Toyota Yaris: Active Noise Control System / Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
HINT:
Removing dealer installed options and optional components before performing diagnosis makes it easier to determine the location of a malfunction.
Active Noise Control System
Symptom | Suspected Area | Link |
Muffled engine sounds in cabin | Using the Customize Parameters, check that the ANC function has not turned off. |
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Proceed to "Power Source Circuit" |
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Front No. 1 speaker assembly LH |
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Front No. 1 speaker assembly RH |
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Front No. 2 speaker assembly LH |
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Front No. 2 speaker assembly RH |
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Rear speaker assembly LH |
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Rear speaker assembly RH |
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Harness or connector | - |
Stereo component equalizer assembly |
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Abnormal noise from speakers | Front No. 1 speaker assembly LH |
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Front No. 1 speaker assembly RH |
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Front No. 2 speaker assembly LH |
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Front No. 2 speaker assembly RH |
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Rear speaker assembly LH |
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Rear speaker assembly RH |
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Harness or connector | - |
Stereo component equalizer assembly |
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TERMINALS OF ECU CHECK STEREO COMPONENT EQUALIZER ASSEMBLY
Terminal No. (Symbol) Terminal Description Condition Specified Condition O131-15(+B) - O131-30(GND) Power source Always 11 to 14 V O131-29(IGP) - O131-30(GND) Power source (IG) Ignition switch ON 11 to 14 V O131-14(ACC) - O131-30(GND) Power source (ACC) Ignition switch ACC 11 to 14 V O131-30(GND) - Body ground Ground Always Below 1 Ω O132-1(MC1+) - O131-30(GND) Active noise control microphone input signal Active noise control microphone LH tapped with finger Pulse generation O132-5(MC1-) - O131-30(GND) Active noise control microphone input signal Always Below 1 Ω O132-2(MC2+) - O131-30(GND) Active noise control microphone input signal Active noise control microphone RH tapped with finger Pulse generation O132-6(MC2-) - O131-30(GND) Active noise control microphone input signal Always Below 1 Ω O131-3(NEI) - O131-30(GND) Engine pulse signal Idling with warm engine Pulse generation (See waveform 1) O131-24(FLI-) Active noise control microphone output signal - - O131-9(FLI+) Active noise control microphone output signal - - O131-23(FRI-) Active noise control microphone output signal - - O131-8(FRI+) Active noise control microphone output signal - - O131-5(RRI+) Active noise control microphone output signal - - O131-20(RRI-) Active noise control microphone output signal - - O131-6(RLI+) Active noise control microphone output signal - - O131-21(RLI-) Active noise control microphone output signal - - O131-7(ASG1) Shield ground - - O131-22(ASG2) Shield ground - - O131-12(FR+) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-27(FR-) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-13(FL+) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-28(FL-) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-10(RR+) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131+25(RR-) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-11(RL+) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-28(RL-) - O131-30(GND) Sound signal Active noise control system operating Pulse generation O131-1(CANH) CAN communication signal - - O131-16(CANL) CAN communication signal - - (a) Waveform 1 HINT: The oscilloscope waveform shown in the illustration is an example for reference only...
Other information:
DESCRIPTION If the engine stop and start ECU receives the off signal from the certification ECU (smart key ECU assembly) when communication with the ECM is normal, the engine stop and start ECU will output DTC P253014. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note P253014 Ignition Switch Circuit Short to Ground or Open All of the following conditions are met for 10 seconds or more (1 trip detection logic):
Ignition switch off signal is input...
COMPONENTS ILLUSTRATION
*A for Driver Side *B for Front Passenger Side *1 FRONT DOOR LOWER FRAME BRACKET GARNISH *2 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT ARMREST BASE UPPER PANEL *3 POWER WINDOW REGULATOR SWITCH ASSEMBLY WITH FRONT ARMREST BASE UPPER PANEL *4 FRONT DOOR TRIM GARNISH *5 FRONT DOOR TRIM BOARD SUB-ASSEMBLY *6 FRONT DOOR GLASS INNER WEATHERSTRIP *7 FRONT DOOR SERVICE HOLE COVER *8 SIDE AIRBAG PRESSURE SENSOR
Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft...
Categories
Stop the vehicle completely.
Manual transaxle:
Shift into neutral and set the parking brake.
Automatic transaxle:
Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is
off.
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