Troubleshooting Guide

TROUBLESHOOTING GUIDE
The charging system troubleshooting guide is shown in the following chart.

STEP 1.

Q: Is the battery in good condition? (Refer to Battery On-vehicle Service Battery Check ).

YES: Go to Step 2.
NO: Charge or replace the battery.

STEP 2.

Q: Is the generator drive belt in good condition? (Refer to Maintenance Service - Drive Belts).

YES: Go to Step 3.
NO: Adjust the belt tension or replace the belt.

STEP 3.

Q: Does the charging warning light brightly when the ignition switch is turned on?

YES: Go to Step 4.
NO:
- Check the ignition switch. (Refer to Ignition Switch Inspection.)
- Check for burnt-out charging warning light.
- Check the generator. (Refer to Generator Disassembly and Assembly Inspection.)
- Check the charging warning light-related circuits.

STEP 4.

Q: Does the charging warning light go out after starting the engine?

YES: Go to Step 5.
NO: Check the generator (Refer to Generator Disassembly and Assembly Inspection.)

STEP 5.

Q: Is an oscilloscope available?

YES: Go to Step 6.
NO: Go to Step 7.

STEP 6.

Q: Dose the oscilloscope show a normal wave pattern? (Refer to Charging system Wave pattern check using a oscilloscope.)

YES: Go to Step 7.
NO: Check the generator. (Refer to Generator - Disassembly and Assembly Inspection.)

STEP 7.
- Engine: 2,500 r/min
- Headlight: ON (high beam)
- Voltage between generator terminal B and the positive battery terminal
OK: 0.5V or less
- Voltage between the negative battery terminal and generator body
OK: 0.5V or less

Q: Are the generator output line and ground line in good condition?

YES: Go to Step 8.
NO: Check the generator output line and ground line.

STEP 8.

Q: Is the output current normal? (Refer to Charging system On vehicle service Output current test.)

YES: Go to Step 9.
NO: Check the generator (Refer to Generator Disassembly and Assembly inspection.)

STEP 9.

Q: Is the regulated voltage normal? (Refer to Charging system On vehicle service Regulated voltage test.)

YES: Go to Step 10.
NO: Check the generator (Refer to Generator Disassembly and Assembly Inspection .)

STEP 10.

Q: Is the voltage drops in the generator output line normal?

YES: Generator is normal. Check other systems.
NO: Check the output line.