Sakai TW504 - Engine will Not Start (Starter Motor Does Not Run) 3;3; Engine will Not Start (but Starter Motor Runs)

10-096
TROUBLESHOOTING
SW504
4-2-1. Engine will not start (Starter motor does not run) 3/3
F-R lever must be in “N”.
Parking brake switch must be applied.
Brake pedal is not depressed.
Reference Fig.: 4-2-1
Check point Check/Cause Action
11. Neutral Relay (1) When starter switch is ON, measure voltage between neutral
relay terminal a inlet wire GY and chassis ground.
There is no electricity in normal condition.
(2) When starter switch is ON, check continuity between neutral
relay terminal c inlet wire LY and f outlet wire LR.
There is continuity in normal condition.
If above items (1) is OK and item (2) is NG, neutral relay is faulty.•
Replace neutral relay.
12. Harness
Connecting
Between
Terminals
Measure resistance of harness connecting between terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
4-2-2. 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.: 4-2-1
Check point Check/Cause Action
1. Fuel Pump When starter switch is ON, measure voltage between fuel pump
terminal inlet wire WL and chassis ground.
Standard voltage : 12 V or more
If above item is OK and fuel pump does not operate, fuel pump is
faulty.
•
•
Repair or replace fuel
pump.
2. ECU Main Relay (1) Measure voltage between ECU main relay terminal 1, 3 inlet wire
WB and chassis ground.
Standard voltage : 12 V or more
(2) When starter switch is ON, measure voltage between ECU main
relay terminal 5 outlet wire WL and chassis ground.
Standard voltage : 12 V or more
If above items (1) is OK and item (2) is NG, ECU main relay is
faulty.
•
Replace ECU main
relay.
3. Harness
Connecting
Between
Terminals
Measure resistance of harness connecting between terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
No charging
Refer to (P.10-018).
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