Mazda MX-5 1990 Workshop Manual page 272

F
CONTROL SYSTEM
Terminal Input
Output
Connection to Test condition Voltage Remark
1A
-
-
Battery Constant Approx. 12V For backup
1B 0 Main relay Ignition switch OFF
Approx.OV
Ignition switch ON
Approx. 12V
1C 0
Ignition switch While cranking
Approx. 10V
(Start position)
Ignition switch ON Approx. OV
10 0 Self-Diagnosis Test switch at "SELF-TEST"
With Self-Diagnosis
Checker (Monitor Lamp illuminated for 3 sec. after ignition Approx.5V
Checker and
lamp) switch OFF
~
ON System Selector
Lamp not illuminated after 3 sec. Approx. 12V
Test switch at "02 MONITOR" at idle
Approx. 5V
Monitor lamp illuminated
Test switch at "02 MONITOR" at idle
Approx. 12V
Monitor lamp not illuminated
1E 0 Malfunction Lamp illuminated for 3 sec. after ignition
Below 2.SV
With System
indicator lamp
switch OFF-ON Selector test
Lamp not illuminated after 3 sec. Approx. 12V
switch at
Lamp illuminated
Below 2.5V
"SELF-TEST"
Lamp not illuminated Approx. 12V
1F 0 Self-Diagnosis
Buzzer sound for 3 sec. after ignition
• With Self-
Checker (Code
switch OFF-ON
Below 2.5V Diagnosis
number)
Checker and
Buzzer not sounded after 3 sec. Approx. 12V
System Selector
• With System
Buzzer sounded Below 2.5V
Selector test
switch at
Buzzer not sounded Approx. 12V
"SELF-TEST"
1G 0 Igniter Ignition switch ON
Approx.OV
Idle
Approx. O.2V
1H
0
Igniter Ignition switch ON Approx.OV
Idle Approx. O.2V
11
-
-
-
- - -
1J 0
AIC relay
Ignition switch ON Approx. 12V
AIC switch ON at idle Below 2.5V
AlC switch OFF at idle Approx. 12V
1K
0
Diagnosis System Selector test switch at
Approx. 12V
connector
"02
MONITOR"
System Selector test switch at
Approx.OV
"SELF-TEST"
1L
-
-
-
-
-
-
1M
-
- -
-
- -
1N 0 Throttle sensor Accelerator pedal released
Approx. OV Ignition switch
(Idle point)
Accelerator pedal depressed Approx. 12V
ON
10 0 Stoplight switch
Brake pedal released OV
Brake pedal depressed Approx. 12V
1P
0 PIS pressure Ignition switch ON Approx. 12V
switch
PIS
ON (at idle) OV
PIS OFF (at idle)
Approx. 12V
10 0
A/C
switch AIC
switch ON (Ignition switch ON) Below 2.SV Blower motor ON
Ale switch OFF (Ignition switch ON) Approx. 12V
F-128