Hi all Ive been having some trouble with my 05 plate mk5 Gti it all started on saturday, i drove home to pick my misses up, when i went to re-start the car it just cranked over. checked codes on VCDS - not codes. after a few mins looking i found a 20 amp fuse blown in the under bonnet fuse/relay box next to the battery. i fitted a new fuse and turned the engine over and she fired up but on 3 cylinders, shortle followed by some smoke from number 4 coil pack. the coil pack shorted to positive and had a small melt down and melted the plug slightly on no4. confident i just needed to replace the coil pack and plug i ordered a set of coils, plugs and dug a spare plug out of the garage and replaced the melted item. once fitted i cranked the engine - but she wouldnt fire. i plugged in VCDS again and to my annoyance the code; 001672 ECM power relay load circuit (J271)- P0688 -004 - open circuit had shown up when the key is turned to ignition on. i headded out to GSF with the 3 under bonnet relays in hand and managed to get hold of the furthest from the battery and the black one in the middle of the box (i dont know what ones they are) but the 5 pin one closest tot he battery was unavailable. i cranked the engine again but no joy. - still the same code. i bridged the two big terminals on the far relay from the battery (already replaced) and the trouble code then went when ignition was on. thinking i'd cracked it i cranked again and the following TC's came up 008521 supply voltage for fuel injector group B p2149 - 002 - OPEN CIRCUIT 012423 - voltage supply relay for engine components p3087 - 004 -electrical malfunction 008521 - supply voltage for fuel injector group B p02149 - 002- open circuit 008518 - supply voltage for fuel injector group A p2146 - 002 - 0pen circuit Ive googled the fault etc but i cane seem to find anyone who has managed to repair this fault? Can anyone help me please!!!
Right - i have some progress today, hopefully if i write this all up start to finish it will be of help to others in future!!! The VCDS print out as promised: Chassis Type: 1K0 Scan: 01 02 03 08 09 15 16 17 19 25 42 44 46 52 55 56 62 72 76 VIN: WVWZZZ1KZ6W006626 Mileage: 101280km/62932miles Address 01: Engine Labels: 06F-907-115-AXX.lbl Part No SW: 1K0 907 115 A HW: 1K0 907 115 A Component: 2.0l R4/4V TFSI G00 0070 Revision: --H01--- Serial number: VWZ7Z0E2157244 Coding: 040300031C070160 Shop #: WSC 00581 210 83422 VCID: 244DC102E7B8EB3865D 3 Faults Found: 001672 - ECM Power Relay Load Circuit: (J271) P0688 - 004 - Open Circuit Freeze Frame: Fault Status: 01100100 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 19:33:51 Freeze Frame: RPM: 0 /min Load: 0.0 % Speed: 0.0 km/h Temperature: 3.0C Temperature: 5.0C Absolute Pres.: 990.0 mbar Voltage: 0.000 V 008518 - Supply Voltage for Fuel Injector Group A P2146 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 19:37:31 Freeze Frame: RPM: 203 /min Load: 88.6 % Speed: 0.0 km/h Temperature: 3.0C Temperature: 5.0C Absolute Pres.: 990.0 mbar Voltage: 7.620 V 008521 - Supply Voltage for Fuel Injector Group B P2149 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 19:37:31 Freeze Frame: RPM: 220 /min Load: 87.4 % Speed: 0.0 km/h Temperature: 3.0C Temperature: 5.0C Absolute Pres.: 990.0 mbar Voltage: 10.541 V Readiness: 0110 0101 I only get 001672 (P0688) before cranking the engine at which point i also get the injector DTC's in the system also. (SEE READOUT BELOW) I replaced relays 1,2 & 4 in the under bonnet fuse box hoping one was the ECM (J271 relay) but this changed nothing. If i bridge relay terminals 30 & 87 of R4 as labeled in the box (or A4 by the diagram below) then i dont get DTC P0688 however its replaced with a new code (bridged relay print out below) Address 01: Engine Labels: 06F-907-115-AXX.lbl Control Module Part Number: 1K0 907 115 A HW: 1K0 907 115 A Component and/or Version: 2.0l R4/4V TFSI G00 0070 Software Coding: 040300031C070160 Work Shop Code: WSC 00581 210 83422 VCID: 244DC102E7B8EB3865D 5 Faults Found: 012423 - Voltage Supply Relay for Engine Components P3087 - 004 - Electrical Malfunction Freeze Frame: Fault Status: 01100100 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 04:14:07 Freeze Frame: RPM: 221 /min Load: 84.7 % Speed: 0.0 km/h Temperature: 5.0C Temperature: 7.0C Absolute Pres.: 990.0 mbar Voltage: 10.287 V 008521 - Supply Voltage for Fuel Injector Group B P2149 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 04:14:07 Freeze Frame: RPM: 276 /min Load: 76.4 % Speed: 0.0 km/h Temperature: 5.0C Temperature: 7.0C Absolute Pres.: 990.0 mbar Voltage: 2.032 V 008518 - Supply Voltage for Fuel Injector Group A P2146 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 04:14:07 Freeze Frame: RPM: 276 /min Load: 76.4 % Speed: 0.0 km/h Temperature: 5.0C Temperature: 7.0C Absolute Pres.: 990.0 mbar Voltage: 11.557 V 008521 - Supply Voltage for Fuel Injector Group B P2149 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 04:14:07 Freeze Frame: RPM: 592 /min Load: 68.6 % Speed: 0.0 km/h Temperature: 5.0C Temperature: 6.0C Absolute Pres.: 990.0 mbar Voltage: 10.922 V 008518 - Supply Voltage for Fuel Injector Group A P2146 - 002 - Open Circuit Freeze Frame: Fault Status: 01100010 Fault Priority: 0 Fault Frequency: 1 Mileage: 101287 km Time Indication: 0 Date: 2000.00.00 Time: 04:14:07 Freeze Frame: RPM: 592 /min Load: 66.6 % Speed: 0.0 km/h Temperature: 5.0C Temperature: 6.0C Absolute Pres.: 990.0 mbar Voltage: 12.192 V Readiness: 0110 0101 Just to cover all bases, fuses 6,9,10,11,12 only recieve 0.54 volts untill i bridge the relay at which point they recieve battery voltage. on the relay i have battery voltage at pin 30 and continuity from pin 87 to the relivant fuses. Pin 86 has battery voltage which so far is all correct. however pin 85 has 3.45 volts which i think is wrong? - (WIRING DIAG BELOW) in the morning im going to pull out the ecu and check continuity from pin 69 on the ecu plug to pin 85 on the relay but from that point im a little stuck. im kind of hoping someone will turn around and tell me im an idiot and i need to replace some random relay or tell me how they have resolved this issue before?? im also asuming at this point that the injector codes are linked to the relay fault as they seem to take power direct from the ECU? as ever any help is appreciated, i have this on 4 forums at the moment and not one bit of help so far thanks all
Hi There I have the exact problem with same symptoms on my Mk5 Gti. Can you explain to me what you did to fix the problem.
