Land Rover Engine Management Systems Rover Manual
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13/14CU AND 14CUX SYSTEMS 13/14CU and 14CUX Systems 99 The screen below provides you with an example of the information available under the icon LAMBDA BANK B. (Lambda is another term for oxygen sensor.) This is an example of how TestBook allows you to monitor sensor operation as the engine is operating. Information is provided on the screen to help you determine if the component is operating within specified parameters. This screen is also helpful in verifying operation following a repair.
13/14CU AND 14CUX SYSTEMS 100 13/14CU and 14CUX ECM Connector Pin-Outs 1987-88 Lucas 13 CU ECM PIN WIRE COLORFUNCTION PIN WIRE COL- ORFUNCTION 1 RG Stepper “D” 21 YU A/C clutch input 2 NO Battery + Main Relay 22 UR AFM Idle trim 3 Y TPS Reference voltage 23 U Lambda Bank “A” 4 B Lambda ground 24 U Lambda Bank “B” 5 NP (1987) Rear Screen input (1988) N.C.25 RB Sensor “VE” 6 Y Vehicle Speed input 26 GW Stepper “C” 7 GU Water Temperature input 27 BS Signal Ground 8 - 28 US Stepper “B” 9 WLG Serial Link 29 O Stepper “A” 10 BY “EFI” Light (MIL) 30 - 11 YW Bank “B” injector ground 31 - 12 UR Main Relay Request 32 SW Fuel Temperature input 13 YU Bank “A” injector ground 33 - 14 B ECM Ground 34 OB Park/Neutral input 15 N Battery + 35 UG AFM input 16 UP Fuel Pump Relay Request 36 - 17 - 37 WY Serial Link 18 WK Serial Link 38 - 19 WS Ignition “ON” input 39 WB Tachometer input 20 R TPS input 40 B ECM ground
13/14CU AND 14CUX SYSTEMS 13/14CU and 14CUX Systems 101 1989 Lucas 14 CU ECM PIN WIRE COLORFUNCTION PIN WIRE COL- ORFUNCTION 1 RG Stepper “D” 21 YB A/C clutch input 2 NO Battery + Main Relay 22 UR AFM Idle trim 3 Y TPS Reference voltage 23 U Lambda Bank “A” 4 B Lambda ground 24 U Lambda Bank “B” 5 BW A/C Fan Switch Input 25 RB Sensor Signal Ground 6 Y Vehicle Speed input 26 GW Stepper “C” 7 GU Water Temperature input 27 BS Ground 8 PY Heated Front Screen input 28 US Stepper “B” 9 WLG Serial Link 29 O Stepper “A” 10 BY “EFI” Light (MIL) 30 - 11 YW Bank “B” injector ground 31 - 12 UR Main Relay Request 32 SW Fuel Temperature input 13 YU Bank “A” injector ground 33 BS A/C clutch output 14 B ECM Ground 34 OB Park/Neutral input 15 N Battery + 35 UG AFM input 16 UP Fuel Pump Relay Request 36 BG Fan Timer Request 17 SY Purge Control 37 WY Serial Link 18 WK Serial Link 38 - 19 WS Ignition “ON” input 39 WB Tachometer input 20 R TPS input 40 B ECM ground
13/14CU AND 14CUX SYSTEMS 102 1990-95 Lucas 14 CUX ECM C243 Heated Oxygen Sensor X139, X160 PIN WIRE COLORFUNCTION PIN WIRE COL- ORFUNCTION 1 RG Stepper “D” 21 YB A/C clutch input 2 NO Battery + Main Relay 22 UR AFM Idle trim 3 Y TPS Reference voltage 23 U Lambda Bank “A” 4 B Lambda ground 24 U Lambda Bank “B” 5 BW Tune Resistor (1990 only) 25 RB Sensor “VE” 6 Y Vehicle Speed input 26 GW Stepper “C” 7 GU Water Temperature input 27 BS Signal Ground 8 PY Heated Front Screen input 28 US Stepper “B” 9 WLG Serial Link 29 O Stepper “A” 10 BY “Check Engine” Light (MIL) 30 K Fault Display output 11 YW Bank “B” injector ground 31 BG Diagnostic Reset 12 UR Main Relay Request 32 SW Fuel Temperature input 13 YU Bank “A” injector ground 33 BS A/C Clutch output 14 B ECM Ground 34 OB Park/Neutral input 15 N Battery + 35 UG AFM input 16 UP Fuel Pump Relay Request 36 BG Fan Timer Request 17 SY Purge control 37 - 18 WK Serial Link 38 NK Fault Clock output 19 WS Ignition “ON” input 39 WB Tachometer input 20 R TPS input 40 B ECM ground
