21-5
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BATTERY/CHARGING SYSTEM
TROUBLESHOOTING
BATTERY IS DAMAGED OR WEAK
1. BATTERY TEST
Remove the battery (page 21-6).
Check the battery condition using the recommended battery tester.
Is the battery good condition?
YES – GO TO STEP 2.
NO – Faulty battery
2. CURRENT LEAKAGE TEST
Install the battery (page 21-6).
Check the battery current leakage test (page 21-7).
Is the current leakage below 1.2 mA?
YES – GO TO STEP 3.
NO – GO TO STEP 6.
3. CHARGING VOLTAGE INSPECTION
Measure and record the battery voltage using a digital multimeter (page 21-6).
Start the engine.
Measure the charging voltage (page 21-7).
Compare the measurement to result of the following calculation.
Is the measured charging voltage within the standard voltage?
YES – Faulty battery
NO – GO TO STEP 4.
4. REGULATOR/RECTIFIER SYSTEM INSPECTION
Check the voltage and resistance at the regulator/rectifier connector (page 21-8).
Are the results of checked voltage and resistance correct?
YES – GO TO STEP 5.
NO – • Open circuit in related wire
• Loose or poor contacts of related terminal
• Shorted wire harness
5. ALTERNATOR CHARGING COIL INSPECTION
Check the alternator charging coil (page 21-9).
Is the alternator charging coil resistance within 0.1 – 0.5 (20°C/68°F)?
YES – Faulty regulator/rectifier
NO – Faulty charging coil
6. CURRENT LEAKAGE TEST WITHOUT REGULATOR/RECTIFIER CONNECTOR
Disconnect the regulator/rectifier 2P (Black) connector and recheck the battery current leakage.
Is the current leakage below 1.2 mA?
YES – Faulty regulator/rectifier
NO – • Shorted wire harness
• Faulty ignition switch
RECOMMENDED BATTERY TESTER: BM-210 or BATTERY MATE or equivalent
STANDARD:
Measured BV < Measured CV < 15.5 V
• BV = Battery Voltage
• CV = Charging Voltage
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