPO+) Below 1 ohms K62-2 (TWR-) - U45-3 (SPO-) Below 1 ohms U31-9 (FR+) - U45-10 (SPI+) Below 1 ohms U31-20 (FR-) - U45-11 (SPI-) Below 1 ohms K62-1 (TWR+) - Body ground 10 kohms or higher K62-2 (TWR-) - Body ground 10 kohms or higher U31-9 (FR+) - Body ground 10 kohms or higher U31-20 (FR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK STEREO COMPONENT AMPLIFIER (OPERATION) After replacing the stereo component amplifier with a normal one, check that audio sound can be heard from the front RH side speaker. OK Audio sound can be heard. NG --> REPLACE MAYDAY ECU OK --> END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE)
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) Disconnect the U31 amplifier connector. Disconnect the K23 and K62 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U31-8 (FL+) - K23-1 (TWL+) Below 1 ohms U31-19 (FL-) - K23-2 (TWL-) Below 1 ohms U31-9 (FR+) - K62-1 (TWR+) Below 1 ohms U31-20 (FR-) - K62-2 (TWR-) Below 1 ohms U31-8 (FL+) - Body ground 10 kohms or higher U31-19 (FL-) - Body ground 10 kohms or higher U31-9 (FR+) - Body ground 10 kohms or higher U31-20 (FR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT FRONT NO. 1 SPEAKER Disconnect the M8 and M2 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 6 to 10 ohms NG --> REPLACE FRONT NO. 1 SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER) Disconnect the U30 amplifier connector. Disconnect the M8 and M2 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U30-3 (WFL+) - M8-1 Below 1 ohms U30-9 (WFL-) - M8-2 Below 1 ohms U30-4 (WFR+) - M2-1 Below 1 ohms U30-10 (WFR-) - M2-2 Below 1 ohms U30-3 (WFL+) - Body ground 10 kohms or higher U30-9 (WFL-) - Body ground 10 kohms or higher U30-4 (WFR+) - Body ground 10 kohms or higher U30-10 (WFR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- CHECK SPEAKER Check the malfunctioning speakers. RESULT Result Proceed to Rear No. 2 speaker A Rear No. 1 speaker B Rear header speaker C Stereo component speaker D D --> See step 38 C --> See step 36 B --> See step 34 A: Go to next step
- INSPECT REAR NO. 2 SPEAKER Check that the malfunction disappears when the speaker is replaced with a normal one. OK Malfunction disappears. HINT: Connect all the connectors to the rear No. 2 speakers. When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one. Perform the inspection above on both LH and RH sides. OK --> REPLACE REAR NO. 2 SPEAKER NG: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER) Disconnect the U31 amplifier connector. Disconnect the S8 and S4 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U31-6 (RL+) - S8-1 (+TW) Below 1 ohms U31-17 (RL-) - S8-2 (-TW) Below 1 ohms U31-7 (RR+) - S4-1 (+TW) Below 1 ohms U31-18 (RR-) - S4-2 (-TW) Below 1 ohms U31-6 (RL+) - Body ground 10 kohms or higher U31-17 (RL-) - Body ground 10 kohms or higher U31-7 (RR+) - Body ground 10 kohms or higher U31-18 (RR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT REAR NO. 1 SPEAKER Disconnect the O6 and O1 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 6 to 10 ohms NG --> REPLACE REAR NO. 1 SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (REAR NO. 2 SPEAKER - REAR NO. 1 SPEAKER) Disconnect the O6, O1, S8 and S4 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition S8-3 (+) - O6-1 Below 1 ohms S8-4 (-) - O6-2 Below 1 ohms S4-3 (+) - O1-1 Below 1 ohms S4-4 (-) - O1-2 Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE REAR NO. 2 SPEAKER
- INSPECT REAR HEADER SPEAKER Disconnect the V21 and U17 speaker connectors. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 1 - 2 7 to 9 ohms NG --> REPLACE REAR HEADER SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR HEADER SPEAKER) Disconnect the U30 amplifier connector. Disconnect the V21 and U17 speaker connectors. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U30-1 (SL+) - V21-1 Below 1 ohms U30-5 (SL-) - V21-2 Below 1 ohms U30-2 (SR+) - U17-1 Below 1 ohms U30-6 (SR-) - U17-2 Below 1 ohms U30-1 (SL+) - Body ground 10 kohms or higher U30-5 (SL-) - Body ground 10 kohms or higher U30-2 (SR+) - Body ground 10 kohms or higher U30-6 (SR-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
- INSPECT STEREO COMPONENT SPEAKER Disconnect the U21 speaker connector. Measure the resistance of the speaker. Standard resistance Tester Connection Specified Condition 2 (WF2+) - 4 (WF1+) 12.5 to 16.5 ohms NG --> REPLACE STEREO COMPONENT SPEAKER OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - STEREO COMPONENT SPEAKER) Disconnect the U31 amplifier connector. Disconnect the U21 speaker connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U31-5 (WF1+) - U21-4 (WF1+) Below 1 ohms U31-4 (WF2+) - U21-2 (WF2+) Below 1 ohms U31-5 (WF1+) - Body ground 10 kohms or higher U31-4 (WF2+) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE STEREO COMPONENT AMPLIFIER
The circuit sends a sound signal from the radio receiver to the stereo component amplifier.
