• Reading the VR-4's Diagnostic Codes - The "Flashy Dash" Technique

    Here is a simple illustration of the OBD-II port located on the underside of the dash, near the driver's left knee:

    ----------------------------
    \.01.02.03.04.05.06.07.08../
    .\09.10.11.12.13.14.15.16./
    ..------------------------


    Grounding pin 1 is the way to obtain any stored error codes. You can ground it to a chassis point, any other earth, or most usually (because it's closest and easiest) pin 4.

    I use a short piece of wire with stripped ends for the desired effect. A paperclip may also suffice. Some of you may even choose to put in a little switch, so it can be turned on and off as you please!



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    Instructions:

    1. Earth pin 1, in your chosen fashion;
    2. Turn the ignition on;
    3. You will then have the flashy dash (lights flashing should be Engine Management Light, TCL OFF light (if equipped), 'Skiddy Car' light, 'N' on auto selector (if applicable), AYC light (if equipped), ABS light, SRS light;
    4. Any light that is flashing regularly (about twice a second) has no stored codes;
    5. Any light flashing irregularly, will cycle through all stored codes, repeatedly;
    6. Each code is two digits, and zeroes are not used.
    6a. The values are technically Hexadecimal. In almost every case, only 1-9 are used (i.e. the lowest code possible is 11, and the highest is 99), but some codes use A-F, which will be 10-15 flashes (i.e. 1F is one long flash, and 15 short flashes);
    7. Long flashes (about a second or so each) indicate the first digit, while short flashes indicate the second digit;
    8. There is about two seconds between each stored code;
    9. Codes are shown in ascending numerical order;
    10 Note the codes down, then refer to the diagnostic codes list below.

    To clear the stored codes, simply disconnect the battery (NB: This does not clear SRS fault codes). Sorry folks, this does mean however that any lovely stored settings in the auto ECU will also be lost, and will take about 250 miles (about a tank of fuel) to re-learn.



    Example Video

    The following video shows what you'll expect to see when you've correctly connected pin 1 to ground.



    The following errors are shown in this video:
    Engine ECU - 71, 72
    AYC - No fault
    TCL - 77
    A/T - No fault
    ABS - No fault
    ASC - No fault
    SRS - Not shown - possibly bulb removed to mask a fault?

    I always find it easiest to watch one light at a time, and keep watching until you see each code 3 times - this ensures that you've seen them all, and that you've noted each down correctly.



    The codes listed after the description detail which section in the Workshop Manuals you can look at for further troubleshooting information.

    As I'm sure your English is better than your Japanese, the page references for both manuals are listed where applicable, to ease translation and understanding.



    Engine ECU Error codes (flashing Engine Management Light)

    Code Diagnosis Reference page
    (Japanese Manual)
    Reference Page
    (EUDM Manual)
    Notes
    12 Air flow sensor system 13A-11 13A-113
    13 Intake Air Temperature sensor system 13A-11 13A-113
    14 Throttle Position sensor system 13A-12 13A-114
    21 Engine Coolant Temperature sensor system 13A-13 13A-115
    22 Crank Angle sensor system 13A-13 13A-116
    23 TDC sensor systems or Cam Position sensor system 13A-14/13A-15 13A-117
    24 Vehicle Speed Sensor system 13A-16 13A-118
    25 Atmospheric (barometric) pressure sensor system 13A-17 13A-119
    31 Knock sensor system 13A-18 13A-31
    41 Injector system 13A-18 13A-120
    44 Ignition coil, power transistor unit system (for No.1/No.4 cylinder) 13A-19
    52 Ignition coil, power transistor unit system (for No.2/No.5 cylinder) 13A-19
    53 Ignition coil, power transistor unit system (for No.3/No.6 cylinder) 13A-19
    61 A/T-ECU (torque decrease required signal) system 13A-20 13A-123 A/T Only
    64 Alternator FR terminal system 13A-21 13A-123
    71 Vacuum control solenoid valve system 13A-21 13A-124 Vehicles with TCL
    72 Ventilation control solenoid valve system 13A–22 13A-125 Vehicles with TCL
    1 A No.1 cylinder misfire detection 13A–23
    1 B No.2 cylinder misfire detection 13A–23
    1 C No.3 cylinder misfire detection 13A–23
    1 D No.4 cylinder misfire detection 13A–23
    1 E No.5 cylinder misfire detection 13A–23
    1 F No.6 cylinder misfire detection 13A–23
    2 C Taki tube misfire detection 13A-24




