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Thread: What does the Z20LET ECU control?

  
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    MikeWarner's Avatar
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    Question What does the Z20LET ECU control?

    Does anyone know what else appart from the engine the Z20LET ECU controls or sends a signal to? I am trying to find out what items rely of the ECU being present.

    ie. Radiator fans? Air bags? ABS? Trip computer? SatNav? Power steering pump? ESP? Aircon? Cruise control? Heated seats? Fag lighter?.......

    Cheers?
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    davidof's Avatar
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    it depends on the options on the car, there is a pin for just about anything ,but it doesnt mean they all have to have a signal to make the engine run.

    The cooling module requires a fair bit of info from the engine ecu,.

    you need some wring diagrams from ebay and tis2000. cd

    dp

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    Yeah, I order some of these yesterday. I'm hoping there will be a full pinout diagram showing what each wire does. I want to know what would be the payoff to fitting an aftermarket ECU, not that I intend to.
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    mike, did you find a diagram? i am desperate need of the ecu pinout at the moment, please pm/email if you managed to get one!!

    thanks!!

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    Mark T's Avatar
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    Early ones had a separate Engine Cooling ECU, but on the later ones it was all controlled by the engine ECU.

    The Cooling ECU only uses the CTS signal.

    Cruise Control is a function of the ECU on Electric thottle models.

    Trip Computer uses the Fuel Signal from the ECU.

    ESP/TC has lots of inputs to the ECU

    AC has input and output from the ECU.
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    Systems
    ENGZ20LET ENGZ20LET Engine Z20LET
    Components
    A5 A5 Control unit - Motronic M55 M55 Pump - Coolant, additional
    B19 B19 Sensor - Pedal position Y2 Y2 Actuator - Recirculation
    B30 B30 Sensor - Knock control 1 Y5 Y5 Solenoid valve - Tank ventilation
    B110 B110 Sensor - Atmospheric pressure Y9.1 Y9.1 Injection valve - Cylinder 1
    F62 F62 Main Fuse Y9.2 Y9.2 Injection valve - Cylinder 2
    K16 K16 Relay - Fuel pump Y9.3 Y9.3 Injection valve - Cylinder 3
    K18 K18 Relay - Engine control unit Y9.4 Y9.4 Injection valve - Cylinder 4
    K82 K82 Relay - Pump, coolant additional Y11 Y11 Throttle valve - Positioner
    Connectors
    X2 X2 Instrument panel & Body front X125 X125 Body front & Control unit - Motronic
    X16 X16 Body front & Battery positive X126 X126 Control unit engine & Control unit - Motronic
    X124 X124 Body front & Engine
    X16 X16 Body front & Battery positive X125 X125 Body front & Control unit - Motronic
    X124 X124 Body front & Engine X126 X126 Control unit engine & Control unit - Motronic
    Grounding Points
    1 1 Distribution, engine compartment
    1 1 Distribution, engine compartment
    Abbreviations
    5A 5 Ampere CRC Cruise control
    15 Ignition voltage F2.39 Fuse F2.39
    15A 15 Ampere F3.46 Fuse F3.46
    20A 20 Ampere F6 Main fuse F6
    30 Constant voltage KSP Fuel pump
    AC Air conditioning Z20LET Engine Z20LET

    Systems
    ENGZ20LET ENGZ20LET Engine Z20LET
    Components
    A5 A5 Control unit - Motronic B117 B117 Sensor - Oxygen, mixture control, heated
    B21 B21 Sensor - Absolute pressure, intake manifold B118 B118 Sensor - Oxygen, catalytic converter check
    B34 B34 Impulse sensor - Crankshaft C1 C1 Condensor - Ignition coil
    B35 B35 Sensor - Camshaft T1 T1 Ignition coil - Direct ignition
    B46 B46 Air mass meter Y8 Y8 Solenoid valve - Boost pressure regulation
    B61 B61 Sensor - Coolant temperature (gauge)
    Connectors
    X2 X2 Instrument panel & Body front X125 X125 Body front & Control unit - Motronic
    X124 X124 Body front & Engine X126 X126 Control unit engine & Control unit - Motronic
    X2 X2 Instrument panel & Body front
    Abbreviations
    15 Ignition voltage F3.46 Fuse F3.46
    15A 15 Ampere GID Graphic Info Display
    30 Constant voltage ID Info Display
    60A 60A IMO Immobiliser
    AC Air conditioning INS Instrument
    AC Air conditioning MID Multi Info Display
    AT Automatic transmission MKM Engine cooling module
    CID Color Info Display MT Manual transmission
    CLS Clutch switch SLS Stop lamp switch
    ECC Electronic climate control TC Traction control
    EHPS Electro-hydraulic power steering WEG Vehicle speed signal
    ESP Electronic stability program Z20LET Engine Z20LET
    F2 Main fuse F2

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    theblueraven's Avatar
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    thanks mate...i hope that makes more sense to me when i read it fully lol

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