Subaru XT 1988 Service Manual page 321

2-7
FUEL INJECTION SYSTEM
Basic Operation of Self-diagnosis System
NO TROUBLE
Engine
Read memory
Test mode
connector connector
ON X X
2
ON
0 X
*3
ON X 0
*4
ON 0
0
OFF
0 X
(Ignition switch ON)
5
OFF
X X
(Ignition swit·ch ON)
6
OFF
(Ignition switch ON)
X
0 7
OFF
0 0
(Ignition switch ON)
8
TROUBLE
Engine
Read memory Test mode
connector connector
9 ON
X X
10 ON
0
X
*11
ON
X 0
*12
ON
0 0
OFF
0 X
(Ignition switch ON)
13
STALL
X X
(Ignition switch ON)
14
STALL
X
0
(Ignition switch ON)
15
STALL
0 0
(Ignition switch ON)
16
0: CONNECT X: DISCONNECT
CHECK
O
2
monitor
Remarks
ENGINE light
lamp
OFF
O
2
monitor
OFF O
2
monitor
**
Vehicle specification
OFF
code is outputted when
OFF -+ Blink
CHECK ENGINE light
is OFF.
All memory stored in
OFF -+ Blink OFF
control unit is cleared
after CHECK EN-
GINE light blinks.
ON
Vehicle spec if i-
cation code
Vehicle specifi-
Before starting the
ON
engine, the self-
cation code
diagnosis system
Vehicle specifi-
assumes the engine to
ON
cation code
be in NO TROUBLE
condition.
ON
Vehicle specifi-
cation code
CHECK
O
2
monitor
Remarks
ENGINE light lamp
ON Trouble code
ON
Trouble code
(memory)
**
OFF -+ ON
Trouble code
Vehicle specification
code is outputted when
**
. CHECK ENGINE light
OFF-+ON
Trouble code
is OFF.
ON
Trouble code
(memory)
ON Trouble code
ON
Trouble code
ON Trouble code
*:
Ignition timing is set to 20
0
BlOC (when the engine is on, test mode connector is connected, a:nd idle switch is ON).
**:
CHECK ENGINE light remains off until engine is operated at speed greater than 2,000 rpm for at least 40 seconds.
34