Toyota Corolla 2004 Repair Manual - CHARGING SYSTEM

–STARTING & CHARGING CHARGING SYSTEM

ON–VEHICLE INSPECTION

1. CHECK BATTERY ELECTROLYTE LEVEL

(a) Check the electrolyte quantity of each cell (Maintenance–Free Battery).

(1) If under the lower level, replace the battery (or add distilled water if possible) and check the charg-

ing system.

(b) Check the electrolyte quantity of each cell (Except Maintenance–Free Battery).

(1) If under the lower level, add distilled water.

2. CHECK BATTERY SPECIFIC GRAVITY
(Except Maintenance–Free Battery)

(a) Check the specific gravity of each cell.

Standard specific gravity: 1.25 – 1.29 at 20C (68F)

HINT:
If the specific gravity is less than specification, charge the bat­tery.

19–13

190C9–01

A01259

3. CHECK BATTERY VOLTAGE

(a) After having driven the vehicle and in the case that 20

minutes have not passed after having stopped the en­gine, turn the ignition switch ON and turn on the electrical
system (headlight, blower motor, rear defogger etc.) for
60 seconds to remove the surface charge.

(b) Turn the ignition switch OFF and turn off the electrical sys-

tems.

A01260

(c) Measure the battery voltage between the negative (–)

and positive (+) terminals of the battery.

Standard voltage: 12.5 – 12.9 V at 20C (68F)

HINT:
If the voltage is less than specification, charge the battery.

(d) Check the indicator as shown in the illustration.
HINT:

White RedBlue

 Blue: OK
 White: Charging Necessary
 Red: Insufficient Water

Z11580

4. CHECK BATTERY TERMINALS, FUSIBLE LINK AND FUSES

(a) Check that the battery terminals are not loose or corroded.
(b) Check the fusible link, H–fuses and fuses for continuity.

2004 COROLLA (RM1037U)

1222Author: Date:

19–14

–STARTING & CHARGING CHARGING SYSTEM

5. INSPECT DRIVE BELT

(a) Visually check the belt for excessive wear, frayed cords

etc.

HINT:

 If any defect has been found, replace the drive belt.
 Cracks on the rib side of a belt are considered acceptable.

If the belt has chunks missing from the ribs, it should be
replaced.

B00543

(b) Check that it fits properly in the ribbed grooves.
HINT:
Check with your hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.

B00540

6. VISUALLY CHECK ALTERNATOR WIRING

(a) Check that the wiring is in good condition.

7. LISTEN FOR ABNORMAL NOISES FROM ALTERNATOR

(a) Check that there is no abnormal noise from the alternator while the engine is running.

8. INSPECT CHARGE WARNING LIGHT CIRCUIT

(a) Turn the ignition switch ON. Check that the charge warning light comes on.
(b) Start the engine. Check that the light goes off.
HINT:
If the light does not operate as specified, troubleshoot the charge warning light circuit.

9. INSPECT CHARGING CIRCUIT WITHOUT LOAD

(a) If a battery/alternator tester is available, connect the tes-

ter to the charging circuit as permanufacturer’s instruc­tions.

Ammeter

Disconnect Wire
from Terminal B

(b) If a tester is not available, connect a voltmeter to the

charging circuit as follows.
(1) Disconnect to the wire from terminal B of the alter-

nator and connect it to the negative (–) lead of the

Battery

ammeter.

(2) Connect the positive (+) lead of the ammeter to ter-

Alternator

Voltmeter

CH0732

minal B of the alternator.

(3) Connect the positive (+) lead of the voltmeter to ter-

minal B of the alternator.

(4) Ground the negative (–) lead of the voltmeter.

2004 COROLLA (RM1037U)

1223Author: Date: