16. TROUBLESHOOTING 16.4.2 ELECTRICAL SYSTEM ( ): Always contact your Komatsu distributor when dealing with these items. In cases of abnormalities or causes which are not listed below, please contact your Komatsu distributor for repairs. If “02” or “04” is displayed, stop the machine at a safe place and apply the parking brake. After checking the service code, contact your Komatsu distributor for repairs.
2-113 Problem Main causes Remedy Lamp does not glow brightly even when engine runs at high speed ‡ Defective wiring ‡ Insufficient battery charge ‡ Defective adjustment of belt ten- sion (‡ Check, repair loose terminals, disconnections) ‡ Charge ‡ Add distilled water ‡ Adjust alternator belt tension. See EVERY 250 HOURS SERVICE. Lamp flickers while engine is run- ning Charge monitor lights up while run- ning engine.
‡ Defective alternator ‡ Defective wiring (‡ Replace) (‡ Check, repair) Abnormal noise is generated from alternator ‡ Defective alternator (‡ Replace) Starting motor does not turn when starting switch is turned to ON ‡ Defective wiring ‡ Defective starting switch ‡ Insufficient battery charge ‡ Defective battery switch (‡ Check, repair) (‡ Replace switch) ‡ Charge (‡ Replace switch) Starting motor turns engine slug- gishly ‡ Defective wiring ‡ Insufficient battery charge (‡ Check, repair) ‡ Charge Starting motor disengages before en- gine starts ‡ Defective wiring ‡ Insufficient battery charge (‡ Check, repair) ‡ Charge APS monitor does not light up ‡ Defective wiring ‡ Defective timer ‡ Defective monitor ‡ Disconnection in glow plug wiring (‡ Check, repair) (‡ Check) (‡ Replace) (‡ Replace)