Land Rover 3.0L V6 SC AJ 126 ENGINE MANAGEMENT SYSTEM ON BOARD DIAGNOSTIC Manual PDF

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Land Rover 3.0L V6 SC AJ 126 ENGINE MANAGEMENT SYSTEM ON BOARD DIAGNOSTIC Manual – PDF DOWNLOAD

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Land Rover 3.0L V6 SC AJ 126 ENGINE MANAGEMENT SYSTEM ON BOARD DIAGNOSTIC Manual – PDF DOWNLOAD

Language : English
Pages : 167
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:

Land Rover 3.0L V6 SC AJ 126 ENGINE MANAGEMENT SYSTEM ON BOARD DIAGNOSTIC Manual – PDF DOWNLOAD

1 Engine started and running7
11 Engine Start – System Flowchart 7
2 Engine Cylinder Numbering and Firing Order 8
3 Catalyst Monitoring 9
31 Fault Codes 9
32 System Overview 9
33 Strategy Description 10
331 Oxygen Storage Capacity (OSC) and catalyst efficiency evaluation 10
332 Diagnosis constraints 10
333 Failure Criterion 10
34 Catalyst Monitor Diagnosis – System Flowchart and Tables 11
35 Drive Cycle Information 14
4 Misfire Monitoring15
41 Fault Codes 15
42 System Overview 15
43 Strategy Description 16
431 Introduction 16
432 Recording segment time and position, and its manipulation 16
433 Adjustment of crank angle tolerance/engine roughness values 16
434 Storing adaption values in back-up memory 17
435 Misfire ‘signal’ calculation and misfire judgement 18
436 Catalyst damage judgement 20
437 Excess emissions judgement 20
438 Monitor execution check 21
439 Rough road 21
44 Misfire Monitor – System Flowchart and Tables 22
5 Evaporative System Monitoring 24
51 Fault Codes 24
52 System Schematic 25
53 System Description 26
54 Fault Determination 27
541 Reference Leak Measurement 27
542 Tank Measurement 28
543 Fault Assessment 28
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5431 Small Leak / Rough Leak (> 0040 inch) 29
5432 Very Small Leak (0020 inch) 30
5433 Fuel Cap Warning Message 31
5434 Filler Cap Removal and Re-Fueling 31
55 Evaporative System Monitoring – System Flowchart and Tables 32
56 Diagnosis Frequency and MIL Illumination 35
57 Drive Cycle Information 36
6 Purge Valve Monitoring37
61 Fault Codes 37
62 System Schematic 37
63 System Description 38
64 Fault Determination 38
641 Reference Leak Measurement 38
642 Purge System Measurement 38
643 Fault Assessment 39
6431 CPV stuck open 39
6432 CPV stuck closed or purge lines are blocked 39
65 Purge Flow Monitoring – System Flowchart and Tables 40
7 Fuel System Monitoring 43
71 Fault Codes 43
72 System Description 43
73 Fuel System Monitoring – System Flowchart and Tables 45
74 Fuel Injector Monitoring Tables 55
8 UHEGO Sensor Monitoring57
81 Fault Codes 57
82 System Overview 57
83 ‘UHEGO Sensor Ready’ Conditions 57
84 Sensor Heater Control 58
841 Valid sensor resistance has been measured 58
842 Dew point assessment 59
85 Heater Diagnostics 59
851 Heater Powerstage/control circuit analysis 59
852 Heater Control Diagnosis 59
853 Heater Influence on Nernst Cell 59
86 Signal Diagnostics 60
861 Integrated Circuit (IC) Electrical monitoring 60
862 UHEGO Signal Diagnostics – System Flowchart 61
863 Sensor Dynamics 62
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864 UHEGO Sensor Dynamics – System Flowchart 64
87 UHEGO Sensor Monitoring Tables 65
88 Drive Cycle Information 71
9 HEGO (LSF AND LSH) Sensor Monitoring71
91 Fault Codes 71
92 System Overview 73
93 ‘HEGO Sensor Ready’ Conditions 73
94 Sensor Heater Control 73
95 Heater Diagnostics 73
951 Heater power stage monitoring 73
952 Heater monitoring 74
953 HEGO Heater Monitor – System Flowchart 74
96 Signal Diagnostics 74
961 Electrical monitoring 74
962 HEGO Electrical Monitoring – System Flowchart 75
963 HEGO Sensor dynamics 76
9631 Delayed response 76
9632 Transient response 76
9633 Range or signal stuck 76
9634 Delayed response – System Flowchart 77