Scheme 190
Scheme 191
- CHECK WIRE HARNESS (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the K54 receiver connector. Disconnect the U29 amplifier connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U29-3 (L+) - K54-9 (L+) Below 1 ohms U29-2 (L-) - K54-19 (L-) Below 1 ohms U29-5 (R+) - K54-8 (R+) Below 1 ohms U29-4 (R-) - K54-18 (R+) Below 1 ohms U29-3 (L+) - Body ground 10 kohms or higher U29-2 (L-) - Body ground 10 kohms or higher U29-5 (R+) - Body ground 10 kohms or higher U29-4 (R-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
The stereo jack adapter sends an external device sound signal to the radio receiver through this circuit.
The sound signal that has been sent is amplified by the stereo component amplifier, and then is 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, radio receiver, or speakers.
HINT
For models with a DVD changer, the sound signal circuit consists of a stereo jack adapter, sub wire harness, and radio receiver. Since the sub wire harness is supplied as part of the radio receiver assembly, if there are any problems with the sub wire harness, repair the harness or replace the radio receiver assembly. Because the sub wire harness is not supplied separately, the sub wire harness inspection procedure is not shown in this service information.
Scheme 192
Scheme 193
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO JACK ADAPTER) Disconnect the connectors from the stereo jack adapter and radio receiver. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified condition U48-4 (AUXO) - K56-19 (AUXI) Below 1 ohms U48-3 (ASGN) - K56-16 (ASGN) Below 1 ohms U48-2 (ARO) - K56-15 (ARI) Below 1 ohms U48-1 (ALO) - K56-17 (ALI) Below 1 ohms U48-5 (AGND) - K56-18 (AGND) Below 1 ohms U48-4 (AUXO) - Body ground 10 kohms or higher U48-3 (ASGN) - Body ground 10 kohms or higher U48-2 (ARO) - Body ground 10 kohms or higher U48-1 (ALO) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
The circuit sends a signal to the stereo component amplifier to mute noise. Because of that, the noise produced by changing the sound source ceases.
Scheme 194
Scheme 195
- CHECK WIRE HARNESS (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the K54 receiver connector. Disconnect the U29 amplifier connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K54-7 (MUTE) - U29-1 (MUTE) Below 1 ohms K54-7 (MUTE) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY Replace the stereo component amplifier and check if it operates normally. OK The audio system operates normally. NG --> OK (REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY) OK --> REPLACE RADIO RECEIVER ASSEMBLY
Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.
When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function normally as the communication is discontinued.
The stereo component amplifier performs switch operation control during driving by receiving a vehicle speed signal from the combination meter.
Scheme 196
Scheme 197
- CHECK OPERATION OF SPEEDOMETER Drive the vehicle and check if the function of the speedometer in the combination meter is normal. OK Actual vehicle speed and the speed indicated on the speedometer are the same. HINT: The vehicle speed sensor is functioning normally when the indication on the speedometer is normal. NG --> See step 3 OK: Go to next step
- CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - COMBINATION METER) Disconnect the U29 display connector. Disconnect the K31 meter connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester connection Specified condition U29-11 (SPD) - K31-9 (+S) Below 1 ohms U29-11 (SPD) - Body ground 10 Kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
- GO TO METER / GAUGE SYSTEM. Refer to «PROBLEM SYMPTOMS TABLE»(ref-387092-S40766910582011022400000)
This circuit sends a DVD image signal from the radio receiver to the multi-display.
