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
- ECU: Bosch 0 281 001 590 used on the reported 2.2 dT vehicle. [Elektroda, Arekst8, post #16819327]
- Symptom cluster: no comms, red immo LED stays on, DF063 “no confirmation from solenoid.” [Elektroda, Arekst8, post #16810470]
- Power layout cited: pins 16,33 battery+, pins 17,18,34,35 ignition+, plus grounds. [Elektroda, eadamus221, post #16827325]
- Pump shut-off valve can be replaced with a regular solenoid; access requires cutting. [Elektroda, kaza12, post #16844237]
- Manual grounding may click the valve, yet engine still won’t start. [Elektroda, Arekst8, post #16837020]
Quick Facts
- ECU: Bosch 0 281 001 590 used on the reported 2.2 dT vehicle. [Elektroda, Arekst8, post #16819327]
- Symptom cluster: no comms, red immo LED stays on, DF063 “no confirmation from solenoid.” [Elektroda, Arekst8, post #16810470]
- Power layout cited: pins 16,33 battery+, pins 17,18,34,35 ignition+, plus grounds. [Elektroda, eadamus221, post #16827325]
- Pump shut-off valve can be replaced with a regular solenoid; access requires cutting. [Elektroda, kaza12, post #16844237]
- Manual grounding may click the valve, yet engine still won’t start. [Elektroda, Arekst8, post #16837020]
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
- Verify ECU battery+ on pins 16,33 and ignition+ on 17,18,34,35; confirm grounds.
- Check pump shut-off valve for ignition power and ECU ground control.
- 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]
