Scheme 1
System Description
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged. The voltage output is controlled by the IC voltage regulator.
Scheme 2
Scheme 3
Component Description
| Component part | Description |
|---|---|
| Alternator | The alternator provides DC voltage to operate the vehicle electrical system and to keep the battery charged. |
| Combination meter (Charge warning lamp) | The IC voltage regulator warning function activates to illuminate the charge warning lamp, if any of the following symptoms occur while alternator is operating: Excessive voltage is produced. No voltage is produced. |
COMPONENT DESCRIPTION CHART
Scheme 4
By performing the power generation voltage variable control, the engine load due to the power generation of the alternator is reduced and fuel consumption is decreased.
Note. When any malfunction is detected in the power generation voltage variable control system, the power generation is performed according to the characteristic of the IC voltage regulator of the alternator.
Scheme 5
Scheme 6
| Component part | Description |
|---|---|
| Battery current sensor | Battery current sensor is installed to the battery cable at the negative terminal, and it detects the charging/discharging current of the battery and sends the voltage signal to ECM according to the current value. |
| ECM | Battery current sensor detects the charging/discharging current of the battery. ECM judges the battery condition based on this signal. ECM judges whether to perform the power generation voltage variable control according to the battery condition. When performing the power generation voltage variable control, ECM calculates the target power generation voltage according to the battery condition and sends the calculated value as the power generation command value to IPDM E/R. |
| IPDM E/R | IPDM E/R converts the received power generation command value into the power generation command signal (PWM signal) and sends it to the IC voltage regulator. |
| Alternator (IC voltage regulator) | IC voltage regulator controls the power generation voltage by the target power generation voltage based on the received power generation command signal. When there is no power generation command signal, the alternator performs the normal power generation according to the characteristic of the IC voltage regulator. |
COMPONENT DESCRIPTION CHART
Description
"B" terminal circuit supplies power to charge the battery and to operate the vehicle's electrical system.
The "L" terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the ignition switch is set to ON or START. When the alternator is providing sufficient voltage with the engine running, the charge warning lamp will go off. If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
The "L" terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the ignition switch is set to ON or START. When the alternator is providing sufficient voltage with the engine running, the charge warning lamp will go off. If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
The output voltage of the alternator is controlled by the IC voltage regulator at the "S" terminal detecting the input voltage.
The "S" terminal circuit detects the battery voltage to adjust the alternator output voltage with the IC voltage regulator.
See also:
• CONSULT-III FUNCTION