IF 1(86) does not follow 3/31 pin 7 religiously. You got an intermittent open in 15/31, C14:6, GN-R or 54/3LC.
Place the positive lead of the voltmeter at 3/31 pin 7, the negative lead at 1(86). Crank, the voltage should be 0V if it jumps to 14.2V you got a intermittent open.
Most probable cause is the junction of Electrical distribution 15/31 and Connector C14:6.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.