Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual 1996 LEGACY RHD (RIGHT HAND DRIVE) SERVICE MANUAL SUPPLEMENT Troubleshooting Section MSA5T9603A29714
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2_7 [T501] ON-BOARD DIAGNOSTICS II SYSTEM
5. Specified Data
5. Specified Data
1 . ENGINE CONTROL MODULE (ECM) I/O SIGNAL
++u++u++u++u ++ ++
++~~
to B84
16 5 u 1 1 u 2 11 u 1 1 0 9 1 u u 1 8 1 7 1 u 1 6 1 5 1 u 1 4 1 31U 2 1
44 4 7 3 3 3 3 31 3 2 2 2 2 2 2 2 2 21 1 18 1 7
7 52 5B 7 4 2 1
85 84
161 u1 1 u 1 11 u 1 9 u u 8 7 u 6 5 u 4 3 2 1
4443~2~$Q 7 33 3231 322 2222 2 2121 1 1
7$9~8~7~6~5 1 7 43251 0 6
OBD0092A
Signal (V)
Connector Terminal
Content Ignition SW ON Note
No . No . Engine ON (Idling)
(Engine OFF)
Crankshaft Signal (+) 884 8 0 -7- +7 Sensor output waveform
position Signal (-) B84 29 0 0 -
sensor Shield B84 54 0 0 -
Camshaft Signal (+) B84 7 0 -7- +7 Sensor output waveform
position Signal (-) B84 28 0 0 -
sensor Shield B84 54 0 0 -
Mass air Signal B84 5 0-0 .3 0 .8- 1 .2 -
flow Shield B84 57 0 0 -
sensor GND B84 20 0 0 -
Fully closed : 0 .2 - 1 .0
Signal B84 6
Throttle Fully opened : 4 .2 - 4 .7
position Power B84 21 5 5 -
sensor supply
GND B84 20 0 0 -
Front Signal B84 23 0 0-0 .9 -
oxygen
sensor Shield B84 56 0 0 -
Rear Signal B84 24 0 0-0 .9 -
oxygen
sensor Shield B84 56 0 0 -
Engine coolant
BS4 22 1 .0-1 .4 1 .0-1 .4 After warm-up
temperature sensor
re
"5" and "0" are repeatedly
speed sensor
B84 83 0 or 5 0 or 5 displayed when vehicle is
driven .
44
ON-BOARD DIAGNOSTICS II SYSTEM [TSO1] 2-7
5. Specified Data
Signal (V)
C onnector T erm i na l
Content Ignition SW ON Note
No . No . Engine ON (Idling)
(Engine OFF)
Starter switch B84 86 0 0 Cranking : 8 to 14
ON : 10 - 13 ON : 13 - 14
A/C switch B84 60
OFF : 0 OFF : 0
Ignition switch B84 85 10-13 13- 14 -
ON : 0 Switch is ON when shift is in
Neutral position switch B84 82
OFF : 5 .0f0 .5 "N " or "P " position .
Test mode connector 884 84 5 5 When connected : 0
Knock Signal B84 3 2 .8 2.8 -
sensor Shield B84 56 0 0 -
When measuring voltage
AT/MT identification B84 81 5 5
between ECM and body .
Back-up power supply B84 39 10-13 13-14 Ignition switch "OFF" : 10 - 13
Control unit power B84 1 10-13 13-14 -
supply 2
Ignition # 1, # 2 B84 41 0 1 -3 .4 -
control # 3, # 4 B84 40 0 1 -3 .4 -
# 1 B84 96 10-13 1-14 Waveform
Fuel #2 B84 70 10-13 1-14 Waveform
injector #3 B84 44 10-13 1-14 Waveform
#4 B84 16 10-13 1 -14 Waveform
Idle air OPEN end B84 14 - 1 -13 Waveform
control
solenoid CLOSE B84 13 - 13-1 Waveform
valve end
Fuel pump relay ON : 0.5, or less
g84 32 0 .5, or less -
control OFF : 10 - 13
ON : 0.5, or less ON : 0 .5, or less
A/C relay control B84 31
OFF: 10 - 13 OFF : 13 - 14
Radiator fan relay 1 B84 ON : 0 .5, or less ON : 0 .5, or less
74
control OFF: 10 - 13 OFF : 13 - 14
Radiator fan relay 2 ON : 0 .5, or less ON : 0 .5, or less
With A/C vehicles only
control B84 73 OFF : 10 - 13 OFF : 13 - 14
Self-shutoff control B84 63 10-13 13-14 -
Malfunction indicator B84 58 Light "ON" : 1, or less
lamp Light "OFF" : 10 - 14
Engine speed output B84 64 - 0 - 13, or more Waveform
Torque control signal B84 79 5 5 -
Mass air flow signal B84 47 0-0 .3 0 .8- 1 .2 -
Purge control solenoid ON : 1, or less ON : 1, or less
valve B84 72 OFF : 10 - 13 OFF : 13 - 14
Atmospheric pressure B84 26 3 .9-4 .1 2 .0-2 .3 -
sensor
Pressure sources
ON : 1, or less ON : 1, or less
switching solenoid B84 15
OFF : 10 - 13 OFF : 13 - 14
valve
ON : 1, or less ON : 1, or less
EGR solenoid valve B84 71
OFF : 10 - 13 OFF : 13 - 14
Front oxygen sensor
g84 38 0-1 .0 0-1 .0 -
heater signal
45
2-7 tT5o21 ON-BOARD DIAGNOSTICS II SYSTEM
5. Specified Data
Signal (V)
C onnector Term i na l
Content I9nition SW ON Note
No . No . Engine ON (Idling)
(Engine OFF)
Rear oxygen sensor B84 37 0-1 .0 0-1 .0 -
heater signal
AT diagnosis input Less than 1 .-. More Less than 1 +-+ More
B84 80 Waveform
signal than 4 than 4
GND (sensors) B84 20 0 0 -
69
GND ( i njectors) B8 4 95 0 0 -
GND (ignition system) B84 94 0 0 -
19
G ND (power supp l y) B 84 46 0 0 -
17
GND (control systems) B84 18 0 0 -
GND (oxygen sensor B84 42 0 0
heater)
2. ENGINE CONDITION DATA
Content Specified data
1 .7 - 3 .3 (g/sec) : Idling
M ass a i r fl ow
7 .1 - 14 .2 (g/sec) : 2,500 rpm racing
1 .6 - 2 .9 (%) : Idling
E ng i ne l oa d
6 .4 - 12 .8 (%) : 2,500 rpm racing
Measuring condition:
" After warm-up the engine.
" Gear position is in "N" or "P" position .
" A/C is turned OFF.
All accessory switches are turned OFF.
46
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