HOW TO PROCEED WITH TROUBLESHOOTING
HINT
Use the following procedure to troubleshoot the vehicle proximity notification system.
- VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
- CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK NEXT: Go to next step
- INSPECT AUXILIARY BATTERY VOLTAGE Measure the auxiliary battery voltage with the power switch off. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step. NEXT: Go to next step
- PROBLEM SYMPTOMS TABLE Result Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B B --> Go to step 6 A: Go to next step
- OVERALL ANALYSIS AND TROUBLESHOOTING Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-551655-S20212176572013051500000) NEXT: Go to next step
- REPAIR OR REPLACE NEXT: Go to next step
- CONFIRMATION TEST NEXT --> END
PROBLEM SYMPTOMS TABLE
HINT
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | See |
|---|---|---|
| Sound is not produced | ECU-IG NO. 1 fuse | |
| Power source circuit | Refer to Power Source Circuit | |
| Engine oil pressure switch circuit | Refer to Engine Oil Pressure Switch Circuit | |
| P position signal circuit | Refer to P Position Signal Circuit | |
| Stop light switch circuit | Refer to Stop Light Switch Circuit | |
| Speaker circuit | Refer to Speaker Circuit | |
| Speed signal circuit | Refer to Speed Signal Circuit | |
| Vehicle approaching speaker controller | Refer to REMOVAL | |
| Sound does not stop | P position signal circuit | Refer to P Position Signal Circuit |
| Stop light switch circuit | Refer to Stop Light Switch Circuit | |
| Engine oil pressure switch circuit | Refer to Engine Oil Pressure Switch Circuit | |
| Speed signal circuit | Refer to Speed Signal Circuit | |
| Vehicle approaching speaker controller | Refer to REMOVAL |
VEHICLE PROXIMITY NOTIFICATION SYSTEM
Scheme 16
Scheme 17
- CHECK VEHICLE APPROACHING SPEAKER CONTROLLER Disconnect the L140 vehicle approaching speaker controller connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. Wiring Color Terminal Description Condition Specified Condition L140-1 (IG) - Body ground G - Body ground IG power supply Power switch on (IG) 11 to 14 V Power switch off Below 1 V L140-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the L140 vehicle approaching speaker controller connectors. Measure the voltage and check for pulses according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition L140-2 (STP) - L140-7 (GND) G - W-B Stop light signal input Brake pedal depressed 8 V or higher Brake pedal released Below 1 V L140-3 (SP+) - L140-8 (SP-) R - W Vehicle approaching speaker output Vehicle approaching speaker operating A waveform synchronized with the sound is output. L140-6 (SPD) - L140-7 (GND) V - W-B Speed signal input Wheel being rotated Pulse generation (See Waveform 1 (Scheme 17) ) L140-11 (SFTP) - L140-7 (GND) R - W-B Transmission shift main switch signal input Power switch on (IG), park (P) selected Below 2.5 V Power switch on (IG), park (P) not selected 8 V or higher L140-12 (OPSW) - L140-7 (GND) R - W-B Engine oil pressure switch signal input Power switch on (READY), engine not operating Below 2 V Power switch on (READY), engine operating 8 V or higher If the result is not as specified, there is a problem in the vehicle approaching speaker controller or wire harness. Waveform 1 (Reference): Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being rotated HINT: If the vehicle speed increases, width (A) becomes narrower.
INSPECTION PROCEDURE
Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Note. Inspect the fuse for circuits related to this system before performing the following inspection procedure.