Mass Air Flow Sensor - Rerouting Wiring Harness
Section2
Group
23
No.
0010
Year
98
Month
04
Reference:
TP 2306202, Section 2(23, 26) Engine management system Motronic 4.4; 850 (B5254T) 1997-
Vehicles involved:
Engines with Turbo (engine codes 52, 53, 56)
Service Campaign 83C:
Mass Air Flow (MAF) sensor connector
Background:
The MAF wiring harness should be attached and routed according to the information to minimize an open circuit and/or high electrical resistance.
Model:
M/Y 98 (as indicated by (W) in the VIN)
Volvo S70/V70/C7O Turbo versions.
Material:
Part Part number Quantity
tie strap 948211-8 1
Mass Air Flow (MAF) sensor connector
Mass Air Flow (MAF) sensor connector
1
Change fusebox location
Slacken off the two nuts holding the fusebox bracket a few turns.
Press the fusebox backward and towards the left side of the car.
Tighten nuts to 25 Nm (18.4 ft. lbs).
2
Disconnect connector
- Disconnect connector
- Disconnect/connect connector 3 times to remove oxide layer on the mating surface.
- Check that no terminals have been backed out of the connector and they are undamaged.
3
Lubricate the connector
Check terminals if they are greased.
Add grease only if it is missing.
Use low temperature grease. 0.5 gram/car. Make sure that no dint is introduced with the grease.
4
Secure the cable harness to the mass air flow (MAF) sensor
Position cable with an 18 mm (23/32") diameter loop (B), so that it is not putting stress on the connector (check with calipers).
Hold the cable in the position it is to be fixed and check that the cable is not stretched.
If the cable is stretched, position cable on the other side of the turbocharger control valve (TCV) hoses which are under the MAF sensor.
Install tie strap (A) (P/N 948211-8) as illustrated.
5
Check
- Check that the clearance between MAF connector and fuse is 3.2 mm (1/8") or more.
- Check that the fresh air intake is properly secured on the turbo charger (TC). If necessary tighten clamp.