    AYC Error Codes (flashing AYC light)

    12 - power supply voltage (valve power source) system (broken wire or short) 27− 14
    21 - FR wheel speed sensor system (broken wire or short) 27− 15
    22 - FL wheel speed sensor system (broken wire or short) 27− 15
    23 - RR wheel speed sensor system (broken wire or short) 27− 15
    24 - RL wheel speed sensor system (broken wire or short) 27− 15#
    25 - Tandem tire 27− 16
    26 - Wheel speed sensor abnormal 27− 17
    31 - Steering sensor (ST−1, ST−2 and ST−N) system (broken wire) 27− 18
    32 - Steering sensor (ST−N) system (short) 27− 19
    33 - Steering sensor (ST−N) system 27− 19
    34 - Steering sensor (ST−1 and ST−2) system (short circuit) 27− 20
    41 - TPS system (broken wire or short circuit) approximately 27− 20
    51 - G sensor system (broken wire or short circuit) approximately 27− 21
    52 - G sensor 27− 22
    56 - Side G sensor system (broken wire or short) 27− 21
    61 - Stop lamp switch system (broken wire) 27− 22
    65 - ABS monitor system (broken wire or ABS breakdown) 27− 23
    71 - Proportional valve system (broken wire or short) 27− 24
    72 - Direction valve (the right) system (broken wire or short) 27− 25
    73 - Direction valve (the left) system (broken wire or short) 27− 26
    81 - Electromotive pump relay system (broken wire or short) 27− 27
    82 - Electromotive pump breakdown 27− 28
    83 - Electromotive pump breakdown 27−30



    TCL ECU Error Codes (flashing TCL OFF light)

    11 - FR wheel speed sensor (broken wire or short) group
    12 - FL wheel speed sensor (broken wire or short)
    13 - RR wheel speed sensor (broken wire or short)
    14 - RL wheel speed sensor (broken wire or short)
    15 - Wheel speed sensor system (output signal abnormality)
    16 - The power source voltage abnormality of ECU 13H-4
    17 - TCL switch circuit system 13H- 4
    21 - FR wheel speed sensor system group ]
    22 - FL wheel speed sensor system
    23 - RR wheel speed sensor system
    24 - RL wheel speed sensor system
    25 - Rear wheel speed sensor systems (rear wheel speed sensor left and right simultaneous broken wire) 13H-5
    26 - Rear wheel speed sensor systems (rear wheel speed sensor both breakdown)
    27 - Wheel speed sensor system (front and back wheel speed sensor both breakdown)
    31 - Ignition switch (IG2) system 13H- 5
    32 - G sensor circuit system group
    33 - Stop lamp switch system (broken wire or ON breakdown)
    35 - Steering wheel sensor (ST-1, 2, N) system
    36 - Steering wheel sensor (ST-N) system
    37 - Steering wheel sensor (ST-1, 2) system
    41 - FR solenoid valve system
    42 - FL solenoid valve system
    43 - RR solenoid valve system
    44 - RL solenoid valve system
    45 - FR diagonal cutting valve system
    46 - FL diagonal cutting valve system
    47 - FR diagonal raising the pressure Valve system
    48 - FL diagonal raising the pressure valve system
    49 - Accumulation of pressure valve (FL-FR) system
    51 - valve relay system (ON breakdown)
    52 - valve relay system (OFF breakdown)
    53 - Motor relay system (OFF breakdown)
    54 - Motor relay system (ON breakdown)
    55 - Motor system (pump motor adherence) the channel 13H- 6
    61 - Channel of A/T-ECU
    63 - ECU failing
    65 - APS or TPS system 13H- 7
    66 - TPS or APS system 13H- 8
    67 - APS system 13H- 8
    71 - Side G sensor circuit system group
    72 - Yaw rate sensor circuit system (broken wire or short)
    73 - Master cylinder pressure sensor circuit system
    74 - Yaw rate or side G sensor system Channel 13H- 9
    75 - Engine ECU system 13H- 9
    76 - Channel of engine ECU
    77 - TCL vacuum or ventilation solenoid valve system 13H- 9
    78 - Accumulator pressure sensor circuit system group
    81 - Brake liquid level insufficient



    A/T ECU Error codes (flashing 'N' on autobox selection indicator)

