Code reading on old cars without diagtools
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Thread: Code reading on old cars without diagtools

  1. #1
    1000+ Posts dmccurtayne's Avatar
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    Default Code reading on old cars without diagtools

    Just wanted to put this here for everybodyís benefit and also for TD who I canít help ATM.

    You need to do it exactly as stated so as to not delete codes by accident.

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    You can just earth the pin you donít really need a switch and you can also use a test light to read codes on the same connector if easier.

    Connect a switched jumper to wire 17 of connector M720 which is the green 2 pin connector. Connect the other terminal of the switched jumper to ground.
    Turn the ignition switch to the "RUN" (ON) position.
    Close the switched jumper for 3 seconds. The "CHECK ENGINE" indicator will come on.
    Open the "switched jumper" and the "CHECK ENGINE" indicator will:

    Blink once for: 1__ (tens)
    Remain off for: 1.5 seconds
    Blink twice for: __2 (units)
    Code 12 which indicates the beginning of the "TEST" sequence has been displayed.


    Wait for the "CHECK ENGINE" light to come on continuously.
    Close the switched jumper for 3 seconds. The "CHECK ENGINE" indicator will come on.
    Open the "switched jumper" and the "CHECK ENGINE" indicator will:

    Blink (tens)
    Remain off for: 1.5 seconds
    Blink (units)
    Remember the first set of flash codes is the (tens) and the second set of flash codes is the (units). The combination of the (tens)+(units) is the displayed fault code. Take note of all the stored codes.


    Repeat steps 4 and 5 until a code 11 is displayed. Up to 5 codes may be stored in the memory. Code 11 indicates the end of the test sequence and there are no other codes stored. Refer to the fault code chart.
    Repair the indicated faults or repeat the test. Be sure to disconnect the "switched jumper" and turn the ignition switch to the "OFF" position before attempting repairs. Disconnecting components and wiring harness connectors with the ignition switch in the "RUN" (ON) position may set additional codes and cause permanent damage to the Motronic system.
    To erase the fault code memory turn the ignition switch to the "RUN" (ON) position.
    Perform a test sequence up to a code 11
    Depress the switched jumper for more than 10 seconds
    The "CHECK ENGINE" indicator should be "ON" and all fault codes should have been cleared.

    Fault codes for Bosch Motronic 1.3 Injection
    205 GTI, 405, (except MY16) up to MY93.
    (1.9 litre engine) XU9J2, XU9JAZ
    CodeDescriptionChecks
    13Inlet air thermistor
    14Coolant temp. sensor
    21Throttle switch (idle position)
    33Airflow sensor
    34Canister purge valve
    35Throttle switch (full load position)
    42Injectors
    15Fuel pump relayFuel pump controls
    31, 32Mixture regulation
    51Check Lambda sensor
    52Try with new ECU
    53Battery voltage
    22,54ECU
    41Vehicle speed sensor

    Fault codes for Bosch Motronic 1.3 Injection
    405 MY16 up to MY93.
    (1.9 litre engine) XU9J4
    CodeDescription
    13Inlet air thermistor
    14Coolant thermistor
    15Fuel pump relay
    21Throttle switch idle function
    22Idle regulation valve
    31Mixture regulation auto-adaptation
    32Mixture regulation auto-adaptation
    33Air flow sensor
    34Canister purge valve
    35Throttle switch full load function
    41Engine speed sensor
    42Injector control
    43Anti-knock function
    44Knock detector
    51Oxygen sensor
    52Mixture regulation
    53Battery voltage
    54Control Unit
    55Mixture adjustment potentiometer


    Fault codes for Magneti Marelli 8P injection
    All 306N3 Models except S16, 405 SRI MY93 onward.
    CodeDescription
    13Inlet air thermistor
    14Coolant thermistor
    15Fuel pump control
    21Throttle potentiometer
    22Idling regulation stepper motor control
    27Vehicle speed sensor
    31Mixture regulation auto-adaptation
    33Inlet manifold pressure sensor
    34Canister purge valve
    41Engine speed sensor
    42Injectors control
    45Coil 1 control function
    52Mixture regulation
    53Battery voltage
    54Ignition injection Control Unit
    57Coil 2 control


    Fault codes for Magneti Marelli FD Monopoint G5 and G6 injection
    205 SI, XU5 1.6 litre engine
    CodeDescription
    13Inlet air thermistor
    14Coolant thermistor
    21Throttle potentiometer
    22Idling regulation stepper motor control
    31Mixture regulation auto-adaptation
    33Inlet manifold pressure sensor
    41Engine speed sensor
    42Injectors control
    45Coil 1 control function
    52Mixture regulation
    53Battery voltage
    54Ignition injection Control Unit
    57Coil 2 control


    Fault codes for Bosch MP3.2 Injection
    306 S16, 405Mi16 MY93 onward. (2 litre engine)
    CodeDescription
    13Inlet air thermistor
    14Coolant thermistor
    15Fuel pump control
    21Throttle potentiometer
    22Idle regulation valve
    25ACAV solenoid valve
    31Mixture regulation auto-adaptation
    33Inlet manifold pressure sensor
    34Canister purge valve
    41Engine speed sensor
    44Knock detection
    51Oxygen sensor
    52Mixture regulation
    53Battery voltage
    54Control Unit
    65No. 1 Cylinder reference sensor
    71No. 1 injector control
    72No. 2 injector control
    73No. 3 injector control
    74No. 4 injector control




    4008
    Gone but not forgotten C5 x7 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time
    speaksgeek, jaahn, JohnW and 2 others like this.
    Garage C5 X7 4008
    Gone but not forgotten 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

  2. #2
    1000+ Posts dmccurtayne's Avatar
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    Default Code reading on old cars without diagtools

    Here is a pic be gentle I drew it on my phone.
    IMG_1570074496.359484.jpg
    A led test light is the best to avoid accidental earthing.
    Using the K light is the best safest way.


    4008
    Gone but not forgotten C5 x7 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time
    Last edited by dmccurtayne; 3rd October 2019 at 02:01 PM.
    Garage C5 X7 4008
    Gone but not forgotten 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

  3. #3
    1000+ Posts dmccurtayne's Avatar
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    Default

    New this video was somewhere


    https://youtu.be/eDD0Ud0oNjw


    4008
    Gone but not forgotten C5 x7 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time
    Kenfuego likes this.
    Garage C5 X7 4008
    Gone but not forgotten 3008 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

  4. #4
    BVH Roger Wilkinson's Avatar
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    Default

    The same trick works on early XMs.

    Roger
    Armidillo likes this.

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