On-Vehicle Inspection

CHECK BATTERY ELECTROLYTE LEVEL
1. Check the electrolyte level.
  1. If the electrolyte level is low, replace the battery (or add distilled water) and check the charging system.

CHECK BATTERY SPECIFIC GRAVITY

Check the color of the indicator.

Result

RESULT CHART

Indicator Color	Condition
Blue	Good
White	Charging necessary
Red	Replacement necessary

CHECK BATTERY VOLTAGE

Turn the ignition switch off and turn on the headlights for 20 to 30 seconds. This will remove the surface charge from the battery.

Fig 1: Identifying Indicator Color
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the battery voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTION STANDARD CONDITION CHART

Tester Connection	Condition	Standard Condition
Battery positive (+) terminal - Battery negative (-) terminal	20°C (68°F)	12.5 to 12.9 V

If the voltage is below the specification, charge the battery.

Fig 2: Measuring Battery Voltage

CHECK BATTERY TERMINAL
1. Check that the battery terminals are not loose or corroded.
  If the terminals are corroded, clean them.
CHECK FUSES
1. Measure the resistance of the fuses for the charging system.
  Standard resistance:
  
  Below 1 Ω
  
  If the result is not as specified, replace the fuses as necessary.
CHECK V-RIBBED BELT
1. Check the belt for wear, cracks and other signs of damage.
  If any of the following defects is found, replace the V-ribbed belt.
  - The belt is cracked.
  - The belt is worn out to the extent that the cords are exposed.
  - The belt has chunks missing from the ribs.
    
    Fig 3: Identifying V-Ribbed Belt Incorrect Position
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the belt fits properly in the ribbed grooves.
  HINT:
  
  Check by hand to confirm that the belt has not slipped out of the groove on the bottom to the pulley. If it has slipped out, replace the V-ribbed belt. Install a new V-ribbed belt correctly.
  
  Fig 4: Identifying V-Ribbed Belt Correct And Incorrect Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
VISUALLY CHECK GENERATOR WIRING
1. Check that the generator wiring is in good condition. If the condition is not good, repair or replace the generator wire.
LISTEN FOR ABNORMAL NOISES FROM GENERATOR
1. Check that there is no abnormal noise from the generator while the engine is running. If there is abnormal noise, replace the pulley or generator.
CHECK CHARGE WARNING LIGHT CIRCUIT
1. Turn the ignition switch to ON. Check that the charge warning light comes on.
2. Start the engine and check that the light goes off. If the light does not operate as specified, troubleshoot the charge warning light circuit.
CHECK CHARGING CIRCUIT WITHOUT LOAD
1. According to the following procedures, connect an ammeter and voltmeter as shown in the illustration.
  1. Disconnect the wire from terminal B of the generator and connect it to the negative (-) lead of the ammeter.
  2. Connect the positive (+) lead of the ammeter to terminal B of the generator.
  3. Connect the positive (+) lead of the voltmeter to the positive (+) terminal of the battery.
  4. Ground the negative (-) lead of the voltmeter.
2. Check the charging circuit.
  1. While keeping the engine speed at 2000 rpm, check the readings on the ammeter and voltmeter.
    Standard current:
    
    10 A or less
    
    Standard voltage:
    
    13.2 to 14.8 V
    
    Fig 5: Checking Charging Circuit Without Load
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    If the results are not as specified, replace the generator assembly.
    
    HINT:
    
    If the battery is not fully charged, the ammeter reading may be more than the standard current.
CHECK CHARGING CIRCUIT WITH LOAD
1. Keep the engine speed at 2000 rpm, turn on the high beam headlights, and turn the heater blower switch to the "HI" position.
2. Check the reading on the ammeter.
  Standard current:
  
  30 A or more
  
  If the ammeter reading is less than the standard current, replace the generator assembly.
  
  HINT:
  
  If the battery is fully charged, the ammeter reading may be less than the standard current. In this case, increase electrical load by operating devices such as the wiper motor and rear window defogger. Then, recheck the reading on the ammeter.