Advanced Automotive Fault Diagnosis
particularly in after sales repairs. Note that the
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LÔØI NOÙI ÑAÀU, ledklok
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- Function: 31 ⫽ ground/earth S ⫽ additionally switched circuit System: AC ⫽ headlamp levelling Connection
particularly in after sales repairs. Note that the designations are not to identify individual wires but to define the terminals of a device. Listed below are some of the most popular numbers. 1 Ignition coil negative 4 Ignition coil high tension 15 Switched positive (ignition switch output) 30 Input from battery positive 31 Earth connection 49 Input to flasher unit 49a Output from flasher unit 50 Starter control (solenoid terminal) 53 Wiper motor input 54 Stop lamps 55 Fog lamps 56 Headlamps 56a Main beam 56b Dip beam 58L Left side lights 58R Right side lights 61 Charge warning light 85 Relay winding out 86 Relay winding input 87 Relay contact input (change over relay) 87a Relay contact output (break) 87b Relay contact output (make) L Left side indicators R Right side indicators C Indicator warning light (vehicle) The Ford Motor Company now uses a circuit numbering and wire identification system. This is in use worldwide and is known as Function, System-Connection (FSC). The system was devel- oped to assist in vehicle development and pro- duction processes. However, it is also very useful in helping the technician with fault finding. Many of the function codes are based on the DIN sys- tem. Note that earth wires are now black! The system works as follows. 31S-AC3A || 1.5 BK/RD Function: 31 ⫽ ground/earth S ⫽ additionally switched circuit System: AC ⫽ headlamp levelling Connection: 3 ⫽ switch connection A ⫽ branch Size: 1.5 ⫽ 1.5 mm 2 Colour: BK ⫽ black (determined by function 31) RD ⫽ red stripe The new Ford colour codes table is as follows: Ford system codes are as follows. Letter Main system Examples D Distribution systems DE ⫽ earth A Actuated systems AK ⫽ wiper/washer B Basic systems BA ⫽ charging BB ⫽ starting C Control systems CE ⫽ power steering G Gauge systems GA ⫽ level/pressure/ temperature H Heated systems HC ⫽ heated seats L Lighting systems LE ⫽ headlights 16 Advanced automotive fault diagnosis Code Colour BK Black BN Brown BU Blue GN Green GY Grey LG Light-green OG Orange PK Pink RD Red SR Silver VT Violet WH White YE Yellow M Miscellaneous systems MA ⫽ air bags P Power train control systems PA ⫽ engine control W Indicator systems WC ⫽ bulb failure (‘indications’ not turn signals) X Temporary for future XS ⫽ too much! features As a final point to this section it must be noted that the colour codes and terminal designations given are for illustration only. Further reference should be made for specific details to the manu- facturer’s information. tải về 7.07 Mb. Chia sẻ với bạn bè của bạn:
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