Output Devices And Engine Conditions - Mazda MX-5 1990 Workshop Manual

I.
F
TROUBLESHOOTING GUIDE
Output Devices and Engine Conditions
OUTPUT
DEVICES
INJECTOR
SOLENOID
AIC
APPROXI·
MATE TIME
(BASED ON
10-16°C or
50-60°F
AMBIENT)
ISC
INJECTION INJECTION VALVE
TIMING
VALVE RELAY MAIN
(PURGE (Ale RELA Y
ENGINE
CONDITIONS
CONTROL) CUT ·OFF)
CRANKING
-COLD ENGINE
• COLD AIR
• COLD COOLANT
COLD START
-FAST IDLE
• COLD AIR
• COLD COOLANT
COLD DRIVEAWAY
-PART THROTTLE
• COLD AIR
• COLD COOLANT
WARM DRIVEAWAY
-PART THROTTLE
• WARM AIR
• WARM COOLANT
ZERO
ONE
MINUTE
TWO
MINUTES
THREE
MINUTES
RICH
ALL
CYLINDERS
EACH
Ne-SIGNAL
2·GROUP
LARGE
AMOUNT
OF
BYPASS
AIR
OFF
(PURGE
CUD
RICH
~-------------+--~--4AND
LEAN
HOT CRUISE
• WARM AIR
• WARM COOLANT
HOT
ACCELERATION
-60% THROTTLE
HOT ACCELERATION
-WIDE OPEN
THROTTLE
MORE
I - - - - - - - - - - - - l
THAN
DECELERATION
-CLOSED THROTTLE
HOT CURB IDLE
-EXTENDED
HOT ENGINE SHUT
DOWN
F-14
FOUR
MINUTES
RICH
FUEL CUT
SMALL
AMOUNT
OF
BYPASS
AIR
OPERATES
(DUTY
VALUES
[PURGE
GAS
AMOUNT]
CHANGE)
LARGE
AND
SMALL
AMOUNT
OF
BYPASS
AIR
OFF
(PURGE
1---~----+-----4cun
RICH
AND
LEAN
SMALL
2.GROUP AM OUT
OF
BYPASS
AIR
DOES NOT INJECT
OFF OFF
1
OFF
(AIC CUT)
ON
(A/C
ON)
OFF
(A/C
CUT)
ON
(AIC
ON)
OFF
ON
OFF
IGNITER
IGNITION
SPARK
ADVANCE
SIGNAL
OFF
05UOFX-011