Mazda B-Series 1997 Workshop Manual page 526

CONTROL SYSTEM (FOR 2.3L)
Terminal
-
Connected To s t Condition
Specififiion
R e y k
1
possible
cause
1
,
Key ON
r - -
-
Mass air flow (MAF)
Open or short circuit from
sensor
I
Drlv~ng 48 kmlh (30 mph)
MAF to PCM.
Driving 88 kmlh (55 mph)
- .
I
Throttle position (TP)
1
idle 0.8V
-
Open or short circuit from
sensor
/
Driving 48 km/h (30 mph) 0.9-1.2V
-
TP to PCM.
/
Driving 88 kmlh (55 mph)
1
1 .I-1.3V
I
-
1
90
1
Vehicle reference
ON
;;
4 3
,,
Or
1
- .
-
(Output) voltage (VREF)
Key OFF
- -
- .
-
PCM malfunction.
91 S~gnal return Constant Open circuit.
92 Brake OnIOff ( 8 0 0 )
/
Brake pedal depressed
(Input) switch
'
Brake pedal released
B+
Open or short circuit
O V from BOO to PCM.
93 Heated oxygen
Open or short circuit
(Input) sensor-11 (front) Engine running at normal from sensor to PCM.
I 1
operating temperature
0.1 V Contaminated sensor.
Heated oxygen
Open or short circuit from
sensor-1 2 (rear)
i Engine running at normal
sensor to PCM.
5
operating temperature Contaminated sensor.
Key ON
97
Vehicle power
Open or short circuit from
Key OFF
P(;M relay to PCM.
- -
Key ON
I
B+
Hot idle
I
3 4-3.5 msec]
I
1
- -
Open or short circuit
Drlvlng 48 kmlh (30 mph) 5.7-6.9 msec
from injector #4 to PCM.
Driving 88 kmlh (55 mph)-8.4mA-l
1
Injector #2
(Output)
Open or short circuit
from injector #2 to PCM.
I
Driving 88 kmlh (55 mph)
I
5.8-8.4 msec
/
-
1
103 Power ground Constant
Poor connection at PCM.
Open circuit.
- - - -
I O4
lgnltlon colt #4
(Output)