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renault Espace III 2000, 2.2 td - Espace III does not start, no communication wi

Arekst8 8322 16
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How can I check the ECU power, ground, and immobilizer-related wiring on a Renault Espace III 2.2 TD that has no ECU communication and sometimes starts only briefly?

Check the ECU supply first: pin 16 and 33 should have permanent +12 V, and pins 17, 18, 34, and 35 should have the ignition-related power/ground present; if these are correct, move on to the fuel shutoff valve on the injection pump and its ECU-controlled ground [#16827325] In this model, the immobilizer module under the passenger footwell is also mentioned as a common failure point [#16824903] The pump has a top potentiometer for the throttle lever and a lower electrovalve; the lower valve gets power after ignition and ground from the ECU, and if it only clicks briefly but the engine still will not start, that valve or its immobilizer control is suspect [#16837020] The thread also suggests the coded pump valve may be the part to replace if you want a bypass-style repair, although no exact substitute part number is given [#16843830]
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  • #1 16810470
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    Hello, I need a communication bus diagram or motor driver pinologies.
    The car stopped firing. The ECU was replaced due to the rotten contacts in the old one. After replacing the ECU and before, there was no communication with the interface.
    In addition, the car can start and when it starts, it goes to extinction.
    Normally, when I turn the key, the red indicator of the immobilizer does not go out and then it does not turn on, sometimes when it goes out, the engine starts.
    Error in the DF063 immo module - no confirmation from the solenoid valve.
    What I noticed even when I completely disconnect the ECU, the immo light is red and the same error pops up in the immo module.
    So I suppose the problem is somewhere with the ECU communication but nowhere I can get schematics so that I can check anything.
    Maybe someone can help me.
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  • #2 16810516
    Opalony
    Level 13  
    Posts: 193
    Help: 8
    Rate: 48
    If the contacts in the old one are rotten, what is the condition of the ECU connector?
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  • #3 16810905
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    The ECU connector has been cleaned and checked. As I had dismantled the new ECU for immo memory soldering, I checked the transition between the wires and the ECU board. I just don't know which are the communication and power pins.

    Added after 15 [hours] 18 [minutes]:

    Is there anyone who can help me?
  • #4 16816981
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    Maybe someone will give you an idea.
  • #5 16817020
    kamiloskop
    Level 23  
    Posts: 555
    Help: 42
    Rate: 278
    Buddy, give the type, model of the engine driver and you need to find ground power and communication under it
  • #6 16819327
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    My fellow engine driver is Bosch 0 281 001 590.
    If you have any information, please, please. I researched a lot and can't find any information anywhere.
  • #7 16819973
    eadamus221
    Level 12  
    Posts: 29
    Help: 2
    Rate: 21
    Hello, check the bolt




    Moderated By T5:

    3.1.11. Don't post messages that add nothing to the discussion. They are misleading, dangerous or do not solve the user's problem.

  • #8 16824357
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    What do you mean?
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  • #9 16824770
    eadamus221
    Level 12  
    Posts: 29
    Help: 2
    Rate: 21
    Hello, the bolt is the electronic lock of the ignition switch, the immo information passes through it, move the steering wheel vigorously and see if you hear a grinding noise
  • #10 16824806
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    In Espace III, there is no bolt, there is an ordinary ignition.
  • #11 16824903
    eadamus221
    Level 12  
    Posts: 29
    Help: 2
    Rate: 21
    In the evening I will give power to the controller but in these models the ear module under the passenger's feet often failed, I can make the controller off as the power supply will match
  • #12 16827325
    eadamus221
    Level 12  
    Posts: 29
    Help: 2
    Rate: 21
    Hello, t5, as usual, fast gives power to the computer pin 16 and 33 plus after ignition pin 17 18 35 34 ground.
    If the power supply is ok, it is connected to the fire extinguisher on the pump, checking the power supply on the fire extinguisher 3 wires plus minus and a signal
  • #13 16827944
    milejow

    Level 43  
    Posts: 13052
    Help: 1559
    Rate: 5115
    The valve coded on the pump is opened there and after the procedure.
    Company Account:
    Działalność własna
    Mętów 99, Lublin, 20-388
  • #14 16831211
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    Ok. today I will check the power and let you know.
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  • #15 16837020
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    Power and ground come on. Regarding the valves on the pump:
    1. Mounted from the top - it is not a solenoid valve, but a potentiometer connected to the lever to which the throttle cable is connected.
    2. An electrovalve is mounted on the bottom. Power comes after ignition, while ground from the ECU. even when I give the weight, you can hear the valve for a short time but the car does not start.

    I have heard that you can replace the valve in the pump with a regular one and it will work, but I don't know which one and whether it applies to my case.

    I attach a photo of the pump with a visible potentiometer renault Espace III 2000, 2.2 td - Espace III does not start, no communication wi .
  • #16 16843830
    Arekst8
    Level 13  
    Posts: 42
    Help: 7
    Rate: 16
    The only option to start the vehicle is to replace the coded valve on the pump with a regular one powered after ignition. Can someone suggest:
    1. How to get to this coded valve, because it is built-in?
    2. What type or model of a regular solenoid should I look for?
  • #17 16844237
    kaza12
    Level 10  
    Posts: 28
    Help: 1
    Rate: 7
    Arekst8 wrote:
    How to get to this coded valve, because it is built-in?
    Cutting
    Arekst8 wrote:
    What type or model of a regular solenoid should I look for?
    The store will know
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Topic summary

✨ The discussion revolves around a Renault Espace III (2000, 2.2 TD) that fails to start and exhibits communication issues with the ECU after a replacement due to faulty contacts. The immobilizer light remains red, indicating a potential problem with the ECU communication. Users suggest checking the ECU connector and the ignition switch, while also discussing the engine driver model (Bosch 0 281 001 590) and the importance of power and ground connections. The conversation highlights the need for a communication bus diagram and troubleshooting steps, including checking the coded valve on the fuel pump, which may need replacement with a standard solenoid valve for the vehicle to start.
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FAQ

TL;DR: Espace III 2.2 dT non-starts often trace to power/ground on 6 ECU pins; “power to the computer pin 16 and 33.” [Elektroda, eadamus221, post #16827325]

Why it matters: This FAQ shows how to verify feeds, immobilizer clues, and the coded pump valve so you can restore starts.

