1999- C/S/V70 Troubleshooting Coil 30713416 with ETM system ME7

Post by **abscate** » 27 Apr 2014, 18:55

Keywords coil on plug pin assignments

Volvo part number 30713416

Quick post on troubleshooting the 'coil pack' system used on later P80 models - these cars have a coil over each cylinder and no distributor.

Removing coils - see pix below

Coil Pinouts and Measurements

1 Signal in from ECU ( coils re fired individually by the ECU grounding this pin)
2 Ground on trigger transistor
3 Ground on HV line
4 12 VDC supply.

I measured all pins INF Ohms on MOHM scale except

Pin 1-3 = 852 Ohms

Post by **abscate** » 13 Aug 2015, 08:51

View of the coil system on ME7 cars

Coils are always 12 VDC hot to pin 4 when Ignition is on.
ECU grounds coil on command at pin 1 for each coil independently.

Its important to have the M6 (10 mm) bolt tight to ground these well.

Post by **Kazthebassman** » 19 Dec 2015, 13:11

Can anyone tell me where pin 5 on the ETM terminates. I know it is at ground potential with ignition on but I would like to know where it actually lands. It appears the ECM may be turning on the ETM by supplying ground to pin 5 of the ETM.
I see it's destination is designated "31/91" on this diagram. My problem is intermittent so simple voltage measurements may not suffice.

Post by **abscate** » 20 Dec 2015, 03:30

31/91 is the designation for the connector for pin 5 ETM. Note on your car the connector will be buried under the intake manifold, not on the back left as indicated on the diagrams.

I think that is as permanent ground and Is not switched by the ETM

Post by **abscate** » 01 Jan 2018, 13:32

Adding Complete circuit per Alldata to complete info