Dodge ZB 2005 Service Manual page 1298

Symptom:
P1682-CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored and Set Condition:
P1682-CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored: With the ignition key on and the engine running over 1500 RPM after
25 seconds.
Set Condition: When the PCM regulates the generator field and there are no detected
field problems, but the voltage output does not increase.
CHARGING VOLTAGE BELOW 15.1 VOLTS
BATTERY TEMPERATURE SENSOR
RESISTANCE IN THE BATTERY POSITIVE CIRCUIT
(K125) GENERATOR FIELD SOURCE CIRCUIT OPEN
RESISTANCE IN THE GENERATOR GROUND
(K125) GENERATOR FIELD SOURCE CIRCUIT SHORTED TO GROUND
(K20) GENERATOR FIELD CONTROL CIRCUIT OPEN
RESISTANCE IN THE GENERATOR FIELD COIL
PCM
TEST
1 Turn the ignition off.
NOTE: Battery must be fully charged and capable of passing a battery load
test.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
NOTE: Inspect the vehicle for any aftermarket accessories that may exceed
the maximum Generator output.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Record all DTCs and the related Freeze Frame data.
With the DRBIII , read the target charging voltage.
Is the target charging voltage above 15.1 volts?
Yes → Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 3.
→ Go To 2
DRIVEABILITY - GAS
177
APPLICABILITY
All