Scheme 198
Scheme 199
- CHECK WIRE HARNESS (MULTI-DISPLAY - RADIO RECEIVER) Disconnect the z17 display connector. Disconnect the z16 receiver connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition z17-4 (VV-) - z16-2 (GND) Below 1 ohms z17-1 (VV+) - z16-1 (NTSC) Below 1 ohms z17-4 (VV-) - Body ground 10 kohms or higher z17-1 (VV+) - Body ground 10 kohms or higher z16-3 (SLD) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
w/ LEXUS Link System
This circuit sends a microphone signal from the microphone to the multi-display through the mayday ECU. It also supplies power from the mayday ECU to the microphone.
w/o LEXUS Link System
This circuit sends a microphone signal from the microphone to the multi-display. It also supplies power from the multi-display to the microphone.
Scheme 200
Scheme 201
Scheme 202
Scheme 203
Scheme 204
Scheme 205
Scheme 206
Scheme 207
Scheme 208
- CHECK MULTI-DISPLAY Check the waveform of the microphone using an oscilloscope. OK Waveform that matches sound spoken into microphone is output. Item Content Tester Connection K47-11 (MIN+) - K47-10 (MIN-) Tool Setting 0.2 V/DIV., 0.2 μs/DIV. Condition w/ LEXUS Link System: Power switch ON (ACC) and overhead junction block's "PHONE" button pressed w/o LEXUS Link System: Power switch is ON (ACC) and steering pad switch's "Voice" switch is pressed OK --> REPLACE MULTI-DISPLAY NG: Go to next step
- CHECK LEXUS LINK SYSTEM Check if the vehicle is equipped with the LEXUS link system. RESULT: Result Proceed to w/ LEXUS Link System A w/o LEXUS Link System B B --> See step 7 A: Go to next step
- CHECK WIRE HARNESS (MAYDAY ECU - OVERHEAD JUNCTION BLOCK AND MULTI-DISPLAY) Disconnect the U45 ECU connector. Disconnect the W6 junction block connector. Disconnect the K47 display connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition U45-7 (MCVD) - W6-19 (ACC) Below 1 ohms U45-8 (MCI+) - W6-3 (MI1+) Below 1 ohms U45-9 (MCI-) - W6-2 (MIC-) Below 1 ohms U45-17 (MCO+) - K47-11 (MIN+) Below 1 ohms U45-18 (MCO-) - K47-10 (MIN-) Below 1 ohms U45-19 (SG) - Body ground 10 kohms or higher U45-7 (MCVD) - Body ground 10 kohms or higher U45-8 (MCI+) - Body ground 10 kohms or higher U45-9 (MCI-) - Body ground 10 kohms or higher U45-17 (MCO+) - Body ground 10 kohms or higher U45-18 (MCO-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK MAYDAY ECU (MCVD VOLTAGE) Reconnect the U45 ECU connector. Measure the voltage of the ECU. Standard voltage Tester Connection Condition Specified Condition U45-7 (MCVD) - Body ground Power switch ON (ACC) 4 to 6 V NG --> REPLACE MAYDAY ECU OK: Go to next step
- CHECK MAYDAY ECU Reconnect the W6 junction block connector. Check the waveform of the mayday ECU using an oscilloscope. OK Waveform that matches sound spoken into microphone is output. Item Content Tester Connection U45-8 (MCI+) - U45-9 (MCI-) Tool Setting 0.2 V/DIV., 0.2 μs/DIV. Condition Power switch ON (ACC) and overhead junction block's "PHONE" button pressed OK --> REPLACE MAYDAY ECU NG: Go to next step
- CHECK MICROPHONE ASSEMBLY Remove the microphone from the overhead junction block. Measure the resistance of the microphone. Standard resistance Tester Connection Specified Condition 1 (MIC+) - 3 (MIC-) 1.9 to 2.2 kohms NG --> REPLACE MICROPHONE ASSEMBLY OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
- CHECK WIRE HARNESS (OVERHEAD JUNCTION BLOCK - MULTI-DISPLAY) Disconnect the W6 junction block connector. Disconnect the K47 display connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition K47-9 (MACC) - W6-19 (ACC) Below 1 ohms K47-11 (MIN+) - W6-3 (MI1+) Below 1 ohms K47-10 (MIN-) - W6-2 (MIC-) Below 1 ohms K47-9 (MACC) - Body ground 10 kohms or higher K47-11 (MIN+) - Body ground 10 kohms or higher K47-10 (MIN-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK MULTI-DISPLAY (MACC VOLTAGE) Reconnect the K47 display connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition K47-9 (MACC) - Body ground Power switch ON (ACC) 4 to 6 V NG --> REPLACE MULTI-DISPLAY OK: Go to next step
- CHECK MICROPHONE ASSEMBLY Remove the microphone from the overhead junction block. Measure the resistance of the microphone. Standard resistance Tester Connection Specified Condition 1 (MIC+) - 3 (MIC-) 1.9 to 2.2 kohms NG --> REPLACE MICROPHONE ASSEMBLY OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
The radio receiver sends only DVD sound signal to the stereo component amplifier through this circuit.
