Here you will find OBD codes and diagnostic charts, as well as links to technical support sites.

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OBD Trouble Codes
Air Conditions
Toyota Hilux
About Batteries
Bosch KE3-Jetronic
Beginners’ Guide to Welding (1)
Beginners’ Guide to Welding (2)
Water Pump Testing
Using Relays
Common Rail Diesel Engine Management
Variable Valve Timing
Direct Petrol Injection
Sharpening Drill Bits
Detonation Detection (1)
Detonation Detection (2)
How Cars Work 101
A/C Conversion from R12 to R134a
Refrigerants R12 vs. R134a