air condition MAZDA 232 1990 Suplement User Guide

F2 TROUBLESHOOTING GUIDE
20 POOR ACCELERATION [BP TURBO]
IESCRIP- . Performance poor while accelerating
rm
l Idle condition normal
[TROUBLESHOOTING HINTS]
3 Wastegate always open or opens early @ Low intake air amount
3 Turbocharger damage
l Throttle valve not open fully
3 Factors other than engine malfunction *Clogged intake air system l
Ciutch slIpping @ Air/Fuel mixture Iean l Brake draggrng l fuel line pressure decreases
l low tire pressure l Fuel Injection malfunction
l Incorrect tire size @ Poor Ignition
. Overloaded vehicle @ Low engine compression
@ Atcohol blended fuel used
TEP INSPECTION ACTION
-l Install pressure gauge
in intake air pipe and I Yes
1 Go to Step 3
check boost pressure at engine speed of 4,000
rpm
w page F2-45
Boost pressure:
More than 2.0 kPa (0.02 kglcm2, 0.3 psi)
No Check for air leakage and exhaust gas
leakage
4 If OK, go to next step
4 If not OK, repair
2 Check wastegate w page F2-45
Yes Remove Intake air pipe from turbo-
charger and check if compressor wheel
rotates smoothly w page F2-46
c3 If OK, check air cleaner element
and throttle valve
4 If not ok, replace turbocharger
3 Check factors
other than engine
Yes Go to next step l Clutch stipprng l 5rake dragging l Low tire pressure
No l Incorrect ttre size Repair or adjust
FZ-36

TROUBLESl-lOOTING GUIDE F2
;TEP 1 INSPECT1ON
ACTION
13 Check if resistance of ignition coil 1s OK*
Yes Go to next step
Resistance (at 20°C iSS*FJ):
Primary coil winding . . . . . . . .
0.81~-0.99Q
Secondary coil winding,,.. 1 O--16 kR
PRIMARY COIL
WINDING SECONDARY COIL
WlNDlNG
NO Replace
14 Check for correct engine compression”
Yes Gc to next step
1 Engine compression (Minimum):
785 kPa (8.0 kg/cm , It4 psi)-300 ipm
NO Check engine condition” l Worn piston, piston rings or cylinder
wall
l Defective cylinder head gasket l Distorted cylinder head l Improper valve seating
*Valve sthing in guide
15 Change fuel and check if acceleration improves
Yes Change fuel to another brand
NO
Go to next step
16 Check if NC cut-off control system is OK’
Yes Go to next step
No Repair or replace
17
I Try known good ECU and check if condition
improves
* Refer to 323 Workshop Manual [1203-IO-89F (Europe) or i204-IO-89F (Australia)].
93GOF2-747
F2-39

F2 CUNTRULSYSTEM
‘erminal Input Output i Connected to Test condition Correct voltage Remark
2A - - ’ Ground {Injector)
Constant OV -
2B - - I Ground (Output)
Constant OV -
2c , - - 1 Ground (CPU)
Constant OV - 20
-i- Ground (Input) Constant
OV -
2E ’ 0 1 Distributor I
Ignition switch ON Approx. OV
(Ne-signal)
or 5v -
Idle Approx. 2V
2F -j- - - - -
2G 0
Distributor ignition switch ON Approx. OV
(G-stgnal) or 5V
Idle Approx. I.3
2t-I - - -
- - -
21 - - - - - -
2J C
Knock control unit
Idle Approx. 4. OV -
2K 0
Thronle sensor/ Constant . 4.5--5.W
Airflow meter
-
2L
- -
- - - -
I
2M 0 Throttle sensor
Accelerator pedal released Approx. 0.W
-
Accelerator pedal fully depressed Approx. 4.W
2N 0
20 0
2P 0
1
2Q ! 0
2R Oxygen sensor
Airflow meter
Intake air
thermosensor
Water
thermosensor 0
’ Turbocharge
indicator Ignition switch ON
f OV
Idle (Cold engine) ov
Idle (After warm-up) O-l .ov -
Increasing engine speed [After warm-up) 0.5-I .ov
Deceleration o-0.4v
ignition switch ON
’ Idle Approx. 3.8V
-
Approx. 3.OV
Ambient air temperature 20°C (68OF) Approx. 2SV In airflow meter
Engine coolant temperature 20°C (68OF) Approx. 2.5V
-
After warm-up
Below 03
Ignition switch ON
Approx. f2V
-
F2-64

F2 CONTROLSYSTEM
Terminal I Input Output Connected to Test condition Correct voltage Remark
25 0
Overboost warning lgnltion switch ON Approx. 12V
-
buzzer
2T 0 1 Solenoid valve 180 seconds atter engine started when Below 1 SV
(Pressure regulator) engine coolant temperature above 90%
(I 94OF) and Intake air temperature above -
58OC (13WF)
1 Other condition at Idle Approx. 12V
2u 0 Injector (Nos. I 1 3) Ignrtion switch ON Approx. 12V * Engine Signal
Idle Approx. 12V’ Monitor: Green
and red lamps
Engrne speed above 2,000 rpm on de- Approx. f2V
flash
celeratlon (Atter warm-up)
2v 0 Injector (Nos. 2, 4) lgnitlon swrtch ON Approx. 12V
Idle Approx. 12V’
Engine speed above 2,000 rpm on de- Approx. 12V
ceieration (After warm-up)
2W 0
ISC valve Ignition switch ON Approx. 7V
-
Idle Approx. 9V
2x 0 Solenoid valve Ignition switch ON Approx. 12V
(Purge control)
t Idle -
Approx. f2V
t
2Y 0 Cmxit opening Ignition switch UN Approx. 12V
-
relay
Idle Below 1 .OV
22 - - - - - -
-L J
u-
v I U-1 l-
2y 2w 2u 2s 20 20 2M 2K 21 2G 2E 2C
2A 1U 1S IQ 10 1M 1K 11 1G 1E IC 1A
22 2X 2V 2T 2R 2P 2N 2L 2.J i’t-( 2F 2D 2B 1V 1T 1R tP IN IL I..! ItI IF
tD 18
F2-66