2014 2.0TDi Crafter Auxiliary Water Pump / Limp Ho |
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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Posted: 07 Jul 20 at 15:16 |
I've got fault code P261A 00, read with
On starting the engine you can feel the pump running. But it stops after around 3 - 4 seconds. The relay opens after maybe 3 to 4 seconds. At this point I get the coil and eml flashing and Stop Start Error displayed. It's in constant limp home mode. I've monitored the voltage at the pump during the few seconds the pump runs. It's healthy at 13V+. The auxiliary water pump was faulty (open circuit) I've replaced it with a new Bosch pump. I also had an intermittent fault logged relating to the relay controlling the pump. "Intermittent open circuit". Since clearing this it hasn't returned. This fault started just after it had it's MOT. I'm wondering if the full throttle smoke test has done something? But I'm now baffled. No other codes are logged. I'm a novice with Ambient tempurate. Atmospheric pressure Volts Intake tempurature etc. When I ran auto scan it picked some additional codes to do with The instrument cluster Key and Emergency light activated which I hadn't found until I did the auto scan. But I don't think they're related to my limp home, stop start, auxilary water pump issue are they? Also VCDS won't communicate with the ABS.
I'll post the scan results below. It's been off the road for 3 weeks now and I've run out of ideas so any help would be great. |
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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+ Reply to Thread Results 1 to 4 of 4
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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Well I've messed that up and I can't edit or delete the previous post for some reason?
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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Pump runs so you have 12v and ground. Ecu says open circuit so it suggests the wire between pump and ecu might be broken. Diagram shows it as a blue wire with green tracer on pin 3 of the three pin plug on the pump.
Assumes the pump is a goid one of course- won't be the first time I've fitted new parts that were dud. TT |
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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Thanks for the reply. I'm feeling pretty dumb right now Turns out Crafters have TWO auxiliary water pumps. I have found and replaced one at the rear of the engine which WAS definitely faulty. I'm guessing that one is for the heater circulation? A simple 2 wire pump. I've now found (what I assume) is the for real egr cooler pump. A 3 wire pump. Located under the expansion tank at the front of the engine. I'll test that one tomorrow and let you know how I get on.
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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Ahh...
Yup 2 wire pump is for heater and is controlled by heater switch. 3 wire pump for egr cooling - hence limp mode if it isn't working. TT |
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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This is really frying my head now I've replaced the egr cooler pump. The pump runs fine with the engine running and continues to run for a short time after the engine is turned off. BUT. The code won't re set. The coil light flashes and the eml is on and its still in limp home mode. The replacement pump is a First Line, so not cheap junk. copy of the auto scan below. Friday,10,July,2020,09:25:40:34525 VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64 VCDS Version: 20.4.1.0 (x64) Data version: 20200331 DS317.0 www.Ross-Tech.com VIN: WV1ZZZ2EZF6023526 License Plate: Chassis Type: 2E-N/A (2E - VW Crafter Panel Van (LT3 / 2006 > 2016)) Scan: 01 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F A0 A1 A2 A3 B0 B1 B2 B3 B4 B5 B6 C1 VIN: WV1ZZZ2EZF6023526 ------------------------------------------------------------------------------- Address 01: Engine (J623-CKTB) Labels:. 03L-906-012-CKT.clb Part No SW: 03L 906 012 J HW: 03L 906 012 A Component: R4 2.0l TDI H26 9977 Revision: 72H26--- Serial number: VWXDZ0N1047149 Coding: 0119401020440D080000 Shop #: WSC 131071 1023 2097151 ASAM Dataset: EV_ECM20TDI01103L906012J 002016 ROD: EV_ECM20TDI01103L906012BS_002.rod VCID: 2B52B95E4283EDDE8E-807E 1 Fault Found: 4875 - Coolant Pump 2 P261A 00 [167] - Open circuit MIL ON - Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 2 Fault Frequency: 1 Mileage: 87454 km Date: 2047.15.31 Time: 31:63:63 Engine speed: 0.00 /min Normed load value: 0.0 % Vehicle speed: 0 km/h Coolant temperature: 25 °C Intake air temperature: 14 °C Ambient air pressure: 990 mbar Voltage terminal 30: 12.300 V Unlearning counter according OBD: 40 Coolant temperature at radiator outlet: actual value: 16.4 °C exh.gas recirc.: shut-off conditions-Bits 0-7: 0 exh.gas recirc.: shut-off