Chrysler PT Cruiser 2001 Service Manual Supplement page 2482

CHARGING
P1682-CHARGING SYSTEM VOLTAGE LOW —
TEST
4 Caution: KEEP CLEAR OF THE ENGINE'S MOVING PARTS.
Start the engine.
Turn on all accessories, manually set engine speed to 1600 RPM.
With DRBIII , read Target Charging and Charging voltage.
Compare the two readings.
Is there more than a 1.0 volt difference?
Yes → Go To 5
No
5 Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Generator Field harness connector.
Measure the Generator Field Driver Circuit from PCM Connector to ground.
Is the resistance below 5.0 ohms?
Yes → Repair the Generator Field Driver Circuit shorted to ground.
No
6 Turn the ignition off.
Remove the ASD Relay from the PDC.
Disconnect the generator field harness connector.
Note: Check Connectors - Clean/repair as necessary.
Measure the ASD Relay Output Circuit from ASD Relay cavity in PDC to ground.
Is the resistance below 5.0 ohms?
Yes → Repair the ASD Relay Output Circuit shorted to ground.
No
7 Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Generator Field harness connector.
Note: Check Connectors - Clean/repair as necessary.
Measure the Generator Field Driver Circuit from PCM to Generator.
Is the resistance below 5.0 ohms?
Yes → Go To 8
No
8 Start the engine.
Warm the engine to operating temperature.
Caution: Ensure all wires are clear of the engine's moving parts.
Measure voltage between the Generator case and Battery (-) Post.
Is the voltage above 0.1 volt?
Yes → Repair Generator Ground for high resistance, Generator Case to
No
ACTION
→ Go To 5
Perform POWERTRAIN VERIFICATION TEST VER - 3.
→ Go To 6
Perform POWERTRAIN VERIFICATION TEST VER - 3.
→ Go To 7
→ Repair the open Generator Field Driver Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
Battery (-) side.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
→ Go To 15
Continued
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APPLICABILITY
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