Chrysler PT Cruiser 2001 Service Manual Supplement page 2481

Symptom:
P1682-CHARGING SYSTEM VOLTAGE LOW
B (+) CIRCUIT HIGH RESISTANCE
GENERATOR GROUND HIGH RESISTANCE
ASD RELAY OUTPUT CIRCUIT OPEN
ASD RELAY OUTPUT CIRCUIT SHORTED TO GROUND
GENERATOR FIELD DRIVER CIRCUIT OPEN
GENERATOR FIELD DRIVER CIRCUIT SHORTED TO GROUND
PCM
PCM (CHARGING SYSTEM VOLTAGE LOW)
TEST
1 Ignition on, engine not running.
With the DRBIII , actuate the Generator Field.
Measure the voltage at both Generator Field Terminals.
Is the voltage below 3.0 volts at either Terminal?
Yes → Go To 2
No
2 Ignition on, engine not running.
With the DRBIII , record all DTC's and freeze frame data, then erase Codes.
Carefully inspect all Connectors for corrosion or spread Terminals before continuing.
With the DRBIII actuate the Generator Field Driver Circuit.
Backprobe the ASD Relay Output Circuit at back of Generator.
Is the voltage above 10.0 volts?
Yes → Go To 3
No
3 Turn the ignition off.
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
Start the engine.
With theDRBIII , read the target charging voltage.
Is the target charging voltage above 15.1 volts?
Yes → Go To 4
No
POSSIBLE CAUSES
ACTION
→ Go To 16
→ Repair the open ASD Relay Output Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
→ Go To 9
21
CHARGING
APPLICABILITY
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All
All