conditions-Bits 0-7: 0 exh.gas recirc.: shut-off conditions-Bits 0-7: 0 exh.gas recirc.: shut-off conditions-Bits 0-7: 5 EGR cooling function: status-Bits 0-7: 4 exh.gas recirc. (EGR) cooler pump: specified value: 0.00 % EGR Vacuum Regulator Solen.val.: activation: 100.00 % Exh.gas temp.sen 1: 56.8 °C Readiness: 0 0 0 0 1 ------------------------------------------------------------------------------- Address 93: LT3 Immo Labels: 2E0-905-865-93.clb Part No SW: 2E0 905 843 C HW: 906 900 590 2 Component: IMMO 1231 1322 Revision: 00231000 Serial number: VWXDZ0N1047149 Shop #: WSC 00000 000 00000 VCID: 275A456E966BC9BE6A-8072 1 Fault Found: 01176 - Key 008 - Implausible Signal - Intermittent ------------------------------------------------------------------------------- Address 94: LT3 Airbag Part No HW: 9069005701 Shop #: WSC 00117 555 00000 ASAM Dataset: 3 3332 ROD: CRFT_AB_3_3331.rod (*) VCID: 55A63FA634878B2E08-8000 No fault code found. ------------------------------------------------------------------------------- Address 96: LT3 Instruments Part No SW: 9069026601 HW: 9069014501 Shop #: WSC 00000 000 00000 ASAM Dataset: 32 1056 ROD: CRFT_KOMBI_32_1056.rod VCID: 071A25EEBEABE9BE4A-8052 1 Fault Found: 9100 - Drivetrain CAN: No communication Test Complete - Stored ------------------------------------------------------------------------------- Address 99: LT3 Ign. Switch Part No HW: 9069005902 Shop #: WSC 00000 000 00000 ASAM Dataset: 67 259 ROD: CRFT_EZS_67_259.rod VCID: 55A63FA634878B2E08-8000 No fault code found. ------------------------------------------------------------------------------- Address 9A: LT3 Central Locks Labels: 2E0-905-865-9A.clb Part No SW: 2E0 905 843 C HW: 906 900 590 2 Component: HF-FFB 1231 1322 Revision: 00231000 Serial number: 12345678901234 Shop #: WSC 00000 000 00000 VCID: 275A456E966BC9BE6A-8072 1 Fault Found: 00171 - Key 1 not learned 000 - - - Intermittent ------------------------------------------------------------------------------- Address 9B: LT3 Driver Door Part No HW: 9069000501 Shop #: WSC 00000 000 00000 ASAM Dataset: 33 263 ROD: CRFT_FTUHR_33_263.rod VCID: 55A63FA634878B2E08-8000 No fault code found. ------------------------------------------------------------------------------- Address B4: LT3 Central Elec. Part No SW: 9069024301 HW: 9069014500 Shop #: WSC 00000 000 00000 ASAM Dataset: 33 852 ROD: CRFT_EZE_33_851.rod (*) VCID: 020C34FA9589CC961D-8056 2 Faults Found: 90C1 - Emergency light activated; rotary light switch: implausible condition Test Complete - Stored 90C2 - Emergency light activated; for rotary light switch evaluation: voltage not correct Test Complete - Stored ------------------------------------------------------------------------------- Address B6: LT3 Steering Wheel Part No SW: 9065402545 HW: 9065402545 Shop #: WSC 00000 000 00000 ASAM Dataset: 72 257 ROD: CRFT_SML_72_257.rod (*) VCID: 081826D2B3B5E6C643-805C No fault code found. End-------------------------(Elapsed Time: 02:34)-------------------------- |
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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I'd be checking the wiring from pump to ecu - as above.
The pump running means you have 12v and ground but there may not be a signal to the ecu. TT
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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I'm getting 3.5V at the connection, along with 12V and ground. So I think the ecu is connected to the pump?
But yes I'll try to trace the wiring back to the ecu. VW want 108 quid to just do a diagnostic scan:-( which will probably tell me what I already know "open circuit to auxiliary water pump"
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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Yeah, sorted at last😊
I took a chance and bought another pump. A Pierbourg one, which is the original fitment.
Code reset, stop start working, no limp home. Now to try and get my £105 back from the local motor factors for the junk First Line branded one.
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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You've been unlucky with the pump fior sure - I'd seen some warnings about cheap chinese ebay ones but I woukd have expected bettter from a decent size outfit.
Still I'm glad I usually fit original or good OEM. Pierburg should be spot on. Glad it works now. TT
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RussG
Newbie Joined: 07 Jul 20 Location: Trefonen, Shrop Status: Offline Points: 9 |
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I'd found a few threads which had exactly the same symtoms but no one had actually finished the thread with an outcome. But I had also found the odd one with aftermarket stuff not being recognised by the ecu. I broke my own rule (trying to get it sorted quickly) by not getting oem or dealer parts for this sort of stuff.
Lesson learnt
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