Avenger L4-2.0L DOHC (1995)
Voltage Signal: Description and Operation
Charging System Voltage Too Low
NAME OF CODE:
Charging System Voltage Too Low
WHEN MONITORED:
With the ignition key ON and the engine running above 1500 RPM for 1 minute.
SET CONDITION:
With no other charging system codes set. The battery sensed voltage is below the charging goal. The PCM senses the battery voltage, turns off the
field driver and senses the battery voltage again. If the voltages are the same the code is set.
THEORY OF OPERATION:
The PCM tries to maintain a system voltage between 12.9 volts and 15.0 volts. The voltage determined by the PCM as the final goal for the
charging system is called "control voltage. This control voltage is determined from the battery temp sensor for ambient sensor and the sensed
voltage system voltage at PCM pin # 11. The control voltage is compared to the sensed voltage continuously during running. If the sensed voltage
is less than the control voltage the PCM will supply more ground to the field circuit. If the sensed voltage is more than the control voltage the
PCM will supply less ground to the field circuit.
POSSIBLE CAUSES:
-
Defects in generator drive belt or adjustment
-
High resistance between battery B(+) and generator B(+)
-
High resistance between battery B(-) and generator B(-)
-
PCM failure
