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1 Telephone: Fax: VAT Registration No.: Terminal side Wire side Component/circuit description ECM pin Signal Condition Typical value Oscilloscope setting (Suggested settings - Voltage/time per division) Wave form AC compressor clutch relay 54 Engine idling - AC ON AC compressor clutch relay 54 Engine idling - AC ON - accelerator pedal briefly fully depressed 0-1 V briefly Air conditioning 10 Engine idling - AC OFF Air conditioning 10 Engine idling - AC ON - AC compressor ON Battery 1 Ignition OFF Brake pedal position (BPP) Ignition ON - brake pedal released Brake pedal position (BPP) 18 Ignition ON - brake pedal depressed Crankshaft position (CKP) - without integral 56 Engine idling 45 Hz Crankshaft position (CKP) 56 Engine idling 5 V/20 ms Data link connector (DLC) 1 Data link connector (DLC) 48
2 Digital multifunction display Earth 20 Ignition ON Earth 40 Ignition ON Earth 49 Ignition ON Earth 60 Ignition ON Earth - brown wire 28 Ignition ON Earth - some models 5 Ignition ON Earth - without integral 16 Ignition ON Engine control relay 3 Ignition OFF Engine control relay 3 Ignition ON Engine control relay 5 Ignition OFF Engine control relay 5 Ignition ON Engine control relay Ignition ON 0-1 V briefly then V Engine control relay 22 Engine cranking 0-1 V temp. 0 C 3,8-3,9 V temp. 20 C 3-3,2 V temp. 80 C 0,6-0,9 V Ignition ON 49 Ignition ON - valve not Engine under load - engine hot - valve 3-14 V Ignition ON Engine running - valve 1/50 ms backpressure transducer - if fitted 26 Ignition ON 5 V backpressure transducer 2 Ignition ON 0,4-3,9 V - varies with pressure backpressure transducer 46 Ignition ON - if fitted Accelerate briefly - engine hot 9-14 V Ignition ON Engine running - valve 5 V/20 ms Fuel flow Fuel pump relay Ignition ON 0-1 V briefly then V Fuel pump relay 22 Engine cranking 0-1 V
3 Heated oxygen (HO2S) Heated oxygen (HO2S) - LH Heated oxygen (HO2S) - RH Heated oxygen s (HO2S) - 4-wire 29 0,1-0,9 V fluctuating 0,2 V/1 sec. 43 0,1-0,9 V 0,2 V/1 sec. 29 0,1-0,9 V 0,2 V/1 sec. 46 Heated oxygen s (HO2S) 49 Idle adjustment connection - blue/yellow wire 28 Ignition ON or 5 V Idle air control (IAC) valve 21 9,5-11 V 2 V/5 ms Ignition amplifier 36 Engine idling 45 Hz 2 V/10 ms Ignition amplifier - with integral 16 Ignition ON Ignition amplifier 56 Engine idling 45 Hz 5 V/20 ms Injectors - group A 58 Ignition ON Injectors 58 Engine idling 2,3 ms 1/2 ms Injectors - group B 59 Ignition ON Injectors 59 Engine idling 2,3 ms 1/2 ms 0 C 3,8-3,9 V 20 C 3-3,2 V 40 C 2-2,2 V Ignition ON 49 Ignition ON 26 Ignition ON 5 V 45 Ignition ON 10 Hz 45 Engine idling - engine cold 120 Hz Hz rpm 105 Hz 46 Ignition ON 49 Ignition ON Octane coding plug - if fitted 23 Ignition ON or 5 V Octane coding plug 24 Ignition ON or 5 V Ignition start position - AT not in P or N Ignition start position - AT in P or N - engine cranking 0-1 V Ignition ON - AT not in P or N
4 Ignition ON - AT in P or N 0-1 V (PAIR) - some models Engine idling - engine cold 9-14 V (PAIR) 51 (PAIR) 51 Ignition ON Throttle position (TP) 26 Ignition ON 5 V Throttle position (TP) 46 Ignition ON Throttle position (TP) 4 Throttle position (TP) 4 Ignition ON - throttle closed Ignition ON - throttle fully open 0,5-0,9 V 4,3-5 V Throttle position (TP) Ignition ON Transmission kick-down relay/ Ignition ON - accelerator pedal released Transmission kick-down relay/ 19 Ignition ON - accelerator pedal fully depressed Transmission modulator 53 Ignition ON 9-12 V Transmission modulator Ignition ON 9-12 V Vehicle speed (VSS) 3 Ignition ON - vehicle pushed or Vehicle speed (VSS) 3 Vehicle moving 5 V/50 ms 4. Digital, DC, frequency modulated 20. Digital, DC, pulse width modulated or digital, DC, frequency modulated 21. Analogue, DC
5 29. Digital, DC, pulse width modulated or digital, DC, frequency modulated 32. Digital, DC, frequency modulated 35. Digital, DC, pulse width modulated 43. Digital, DC, frequency modulated input/output signal input signal output signal ECM ed earth ECM earth circuit
Telephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: Name: Manufacturer: Ford Address: Model: Scorpio Year: 1991 Registration: Tel - Private: Tel - Business: Mileage: Job number: Terminal side Wire side Component/circuit
Telephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: Name: Manufacturer: Ford Address: Model: Year: 1994 Registration: Tel - Private: Tel - Business: Mileage: Job number: Terminal side Wire side Component/circuit description
Telephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: Terminal side Wire side Component/circuit description ECM pin Signal Condition Typical value Oscilloscope setting (Suggested settings - Voltage/time per division)
Telephone: Fax: VAT Registration No.:
Telephone: Fax: VAT Registration No.: K143 AC compressor clutch relay X88 AC connector S63 AC refrigerant pressure switch S341 AC refrigerant triple pressure switch A16 Anti-lock braking system (ABS) control
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