    12 - Throttle position sensor system TCL non equipped car
    accelerator pedal position sensor system TCL equipped car
    Short circuit
    13 - Throttle position sensor system TCL non equipped car
    accelerator pedal position sensor system TCL equipped car
    broken wire
    14 - Throttle position sensor system TCL non equipped car
    accelerator pedal position sensor system TCL equipped car
    sensor maladjustment
    15 - Oil temperature sensor system broken wires 23- 14
    21 - Crank angular sensor system broken wire 23- 15
    22 - Input axis speed sensor system short circuit/broken wire 23- 15
    23 - Output axis speed sensor system short circuit/broken wire 23- 16
    26 - Stop lamp switch system short circuit 23- 17
    31 - LR solenoid valve system short circuit/broken wire 23- 17
    32 - UD solenoid valve system short circuit/broken wire 23- 17,
    33 - ND solenoid valve system short circuit/broken wire 23- 17
    34 - OD solenoid valve system short circuit/broken wire 23- 17
    35 - RED solenoid valve system short circuit/broken wire 23- 17
    36 - DCC solenoid valve system short circuit/broken wire 23- 18
    41 - You do not shift gear do not complete 1st gear 23- 19
    42 - You do not shift gear do not complete 2nd gear 23- 20
    43 - You do not shift gear do not complete 3rd gear 23- 21
    44 - You do not shift gear do not complete 4th gear 23- 22
    45 - You do not shift gear do not complete 5 speeds 5A/T 23- 23
    46 - You do not shift gear do not complete retreat (reverse) 23-24
    51 - Engine ECU Communication abnormal (TCL non equipped car) ASC-ECU (TCL control section) communication abnormal (TCL equipped car) 23-25
    52 - DCC solenoid valve system system defective 23- 18
    54 - A/T control relay system ground short circuits/broken wire 23- 25
    56 - N range lamp system Ground short circuit 23-26
    71 - The abnormality of A/T-ECU 23-26



    ABS 2WD Error Codes (flashing ABS light)

    11 - Wheel speed sensor (FR) system (broken wire or short) 35B- 5
    12 - Wheel speed sensor (FL) system (broken wire or short) 35B- 5
    13 - Wheel speed sensor (RR) system (broken wire or short) 35B- 5
    14 - Wheel speed sensor (RL) system (broken wire or short) 35B- 5
    15 - Wheel speed sensor system (output signal abnormal) 35B- 6
    16 - ABS-ECU power source system (voltage abnormal decrease or rise) 35B- 6
    21 - Wheel speed sensor (FR) system 35B- 5
    22 - Wheel speed sensor (FL) system 35B- 5
    23 - Wheel speed sensor (RR) system 35B- 5
    24 - Wheel speed sensor (RL) system 35B- 5
    27 - 2WD/4WD detection switch system 35B- 7
    33 - Stop lamp switch system (broken wire or ON breakdown) 35B-7
    41 - Solenoid valves (FR) system
    42 - Solenoid valve (FL) system
    43 - Solenoid valve (RR) system
    44 - Solenoid valve (RL) system

    When there is no response for the drive signal of the solenoid valve which corresponds to each item or ABS-ECU power source system breakdown

    51 - Valve relay ON breakdown *
    52 - Valve relay OFF breakdown or ABS-ECU power source system breakdown 35B-7- 1
    53 - Motor relay OFF breakdown or ABS-ECU power source system breakdown
    54 - Motor relay ON breakdown *
    55 - Motor system (pump motor adherence) or ABS-ECU power source system breakdown 35B-7- 1

    63 - ABS-ECU system *



    ABS 4WD Error Codes (flashing ABS light)

    27 - 2WD/4WD detection switch system 35C− 2
    32 - Broken wire of G sensor signal conductor, short circuit or signal abnormality 35C−3



    ASC Error Codes (flashing 'Skiddy Car' light)

