Troubleshooting Guide
The charging system troubleshooting guide is shown in the following steps.
- STEP 1.
Q: Is the battery in good condition? (Refer to Battery - On-vehicle Service - FLUID LEVEL AND SPECIFIC GRAVITY CHECK).
YES: Go to Step 2
NO: Charge or replace the battery.
- STEP 2.
Q: Is the drive belt in good condition? (Refer to On-vehicle Service - DRIVE BELT TENSION CHECK AND ADJUSTMENT).
YES: Go to Step 3
NO: Adjust the belt tension or replace the belt.
- STEP 3.
Q: Does the generator malfunction light come on when the ignition switch is turned "ON" position?
YES: Go to Step 4
NO: Check the ignition switch (Refer to Ignition Switch - IGNITION SWITCH CHECK).
Check the generator malfunction light and its related circuits.
Check the generator.
- STEP 4.
Q: Does the generator malfunction light go out after starting the engine?
YES: Go to Step 5
NO: Check the generator.
- STEP 5.
Q: Is an oscilloscope available?
YES: Go to Step 6
NO: Go to Step 7
- STEP 6.
Q: Does the oscilloscope show a normal wave pattern? (Refer to WAVEFORM CHECK USING AN OSCILLOSCOPE).
YES: Go to Step 7
NO: Check the generator.
- STEP 7.
- Engine: 2, 500 r/min
- Headlight: ON (high beam)
- Voltage between generator terminal B and the positive battery terminal
OK: 0.5 V or less
- Voltage between the negative battery terminal and generator body
OK: 0.5 V 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 OUTPUT CURRENT TEST).
YES: Go to Step 9
NO: Check the generator
- STEP 9.
Q: Is the regulated voltage normal? (Refer to REGULATED VOLTAGE TEST).
YES: Go to Step 10
NO: Check the generator.
- STEP 10.
Q: Is the voltage drop in the generator output line normal?
YES: Generator is normal. Check other systems.
NO: Check the output line.