Mazda RX-7 1989 Service Highlights page 46

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Code number
Caution
a) If there is more than one failure present, the lowest number malfunction code is displayed
first, the subsequent malfunction codes appear in order.
b) After repairing all failures, turn the ignition switch OFF, disconnect the negative battery ca-
ble, at least 5 seconds to erase the malfunction code memory.
In put devices
Code
Input devices Malfunction
Fail-safe function
Output signal pattern
No. (Self-Diagnosis Checker or MIL)
l'
lgn1110n coil Malfunction of spark
T rail1ng-s1de 1gn1t1on
Jl
with 1gn1ter plug. broken w1re. short pulse cut
(Trail1ng s1de) ClfCUit
:2
Crank angle sensor Broken w1re. short
Fuel InJeCtion and 1gn1-
I
(Ne s1gnal) c1rcuit 1 lion cut
Crank angle sensor
Broken w1re. short Fuel InJection and 1gn1
I
(G s1gnal) ClfCUit t1on cut
A1rflow meter (AFM) Broken w1re. short Bas1c fuel InJection
..
ClfCUII
amount and 1gn1!10n
t1m1ng f1xed
Water thermosensor
Broken w1re. short Coolant temp. input llll
ClfCUI! f1xed at 80°C (176°F)
Intake a1r Broken w1re. short
' Intake a1r temp. 1nput
n
thermosensor (AFM)
ClfCUit 1 f1xed at 20°C (68°F)
;ntake a1r thermo- Broken w1re. short
Intake a1r temp. 1nput
fU
sensor (Eng1ne) ClfCUit
f1xed at 20°C (68°F)
Throttle sensor
Broken w1re. short Throttle valve open1ng
Jll
1Full range) ClfCUit
angle input signal f1xed
at 20% open
Pressure sensor Broken w1re. short Intake man1fold pressure
J1l
: ·1take man1fold ClfCUII 1nput s1gnal f1xed at 760
:Yessure)
mmHg (29.9 inHg)
-'ltmosphenc pres-
Malfunct1on1ng ECU Atmospheric pressure
run
~u re sensor (A TP)
1nput s1gnal f1xed at
Built 1n ECU)
760 mmHg (29.9 1nHg)
J
x
ygen sensor Oxygen sensor output rema1ns
Feedback system can-
JUI
below 0 55V 80 sec aher FiB celed (For EGI)
system operat1on beg1n1ng
:- eedback system Oxygen sensor output re
Feedback system can- rull
ma1ns 0 SSV · 0 sec after FIB celed (For EGI)
system operat1on begm1ng
-
· •ottle sensor
Broken w1re. short Throttle valve open1ng
JUII[
.arrow range)
circuit angle 1nput s1gnal f1xed
at full open
'.'eter1ng oil pump
Broken w1re. short MOP f1xed smallest open
m
· -s,t,on sensor CirCUit Bas1c fuel 1nJect1on amount
i
and 1Qn1t1on t1m1ng f1xed
· .' .c:enng oil pump Malfunct1onmg MOP. steo mo
MOP f1xed smallest open
Jrull
'.'8P) tors. broken w1re. short c1rcu1t
Bas1c fuel 1nj8ct1on amoun:
or malfunct10n1ng ECU and 1Qn1t1on tmng f1xed
·.·-:c-:er :1g oil pump Malfunct on1ng MOP. step ,"lotors Basic fuel InJeCtion
ImJII
'.':JP)
1
broken 111re. srort c rcu t. rralfunc-
amount and ignit1on
t:on.ng ECU. alter1ator or battery t1m1ng fixed
97UOFI-516
F1-23