    11 - FR wheel speed sensor (broken wire or short) 35E− 5
    12 - FL wheel speed sensor (broken wire or short)
    13 - RR wheel speed sensor (broken wire or short)
    14 - RL wheel speed sensor (broken wire or short)
    15 - Wheel speed sensor system (output signal abnormality)
    16 - ECU power supply voltage abnormality 35E-7
    17 - TCL switch system
    21 - FR wheel speed sensor system 35E− 5
    22 - FL wheel speed sensor system
    23 - RR wheel speed sensor system
    24 - RL wheel speed sensor system
    25 - Rear wheel speed sensor system (rear wheel speed sensor left and right simultaneous broken wire)
    26 - Rear wheel speed sensor system (rear wheel speed sensor both breakdown)
    27 - Wheel speed sensor system (front and back wheel speed sensor both breakdown)
    31 - Ignition switch (IG2) system
    32 - G sensor system 35E− 8
    33 - Stop lamp switch system (broken wire or ON breakdown) 35E− 8
    35 - Steering wheel sensor (ST−1, 2, N) system 35E− 9
    36 - Steering wheel sensor (ST−N) system 35E−10
    37 - Steering wheel sensors (ST−1, 2) system 35E− 10
    41 - FR solenoid valve system 35E− 11
    42 - FL solenoid valve system
    43 - RR solenoid valve system
    44 - RL solenoid valve system
    45 - FR diagonal cutting valve system
    46 - FL diagonal cutting valve system
    47 - FR diagonal raising the pressure valve system
    48 - FL diagonal raising the pressure valve system
    49 - Diagonal accumulation of pressure valve system
    51 - Valve relay system (ON breakdown) 35E− 11
    52 - Valve relay system (OFF breakdown) 35E− 12
    53 - Motor relay system (OFF breakdown) 35E− 13
    54 - Motor relay system (ON breakdown) 35E− 14
    55 - Motor system (pump motor adherence)
    61 - Communication system with A/T−ECU
    63 - ECU failure
    65 - APS or TPS system 35E− 14
    66 - TPS or APS system
    67 - APS system
    71 - Lateral G sensor system 35E− 8
    72 - Yaw rate sensor system (broken wire or short) 35E− 15
    73 - Master cylinder pressure sensor system 35E− 15
    74 - Yaw rate or channel 77 TCL vacuum of side G sensor system 35E− 16
    75 - Engine ECU system
    76 - Engine ECU or Ventilation Solenoid Valve system
    78 - Accumulator pressure sensor system 35E− 16
    81 - Brake liquid level insufficiency 35E−17



    SRS ECU Error Codes (flashing SRS light)

    14 - SRS−ECU inside analog G sensor system 52 B
    15, 16 - G sensor system for SRS−ECU inside protrusion
    17 - G sensor system for SRS−ECU inside protruding
    21, 22, 61 and 62 - driver's seat air bag modules (squib) system 52 B – 8
    24, 25, 64 and 65 - passenger seat air bag modules (squib) system 52 B – 9
    31, 32 - SRS−ECU inside DC−DC converter systems 52 B – 10
    34* - connector lock system 52B− 10
    35 - SRS−ECU (air bag development end) system 52 B – 10
    41 * - IG1 (A) power circuit system 52 B – 10
    42 * - IG1 (B) power source The circuit system 52B− 11
    43 - SRS warning lamp drive circuit system (The lamp does not light up or The lamp does not go out)
    44 - SRS warning lamp drive circuit system 52B− 13
    45 - Non-volatile memory inside SRS−EUC (EEPROM) and the like internal circuit system 52 B – 13
    51, 52 - Driver's seat air bag module (squib ignition drive circuit) system 52B−13
    54 and 55 - Passenger seat air bag modules (squib ignition drive circuit) system 52 B – 13
    71, 72, 75 and 76 - right side side air bag modules (squib) system 52B−
    73 and 74 - right side side air bag modules (squib) ignition drive circuit system 52 B – 14
    79 and 93 - left side side impact sensor channels 52 B – 14
    81, 82, 85 and 86 - left side side air bag modules (squib) system 52 B – 14
    83 and 84 - left side side air bag modules (squib) ignition drive circuit system 52 B – 15
    89 and 96 - right side side impact sensor channels 52B−15
    91* - left side side impact sensor power circuit system 52B− 16
    92 - left side side impact sensor system 52 B – 16
    94* - right side side impact sensor power circuit system 52B− 16
    95 - right side side impact sensor system 52B−16

    (1) * the diagnosis cord/code of sign, when returning normally, eliminates the diagnosis cord/code automatically, the SRS warning lamp becomes normal. When (2) diagnosis cord/code 41 and 42 is output simultaneously, because you can think the decrease of battery voltage, before beginning trouble shooting, the battery is inspected.

    Clearing SRS (Airbag) Fault Codes



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