Battery/Charging System Troubleshooting - Honda TRX450R Service Manual

BATTERY/CHARGING SYSTEM (After '05)
TROUBLESHOOTING
Battery is Damaged or Weak
1. Battery Test
Remove the battery (page 21-6).
Check the battery condition using the recommended battery tester.
RECOMMENDED BATTERY TESTER: BM-210-AH (U.S.A. only), BM-210, BATTERY MATE (MTP08-0192,
U.S.A. only) or equivalent
Is the battery in good condition?
NO - Faulty battery
YES - GO TO STEP 2.
2. Current Leakage Test
Install the battery (page 21-6).
Check the battery current leakage test (Leak test: page 21-7).
Is the current leakage below 0.01 mA?
YES - GO TO STEP 4.
NO - GO TO STEP 3.
3. Current Leakage Test without Regulator/Rectifier
Disconnect the regulator/rectifier connector and recheck the battery current leakage.
Is the current leakage below 0.01 mA?
YES - Faulty regulator/rectifier
NO - • Shorted wire harness
• Faulty ignition switch
4. Alternator Charging Coil Inspection
Check the alternator charging coil (page 21-8).
Is the alternator charging coil resistance within 0.1 - 1.0Q (20°C/68°F)?
YES - Faulty charging coil
NO - GO TO STEP 5.
5. 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 measurements to the results of the following calculation.
STANDARD: Measured BV < Measured CV < 15.5 V
• BV = Battery voltage
• CV = Charging voltage
Is the measured charging voltage within the standard voltage?
YES - Faulty battery
NO - GO TO STEP 6.
6. Regulator/Rectifier System Inspection
Check the voltage and resistance at the regulator/rectifier connector (page 21-8).
Are the measurements correct?
YES - Faulty regulator/rectifier
NO - • Open circuit in related wire
• Loose or poor contacts of related terminal
• Shorted wire harness
21-5