Battery/Charging System Troubleshooting - Honda CRF450X 2005 Service Manual

BATTERY/CHARGING SYSTEM
TROUBLESHOOTING
BATTERY IS DAMAGED OR WEAK
1. SA TTERY TEST
Remove the battery (page 17-6),
Check the battery cond ition usi ng the recommen ded battery teste r.
RECOMMENDED BATTERY TESTER:
Micro 404XL (U.S.A. only), BM·210 or equivalent
Is the battBry in good condition ?
NO - Faulty battery.
YES - GO TO STEP 2.
2. CURRENT LEAKAGE TEST
Insta ll the battery (page 17-6).
Check the battery cu rrent leakage test (l eak test; page 17-71,
Is the current leakage below 0. 1 rnA?
YES - GO TO STEP 4.
NO - GO TO STEP 3.
3. CURRENT LEAKAGE TEST WITHOUT REGULATOR/ RECTIFIER CONNECTED
Disconnect the regula tor/rectifier connector and recheck the battery current leakage.
Is the current leakage below O. 1 rnA ?
YES - Faulty regulator/rectifier.
NO - Shorted wi re harness.
4. ALTERNATOR CHARGING COil INSPECTION
Check the alternator cha rging coi l !page 17-8).
Check for continuity between Yellow terminal and Ground, White term inal and Ground.
Is there continuity?
NO
- Faulty charging coil.
YES - GO TO STE P
5.
5. CHARGING VOLTAGE INSPECTION
Measure and record the banery voltage u sing a digital mult imeter !page 17-6).
Start the engine.
Measu re the charging voltage (page
17-7).
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 th8 standard voltag87
YES - Faulty battery.
NO -
GO TO
STEP 6.
6.
REGULATOR/ RECTIFIER SYSTEM INSPECTION
Check the voltage and resistance at the regulator/rectifier connector (page 17-8).
Are the result of checked voltagB and resistance correct?
YES - Faulty regulator/rectifier.
NO _ . Open ci rcuit in rela ted wire
• Loose or poor contacts of related terminal
• Short ed wire harness
17-5