Dodge Caliber. Manual — part 899
3.
EXCESSIVE RESISTANCE BETWEEN THE GENERATOR CASE AND GROUND
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
NOTE: Make sure all test equipment and cables are clear of any belts, pulleys, or other moving parts.
Monitor the voltage between the generator case and battery ground (-) post.
Start the engine and allow it to reach operating temperature.
Is the voltage above 0.1 volts?
Yes
>> Repair the excessive resistance in the Generator Case Ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 4
4.
(K20) GEN FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Generator harness connector.
Disconnect the Powertrain Control Module (PCM) harness connector.
Turn the ignition on.
Measure the voltage of the (K20) Gen Field Control circuit.
Is there any voltage present?
Yes
>> Repair the (K20) Gen Field Control circuit for a short to volt-
age.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 5
5.
(K20) GEN FIELD CONTROL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (K20) Gen Field Con-
trol circuit in the Generator harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (K20) Gen Field Control
circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 6
PM
ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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6.
(K20) GEN FIELD CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K20) Gen Field Control circuit between
the Generator harness connector and the Powertrain Control Module
(PCM) harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go to 7
No
>> Repair the open in the (K20) Gen Field Control circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
7.
(A804) GEN SENSE CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (A804) Gen Sense between the Gener-
ator harness connector and the Powertrain Control Module (PCM) har-
ness connector.
Is the resistance above 5.0 ohms?
Yes
>> Go to 8
No
>> Repair the (A804) Gen Sense circuit for an open circuit or
high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
8.
GENERATOR
Turn the ignition off.
Connect the Powertrain Control Module (PCM) harness connector.
Turn the ignition on.
With a scan tool, actuate the Generator Field to toggle on and off.
Using a 12-volt test light connected to ground, check the (K20) Gen Field Control in the Generator harness con-
nector.
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
PM
NOTE: The test light should be illuminated and bright when toggled on. Compare the brightness to that of
a direct connection to the battery.
Does the test light toggle on and off correctly during the actuator test?
Yes
>> Replace the Generator in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 9
9.
POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the
Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
PM
ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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P2504-CHARGING SYSTEM OUTPUT HIGH
For a complete wiring diagram Refer to Section 8W.
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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