The sound signal that has been sent is amplified by the stereo component amplifier, and then is sent to the speakers.
If there is an open or short in the circuit, only DVD sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier or speakers.
Scheme 209
Scheme 210
Scheme 211
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER) Disconnect the connectors from the radio receiver and stereo component amplifier. Measure the resistance according to the value(s) in the table below. Standard resistance Tester connection Condition Specified condition z14-1 (DVD) - z15-1 (DVD) Always Below 1 ohms z14-1 (DVD) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
This circuit provides power to the radio receiver.
Scheme 212
Scheme 213
- INSPECT FUSE (RAD NO. 3, ACC) Disconnect the RAD NO. 3 fuse from the main body ECU LH. Disconnect the ACC fuse from the main body ECU RH. Measure the resistance of the fuses. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
- CHECK WIRE HARNESS (RECEIVER - BATTERY AND BODY GROUND) Disconnect the K54 receiver connector. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition K54-20 (GND) - Body ground Below 1 ohms Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition K54-1 (B) - Body ground Always 10 to 14 V K54-11 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
This circuit provides power to the stereo component amplifier.
Scheme 214
Scheme 215
- INSPECT FUSE (RAD NO. 1, RAD NO. 2, ACC) Disconnect the RAD NO. 1 and RAD NO. 2 fuses from the engine room No. 1 junction block. Disconnect the ACC fuse from the main body ECU RH. Measure the resistance of the fuses. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
- CHECK WIRE HARNESS (AMPLIFIER - BATTERY AND BODY GROUND) Disconnect the U29, U31 and U42 amplifier connectors. Measure the resistance of the wire harness side connector. Standard resistance for CD changer models for DVD changer models Tester Connection Specified Condition U42-2 (GND) - Body ground Below 1 ohms U42-6 (GND2) - Body ground Below 1 ohms Tester Connection Specified Condition U31-16 (GND) - Body ground Below 1 ohms U31-15 (GND2) - Body ground Below 1 ohms Measure the voltage of the wire harness side connectors. Standard voltage for CD changer models for DVD changer models Tester Connection Condition Specified Condition U42-1 (+B) - Body ground Always 10 to 14 V U42-3 (+B2) - Body ground Always 10 to 14 V U29-12 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V Tester Connection Condition Specified Condition U31-1 (+B) - Body ground Always 10 to 14 V U31-10 (+B2) - Body ground Always 10 to 14 V U29-12 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)
This is the power source circuit to operate the gateway ECU.
Scheme 216
Scheme 217
- INSPECT FUSE (ACC, ECU-IG RH, MPX-B) Disconnect the ACC and ECU-IG RH fuses from the main body ECU RH. Disconnect the MPX-B fuse from the engine room No. 2 relay block. Measure the resistance of the fuses. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
- CHECK WIRE HARNESS (GATEWAY ECU - BATTERY AND BODY GROUND) Disconnect the K66 ECU connector. Measure the resistance and voltage of the wire harness side connector. Standard resistance Tester Connection Specified Condition K66-24 (GND) - Body ground Below 1 ohms Standard voltage Tester Connection Condition Specified Condition K66-10 (BATT) - Body ground Always 10 to 14 V K66-2 (ACC) - Body ground Power switch ON (ACC) 10 to 14 V K66-1 (IG) - Body ground Power switch ON (IG) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-387171-S39945431822011022400000)