Difficult To Start Or No Start - Toyota MR2 1988 Repair Manual

Fl-10 EFI SYSTEM - Troubleshooting
Digital Type
Analog Type
ldd~
1/
Fl0889
4. Use a volt/ohmmeter with high impedance (1 0 k!l/V
minimum) for troubleshooting of the electrical circuit. (See
page Fl-26)
TROUBLESHOOTING PROCEDURES
SYMPTOM- DIFFICULT TO START OR NO START
(ENGINE WILL NOT CRANK OR CRANKS SLOWLY)
CHECK ELECTRIC SOURCE
BAD
1. Battery
(1) Connection
(2) Gravity - drive belt-charging system
(3) Voltage
2. Fusible link
~
OK
CHECK STARTING SYSTEM
BAD
1. Ignition switch
2. Clutch (M/T) or Neutral start switch (A/T)
3. Starter relay
4. Starter
5. Wiring/Connection
SYMPTOM- DIFFICULT TO START OR NO START (CRANKS OK)
CHECK DIAGNOSIS SYSTEM Diagnosis code(s) (See page Fl-24 to 27)
Malfunction
Check for output of diagnosis code.
code
(See page Fl-21)
~
Normal code
CHECK FOR VACUUM LEAKS IN AIR
BAD
1 . Oil filler cap
INDUCTION SYSTEM 2. Oil level gauge
3. Hose connections
4. PCV hose
5. EGR system - EGR valve stays open
~
OK
CHECK IGNITION SPARK
BAD
1. High-tension cords
1. Unplug connectors of injector 2. Distributor
and start injector time switch.
3. Ignition coil, igniter
2. Check by holding spark plug cord 8 -
10 mm (0.31 - 0.39 in.) away from
engine block while cranking engine.
A strong spark should be noted.
~
OK
CHECK IGNITION TIMING
NO
Ignition timing Adjust
1. Short terminals T and E1 of the
(See page IG-11)
check connector.
2. Check ignition timing.
STD:
1
oo
BTDC
@
Idling
(w/short-circuited T and E,)
~
OK
CONTINUED ON PAGE Fl-11