Wires With Diameter Up To 0.35 Mm 2, Repairing
Special tools and workshop equipment required
- Crimping pliers, complete -VAS 1978/1 A-
- Exchange head, 0.35mm1/2 - 2.5mm1/2 -VAS 1978/1-1-
When repairing wires with a cross-section up to 0.35 mm2 , new contacts must always be crimped on using Crimping Pliers of JPT Contacts -VAS 1978/9A-, or Crimping Pliers (Base Tool) -VAS 1978/1-2- with Head Adapter for JPT Contacts -VAS 1978/9-1- installed. Due to the low current strengths of these wires in the micro- to milli- range, contacts crimped on incorrectly lead to continuity resistances and cause malfunctions or failure of the respective system. The most frequent applications of these contacts are:
- Heated oxygen sensor (HO2S)
- Speed (RPM) sensor
- Mass Air Flow (MAF) Sensor
By using Crimping Pliers of JPT Contacts -VAS 1978/9A- or Crimping Pliers (Base Tool) -VAS 1978/1-2- with Head Adapter For JPT Contacts -VAS 1978/9-1- installed, correct connection between crimp contact, wire and single wire seal is guaranteed. The tool is to be used only for the purpose described.
Contacts in a normal and a gold-plated version are crimped onto repair wires. The same version of the contact that was installed at the factory must always be used for repairs.
Crimping A New Contact With Single Wire Seal
-- Insert exchangeable head for JPT contact -VAS 1978/9-1- into crimp pliers (basic tool) -VAS 1978/1-2-. Refer to CRIMPING PLIERS VAS 1978/1A .
-- Place the single wire seal onto the repair wire.
When doing this, the smaller diameter of single wire seal must be facing in the direction of the contact to be crimped on.
-- Open crimp pliers and place the repair wire end into stripping slot of crimp pliers.
-- Close crimp pliers completely.
-- Open crimp pliers again and remove the stripped wire end.
-- Slide single wire seal in direction of stripped wire end until it rests flush with the wire insulation.
-- Place new crimp contact into mount on crimp pliers.
-- Insert the stripped wire end with positioned single wire seal into crimp contact until it makes contact on "wire stop".
-- Crimp the contact, wire and single wire seal by closing crimp pliers completely.
-- Open crimp pliers again and remove the finished crimped-on contact.
A correctly performed crimp is distinguished by a clean compression of wire and single wire seal in the contact and has an impression on the rear side which identifies that the crimp was performed by a professional using the correct tool.