Troubleshooting Guide

The charging system troubleshooting guide is shown in the following steps.

1. STEP 1. 

   Q: Is the battery in good condition? (Refer to  BATTERY CHECK  .) 

   YES:  Go to Step 2.

   NO:  Charge or replace the battery.

2. STEP 2. 

   Q: Is the generator drive belt in good condition? (Refer to  DRIVE BELTS (FOR GENERATOR AND AIR CONDITIONING) (CHECK)  .) 

   YES:  Go to Step 3.

   NO:  Adjust the belt tension or replace the belt.

3. STEP 3. 

   Q: Does the generator malfunction light come on when the ignition switch is turned on? 

   YES:  Go to Step 4.

   NO: 

   • Check the ignition switch (Refer to INSPECTION ).
   • Check for burnt-out generator malfunction light.
   • Check the generator malfunction light-related circuits.
4. STEP 4. 

   Q: Does the generator malfunction light go out after starting the engine? 

   YES:  Go to Step 5.

   NO:  Check the generator malfunction light-related circuits.

5. STEP 5. 

   Q: Is an oscilloscope available? 

   YES:  Go to Step 6.

   NO:  Go to  STEP 7.

6. STEP 6. 

   Q: Dose the oscilloscope show a normal wave pattern? (Refer to  CHARGING SYSTEM - ON-VEHICLE SERVICE - WAVE PATTERN CHECK USING AN OSCILLOSCOPE   .) 

   YES:  Go to Step 7.

   NO:  Check the generator related circuit. If the circuit is normal, replace the generator (Refer to CHARGING SYSTEM - GENERATOR ASSEMBLY - GENERATOR ASSEMBLY REMOVAL AND INSTALLATION  ).

7. 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.

8. 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 related circuit. If the circuit is normal, replace the generator (Refer to CHARGING SYSTEM - GENERATOR ASSEMBLY - GENERATOR ASSEMBLY REMOVAL AND INSTALLATION  ).

9. STEP 9. 

   Q: Is the regulated voltage normal? (Refer to  REGULATED VOLTAGE TEST  .) 

   YES:  Go to Step 10.

   NO:  Check the generator related circuit. If the circuit is normal, replace the generator (Refer to CHARGING SYSTEM - GENERATOR ASSEMBLY - GENERATOR ASSEMBLY REMOVAL AND INSTALLATION  ).

10. 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.