Troubleshooting
Battery runs down quickly
Step 1
- 1) Check accessories which use excessive amounts of electricity.
Are accessories being installed?
YES | Remove accessories. |
NO | Go to Step 2. |
Step 2
- 1) Check the battery for current leaks. (10-9)
Is the battery for current leaks OK?
YES | Go to Step 3. |
NO | Short circuit of wire harness Faulty electrical equipment |
Step 3
- 1) Measure the regulated voltage between the battery terminals. (10-10)
Is the regulated voltage OK?
YES | Faulty battery Abnormal driving condition |
NO | Go to Step 4. |
Step 4
- 1) Measure the resistance of the generator coil. (10-10)
Is the resistance of generator coil OK?
YES | Go to Step 5. |
NO | Faulty generator coil Disconnected lead wires |
Step 5
- 1) Measure the generator no-load performance. (10-11)
Is the generator no-load performance OK?
YES | Go to Step 6. |
NO | Faulty generator |
Step 6
- 1) Inspect the regulator/rectifier. (10-11)
Is the regulator/rectifier OK?
YES | Go to Step 7. |
NO | Faulty regulator/rectifier |
Step 7
- 1) Inspect wirings.
Is the wirings OK?
YES | Faulty battery |
NO | Short circuit of wire harness Poor contact of couplers |
Battery overcharges
- Faulty regulator/rectifier
- Faulty battery
- Poor contact of generator lead wire coupler
Inspection battery current leakage
- Remove the front seat. (9-4)
- Turn the ignition switch to the OFF position.
- Remove the battery cover.
- Disconnect the battery − lead wire.
- Measure the current between − battery terminal and the − battery lead wire using the multi-circuit tester. If the reading exceeds the specified value, leakage is evident.
- 09900-25008: Multi-circuit tester set
- Battery current (leak): Under 3 mA
- Tester knob indication: Current (20 mA)
Caution:
- In case of a large current leak, turn the tester to high range first to avoid tester damage.
- Do not turn the ignition switch to the "ON" position when measuring current.
Regulated voltage
- Remove the front seat. (9-4)
- Start the engine and keep it running at 5 000 r/min with the dimmer switch turned HI position.
- Measure the DC voltage between the + and − battery terminals using the multi-circuit tester. If the voltage is not within the specified value, inspect the generator and regulator/recti-fier. (10-10)
Note: When making this test, be sure that the battery is in fully-charged condition.
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Voltage
- Regulated voltage (Charging output): 14.0 - 15.5 V at 5 000 r/min
Generator coil resistance
- Remove the fuel tank. (6-3)
- Remove the left frame side cover. (9-5)
- Remove the left frame lower side cover. (3-6)
- Disconnect the generator coupler 1.
- Measure the resistance between the three lead wires.
If the resistance is out of specified value, replace the stator with a new one. Also, check that the generator core is insulated properly.
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Resistance (Ω)
- Generator coil resistance: 0.2 - 1.5
- Ω (Black - Black)
- Ω (Black - Ground)
Note: When making above test, it is not necessary to remove the generator.
Generator no-load performance
- Disconnect the generator coupler. (10-10)
- Start the engine and keep it running at 5 000 r/min.
- Using the multi-circuit tester, measure the voltage between three lead wires.
If the tester reads under the specified value, replace the generator with a new one.
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Voltage
- Generator no-load performance: 70 V (AC) and more at 5 000 r/min (When engine is cold)
Regulator/rectifier
- Remove the fuel tank. (6-3)
- Remove the left frame side cover. (9-5)
- Remove the left frame lower side cover. (3-6)
- Disconnect the regulator/rectifier couplers 1.
- Measure the voltage between the lead wires using the multicircuit tester as indicated in the table below. If the voltage is not within the specified value, replace the regulator/rectifier with a new one. (9-41)
- 09900-25008: Multi-circuit tester set
- Tester knob indication: Diode test
*1.4 V and more (tester's battery voltage)
Note: If the tester reads 1.4 V and below when the tester probes are not connected, replace its battery.