GENERATOR INSPECTION [L3]

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Generator warning light

1. Verify that the battery is fully charged.

2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION [L3].)

3. Turn the ignition switch to the ON position and verify that the generator warning light illuminates.

• If it does not illuminate, inspect the generator warning light and the wiring harness between the battery, generator warning light, and PCM terminal 61.
• If the generator warning light and the wiring harness are normal, inspect the PCM.

4. Verify that the generator warning light goes out after the engine is started.

• If it does not goes out, check if any one of the following DTCs in the on-board diagnostic system are displayed: P0112, P0113, P2502, P2503, P2504

Generator

Voltage

1. Verify that the battery is fully charged.

2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION [L3].)

3. Turn off all electrical loads.

4. Start the engine and verify that the generator rotates smoothly without any noise while the engine is running.

5. Measure the voltage at each terminal using a tester.

Standard

Terminal

IG-ON (V)

Idle (V) [20 °C {68 °F}]

B
B+
13.0-15.0
P
Approx. 1.0 or less
Approx. 3.0-8.0
D
Approx. 0

*

*: Turn the following electrical loads on and verify that the voltage reading increases.

• Headlights (high beam)
• Blower motor (MAX)
• Rear window defroster
• Brake light

Current

Note
• Since the charging current decreases rapidly after starting the engine, carry out the following procedure quickly, and read the maximum current value.

1. Verify that the battery is fully charged.

2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION [L3].)

3. Disconnect the negative battery cable.

4. Connect a tester capable of reading 120 A or more between generator terminal B and the wiring harness.

5. Connect the negative battery cable.

6. Turn off all electrical loads.

7. Start the engine.

8. Adjust the engine speed to the following:

Engine speed
2,500 rpm
Note
• When the electrical load of the vehicle is low, specified current cannot be verified although the generator is normal. In this case, increase the electrical load (turn on the headlights and leave them on for a while to discharge the battery) and recheck.
• When the generator itself or the ambient temperature are too high, specified current also cannot be verified. In this case, cool down the generator and recheck.

9. Turn the following electrical loads on and verify that the current reading increases more than the minimum value indicated below.

- If it is not as specified, go to the PCM and generator shearing inspection. (See PCM and generator shearing inspection (L3).)
• Headlight (high beam)
• Blower motor (MAX)
• Rear window defroster
• Brake light
Maximum
58 A [Ambient temp. 20 °C {68 °F}, generator terminal B voltage: 13.0-15.0 V, generator warm]

PCM and generator shearing inspection (L3)

1. Inspect the generator as follows:

STEP

INSPECTION

ACTION

1
Measure the generator terminal B voltage when the electrical loads *1 are on and off.
Above 15 V
Go to Step 2.
Between 13-15 V
Normal*2
Below 13 V
Go to Step 3.
2
Monitor the ALTTV PID using the WDS or equivalent. Or measure the voltage of PCM terminal 99 using a tester. Is the voltage between 13-15 V?
Yes
Go to Step 4.
No
PCM input error.
3
Monitor the ALTTV PID using the WDS or equivalent. Or, measure the voltage of PCM terminal 99 using a tester. Is the voltage between 13-15 V?
Yes
Go to Step 5.
No
PCM input error.
4
Monitor the ALTF PID using the WDS or equivalent. Or, calculate the duty value of PCM terminal 61 using an oscilloscope. Is the duty value 100 %?
Yes
PCM input error.
No
PCM, generator, or both are abnormal.

5
Monitor the ALTF PID using the WDS or equivalent. Or, calculate the duty value of PCM terminal 61 using an oscilloscope. Is the duty value 0 %?
Yes
PCM input error.
No
PCM, generator, or both are abnormal.

*1 :
Headlight, blower motor, rear defroster, brake light
*2 :
If the generator field coil duty value does not change when electrical loads (such as headlights, blower motor, rear window defroster, stop lamp) are on or off, inspection with discharged battery is needed.