13/14CU AND 14CUX SYSTEMS 13/14CU and 14CUX Systems 103 3way-Black Throttle Position Sensor X171 3way-Black PIN WIRE COL- ORFUNCTION 1.00 WO Heater Power Supply- 12v 2.00 U Sensor Signal- 0.1v to 1.1v 3.00 B Ground PIN WIRE COL- ORFUNCTION 1.00 RB Signal Ground 2.00 R Sensor Signal 3.00 Y TPS Reference voltage- 5v 12 3 12 3
13/14CU AND 14CUX SYSTEMS 104 14CUX ECM Tune Summary Note:When using Tune # R3652, R3653, or R3654 to correct cold start complaints, the entire “Cold Start Enhancement” package must also be used (except Defender 110) See reverse for complete tune listing. Tune ACpplication R3652 3.9 litre ‘93-‘95 MY Range Rover Classic 3.9 litre ‘93-‘95 MY Discovery R3653 4.2 litre ‘93-‘95 MY Range Rover Classic R3654 3.9 litre ‘94-‘95 MY Defender 90 3.9 litre ‘93 MY Defender 110 R3362 3.9 litre ‘89-‘92 MY Range Rover Classic Low compression
13/14CU AND 14CUX SYSTEMS 13/14CU and 14CUX Systems 105 Model Tune # Description Range Rover Classic 3.9 Low CR R2103 Initial production tune Range Rover Classic 3.9 Low CR R2161 Desensitized OBD, IAC refinements Range Rover Classic 3.9 Low CR R2306 Fixed A/C glitch @ 65 mph (2250rpm); eliminated tune resistor (Code 21) Range Rover Classic 3.9 Low CR R2419 Desensitized OBD, , prinarily Code 48; Service Actioon (Recall CA) Range Rover Classic 3.9 Low CR R2665 Improved IAC control, new strategy for IAC OBD; further OBD desensitization Range Rover Classic 3.9 High CRR2813 Initial production tune Range Rover Classic 4.2 High CR R2926 BInitial production tune Defender 3.9 High CR R3038 Initial production tune Range Rover Classic 3.9 High CR R3100 Low Reed Vapor Pressure fuel tune Range Rover Classic 4.2 High CR R3102 Low Reed Vapor Pressure fuel tune Range Rover Classic 3.9 High CR R3315 MIL on no code fix (interim) Range Rover Classic 4.2 Low CR R3316 MIL on no code fix (interim) Range Rover Classic 3.9 Low CR R3326 Low Reed Vapor Pressure fuel tune (interim) Range Rover Classic 3.9 Low CR R3339 MIL on no code fix (interim) Defender 3.9 High CR R3340 MIL on no code fix (interim) Defender 3.9 High CR R3341 Low Reed Vapor Pressure fuel tune (interim) Range Rover Classic 3.9 High CR R3342 AMIL on no code fix (interim) Range Rover Classic 4.2 High CR R3343 AMIL on no code fix (interim) Range Rover Classic/ Discovery 3.9 High CR R3360 Desensitized OBD 95 MY Tune (‘94 Discovery) Range Rover Classic 4.2 R3361 Desensitized OBD 95 MY Tune Range Rover Classic 3.9 Low CR R3362 Desensitized OBD 95 MY Tune; improvements for Low CR
13/14CU AND 14CUX SYSTEMS 106 Defender 3.9 High CR R3365 Desensitized OBD 95 MY Tune Range Rover Classic 4.2 R3507 Part # PRM3361A; Interim improved Cold Start, fueling below - 22âC (- 10âF) Range Rover Classic/Discovery 3.9 High CR R3526 Part # PRM3360A; Note: LR Part numbers are different from Tune numbers Defender 3.9 High CR R3529 Part # PRM3365A Range Rover Classic/Discovery 3.9 High CR R3652 Operation Pride Tune Current tune with final improved Cold Start fueling below -22âC (-10âF). Range Rover Classic 4.2 High CRR3653 Operation Pride Tune Current tune with final improved Cold Start fueling below -22âC (-10âF). Defender 3.9 High CR R3654 Operation Pride Tune Current tune with final improved Cold Start fueling below -22âC (-10âF).