Engine Will Not Start (But Starter Motor Runs); No Charging - Sakai R2-4 Shop Manual

2-3-2. Engine will not start (But starter motor runs)

• In case of engine will not start while starter motor runs, generally trouble is caused by that fuel is not
supplied, supply amount of fuel is extremely low, or selection of fuel is not appropriate.
• Check that fuel is supplied to inlet of fuel pump.
Reference Fig.: 2-3-1
Check point
1. Fuel Pump
2. ECU Main Relay
3. Harness Connecting
Between Terminals

2-3-3. No charging

Reference Fig.: 2-3-1
Check point
1. Alternator
Check/Cause
• when starter switch is ON, measure voltage between fuel
pump terminal inlet wire WB and chassis ground.
Standard voltage : 12 V or more
• If above item is OK and fuel pump does not operate, fuel
pump is faulty.
(1) Measure voltage between ECU main relay terminal 86
inlet wire R and chassis ground.
Standard voltage : 12 V or more
(2) Measure voltage between ECU main relay terminal 30
inlet wire R and chassis ground.
Standard voltage : 12 V or more
(3) when starter switch is ON, measure voltage between
ECU main relay terminal 87 outlet wire wB and chassis
ground.
Standard voltage : 12 V or more
• If above items (1) and (2) are OK and item (3) is NG, ECU
main relay is faulty.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
Check/Cause
• After starting engine, measure voltage between alternator
terminal B wire B and chassis ground.
Standard voltage : At least intermediate engine speed,
• If voltage is lower than standard, alternator is faulty.
• If voltage is normal and battery is not charged, battery is
faulty.
14 V or more
TROUBLESHOOTING
Action
Repair or replace fuel
pump.
Replace ECU main relay.
Repair or replace
harness.
Action
Replace alternator or
battery.
10-023