On-Vehicle Inspection [04/2013 - 08/2015]: Procedure

1. Check the battery for damage and deformation. If severe damage, deformation or a leak is found, replace the battery.
2. Check the electrolyte level in each cell.
   1. For maintenance-free batteries:
      • If the electrolyte level is below the lower line, replace the battery.
      • If the electrolyte level is above the lower line, check the battery voltage while cranking the engine. If the voltage is less than 9.6 V, recharge or replace the battery.

        HINT: 

        Before checking the battery voltage, turn off all the electrical systems (headlights, blower motor, rear defogger, etc.).

   2. For non-maintenance-free batteries:
      • If the electrolyte level is below the lower line, add distilled water to each cell. Then, recharge the battery and check the electrolyte specific gravity.

        Standard Specific Gravity

        1.25 to 1.29 at 20°C (68°F)

      • If the electrolyte level is above the lower line, check the battery voltage while cranking the engine. If the voltage is less than 9.6 V, recharge or replace the battery.

        HINT: 

        Before checking the battery voltage, turn off all the electrical systems (headlights, blower motor, rear defogger, etc.).

3. Check the voltage.
   1. Turn the engine switch off and turn on the headlights for 20 to 30 seconds. This will remove the surface charge from the battery.
   2. Measure the battery voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      Positive (+) terminal - Negative (-) terminal	20°C (68°F)	12.6 to 12.8 V

      If the voltage is not as specified, charge the battery.

1. Check that the battery terminals are not loose or corroded.

   If a terminal is loose or corroded, tighten or clean the terminal.

   Positive (+) Battery Terminal 

   Torque: 5.6 N.m (57 kgf/cm, 50 in.lbf) 

   Negative (-) Battery Terminal 

   Torque: 5.6 N.m (57 kgf/cm, 50 in.lbf) 

1. Measure the resistance of each fuse for the charging system.

   HINT: 

   The fuses shown in System Diagram are related to the charging system.

   Standard Resistance

   Below 1 Ω

   1. If any of the results is not as specified, replace the fuse(s) as necessary.

Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]

1. Visually check the generator wiring.
   1. Check that the wiring is in good condition.

1. Check for abnormal noises from the generator assembly.
   1. Check that no abnormal noises are heard from the generator assembly while the engine is running.

1. Turn the engine switch on (IG). Check that the charge warning light comes on.
2. Start the engine and check that the charge warning light goes off.

   If the light does not operate as specified, perform troubleshooting of the charge warning light circuit.

1. Connect a voltmeter and an ammeter to the charging circuit as follows.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Generator Assembly
   *2	Battery
   *a	Ammeter
   *b	Terminal B
   *c	Voltmeter

   1. Disconnect the wire from terminal B of the generator assembly and connect it to the negative (-) lead of the ammeter.
   2. Connect the ammeter positive (+) lead to terminal B of the generator assembly.
   3. Connect the voltmeter positive (+) lead to the positive (+) terminal of the battery.
   4. Ground the voltmeter negative (-) lead.
2. Check the charging circuit.
   1. With the engine running at 2000 rpm, check the readings on the ammeter and voltmeter.

      Standard Current

      10 A or more

      Standard Voltage

      12.1 to 15.4 V

      If the result is not as specified, repair or replace the generator assembly.

      HINT: 

      If the battery is not fully charged, the ammeter reading will sometimes be more than the standard current.

1. With the engine running at 2000 rpm, turn the high beam headlights on 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 result is not as specified, repair or replace the generator assembly.

   HINT: 

   If the battery is fully charged, the reading will sometimes be less than the standard current. If this is the case, add more electrical load (operate the wipers, rear window defogger, etc.) and check the reading on the ammeter again.