9635 Transient response – System Flowchart 78
9636 Range or signal stuck – System Flowchart 79
97 HEGO (LSF AND LSH) Sensor Monitoring Tables 80
98 Drive Cycle Information 84
10 Individual Cylinder AFR Monitor 88
101 Fault Codes 88
102 System Description 88
103 Fault Decision 88
104 Individual Cylinder AFR Monitor – System Flowchart and Tables 89
11 Engine Cooling System – Thermostat Monitoring91
111 System Schematic 91
112 System Description 92
113 Typical Time to Detection for a failed Thermostat during Normal Driving 93
114 Thermostat Monitoring – System Flowchart and Tables 94
12 Comprehensive Component Monitoring 96
121 Intake Air Temperature Sensor Monitor 96
1211 Schematic 96
1212 Super Charged Variants 97
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12121 TMAP/TFA1 (Post intercooler) Intake Air Temperature Sensor Monitor 97
121211 Fault Codes 97
121212 Electrical Monitor 97
121213 Rationality Monitor 98
121214 Cold Start Monitor 98
121215 TFA1 Monitoring – System Flowchart (SC Variant) 99
12122 TFA2 (Pre-Throttle) Intake Air Temperature Sensor Monitor 100
121221 Fault Codes 100
121222 Electrical Monitor 100
121223 Rationality Monitor 100
121224 Cold Start Monitor 100
121225 TFA2 Monitoring – System Flowchart 101
12123 TFA3 (Supercharger out) Intake Air Temperature Sensor Monitor 102
121231 Fault Codes 102
121232 Electrical Monitor 102
121233 Rationality Monitor 102
121234 Cold Start Monitor 102
121235 TFA3 Monitoring – System Flowchart 103
1213 Intake Air Temperature Sensor Monitoring Tables 104
122 Mass Airflow Sensor Monitors 108
1221 Fault Codes 108
12221 Electrical check 109
12222 Cross Flow Compensation Range and Plausibility Check 109
12223 MAF Monitoring – System Flowchart and Tables 111
123 Intake Pressure Sensor Monitors 115
1231 Super Charged Variants 115
12311 TMAP Pressure Monitor 115
12312 Fault Codes 115
12313 Electrical Monitor 115
12314 Range Check, Rationality and Signal Monitor 115
12315 MAP/TMAP Monitoring – System Flowchart and Tables 117
1232 MAP Pressure Monitor – Pressure Downstream of Throttle 120
12321 Fault Codes 120
12322 Electrical Monitor 120
12323 Range Check, Rationality and Signal Monitor 120
1233 MAP/TMAP Monitoring – System Flowchart and Table 121
124 Coolant Temperature Sensor Monitor 123
1241 Fault Codes 123
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1242 Electrical Monitor 123
1243 Rationality Monitor 123
1244 Cold Start Monitor 123
1245 Coolant Sensor Monitor – System Flowchart and Tables 124
125 Radiator Out Temperature Monitor 127
1251 Fault Codes 127
1252 Range Monitor 127
1253 Rationality Monitor 127
1254 Radiator Out Temperature Monitor – System Flowchart and Tables 128
13 Additional Tables 131
131 Cold Start Emission Reduction Strategy Performance Tables 131
132 Barometric Pressure Sensor Monitoring Table 135
133 Idle Speed Control Monitoring Tables 136
134 Ambient Temperature Sensor Monitoring Table 137
135 Knock Sensor Monitoring Tables 139
136 Cam and Crankshaft Sensor Monitoring Tables 141
137 Ignition Coil Drive Monitoring Table 147
138 Variable Valve Timing 148
1381 Variable Valve Timing Monitoring Tables 148
1382 Variable Valve Timing Drive Cycle Information 150
139 Supercharger Control Valve Monitoring Table 151
1310 Network Managment Tables 152
1311 Vehicle Speed Determination Monitoring Table 154
1312 Sensor Supply Voltage and Main Relay Monitoring Table 154
1313 Accelerator Pedal Monitoring Table 155
1314 Throttle Monitoring Tables 156
1315 ECM Monitoring Table 158
14 Additional Information 160
141 Diagnostic Test Mode Compliance 160
142 Stored Engine Conditions – Mode$02 160
143 Communication of Monitor Test Results – Mode$06 161
144 Drawing and Location of the Malfunction Indicator Light 165
145 Location of the Data Link Connector 166

S.V 28/02/2025