Quick-Facts

Quick Facts

How do I start diagnosing “no communication” with the ECU on Espace III 2.2 dT?

Verify ECU feeds first. Check battery+ at pins 16 and 33. Check ignition+ at pins 17, 18, 34, and 35. Confirm grounds. If feeds are missing, repair power or ground before chasing the bus. Many “no comms” cases resolve when these six pins are correct. “Power to the computer pin 16 and 33.” [Elektroda, eadamus221, post #16827325]

What does DF063 “no confirmation from the solenoid valve” mean here?

It indicates the immobilizer does not receive confirmation from the diesel pump’s shut-off solenoid. The same DF063 appears even when the ECU is unplugged, pointing to an immobilizer or wiring path issue rather than only the ECU. The red immobilizer LED staying on matches this symptom profile on this car. [Elektroda, Arekst8, post #16810470]

Which engine ECU is fitted and why does it matter?

This case uses a Bosch 0 281 001 590 ECU. Knowing the exact part lets you follow the cited pinout for power and ignition feeds, and match ground locations during continuity checks. It also helps when sourcing a donor ECU or verifying immobilizer pairing after EEPROM work. [Elektroda, Arekst8, post #16819327]

What are the exact ECU power and ignition pins to check?

Battery power goes to pins 16 and 33. Ignition-switched power goes to pins 17, 18, 34, and 35. Ensure robust grounds at the ECU connector. If these are correct, proceed to check the pump shut-off circuit and immobilizer path. Use a load test, not just a voltmeter. [Elektroda, eadamus221, post #16827325]

How do I test the pump shut-off electrovalve on this engine?

Confirm power after ignition at the valve, with ECU providing ground. Expect three wires: plus, minus, and a signal. If you manually ground it and only hear a brief click, yet the engine won’t start, the fault lies beyond a simple coil activation. That’s a key failure clue during diagnosis. [Elektroda, Arekst8, post #16837020]

Can I replace the coded shut-off valve with a standard solenoid?

Yes. Users report starting success after swapping the coded valve for a regular, ignition-fed solenoid. Ask parts suppliers for the correct diesel shut-off solenoid for your pump family. Note that access requires physical modification of the pump cover. “The store will know.” [Elektroda, kaza12, post #16844237]

How do I access the built-in coded valve to swap it?

Access involves removing the tamper-proof cover over the coded valve. In practice, that means cutting the cover to reach and replace the valve. After removal, fit a standard solenoid and wire it to ignition power as advised. “Cutting.” [Elektroda, kaza12, post #16844237]

Is there a known module location that fails on these cars?

Yes. A module located under the passenger’s feet is noted as a frequent failure point. If power and grounds at the ECU check out, inspect this module for corrosion, water ingress, or connector faults before deeper ECU work. [Elektroda, eadamus221, post #16824903]

The immobilizer LED stays red even with the ECU unplugged—what does that tell me?

It suggests the immobilizer system reports DF063 independently of ECU presence. That points to immobilizer circuit issues or pump-valve confirmation wiring, not just an ECU fault. Treat the immo path and pump valve as primary suspects. [Elektroda, Arekst8, post #16810470]

How can I verify the ECU connector and internal continuity?

Clean and inspect the ECU connector. Then confirm continuity from harness pins to the ECU PCB, especially after EEPROM or immobilizer memory work. If continuity is solid, return to feed checks and the pump valve control line. Document each pin test. [Elektroda, Arekst8, post #16810905]

What is the “communication bus” in this context?

Here, it refers to the wiring that lets the diagnostic interface and immobilizer talk to the ECU. If that path is compromised, you’ll see no communication and immobilizer errors. Restoring ECU power/grounds and pump-valve confirmation is essential before bus tracing. [Elektroda, Arekst8, post #16810470]

Three-step how-to: fix Espace III 2.2 dT no-start with immo error

  1. Verify ECU battery+ on pins 16,33 and ignition+ on 17,18,34,35; confirm grounds.
  2. Check pump shut-off valve for ignition power and ECU ground control.
  3. If immo DF063 persists, inspect wiring and consider coded-to-regular valve swap. [Elektroda, eadamus221, post #16827325]

Does this Espace III have an electronic steering lock (“bolt”)?

No. The reported Espace III uses a conventional ignition, not an electronic steering lock. If you suspect steering-lock faults, you’re likely chasing the wrong system on this model. Focus on ECU feeds and the pump valve. [Elektroda, Arekst8, post #16824806]

Why does the engine start then immediately stall?

That pattern aligns with immobilizer-related fuel cut or the pump shut-off valve not staying enabled. The red immo LED behavior and DF063 error support this path. Confirm valve control and immobilizer confirmation wiring once power pins check out. [Elektroda, Arekst8, post #16810470]

What’s the top-mounted part on the fuel pump—solenoid or something else?

It’s a potentiometer linked to the throttle lever, not the shut-off solenoid. The actual shut-off electrovalve sits at the bottom of the pump. Test the lower valve for power, ground, and signal during cranking. [Elektroda, Arekst8, post #16837020]
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