Diagnostic Test

1) ACTIVE DTC
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the Generator System output.

NOTE: The battery must be fully charged.

NOTE: The Generator belt tension and condition must be checked before continuing.

Ignition on, engine not running.

With a scan tool, select View DTCs and record the related Freeze Frame data.

With a scan tool, erase DTCs.

Start the engine.

Allow the idle to stabilize.

Ignition on, engine not running.

With the scan tool, select View DTCs.

Is the DTC Active at this time?

Yes
1. Go to 2).
No
1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
2) FUSED B+ CIRCUIT HIGH RESISTANCE

Fig 1: Checking B+ Circuit For High Resistance
Courtesy of CHRYSLER LLC

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.

Ignition on, engine not running.

Measure the voltage between the Generator B+ Output Terminal and the Battery + Post.

Start the engine.

Is the voltage above 0.4 of a volt?

Yes
1. Repair the excessive resistance in the battery positive circuit between the Generator and Battery.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 3).
3) GENERATOR OPERATION

Fig 2: Probing Generator Field Control Circuit At Generator Field Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Generator Field harness connector.

Using a 12-volt test light connected to ground, probe (K125) Generator Field Control circuit in the Generator Field harness connector.

Ignition on, engine not running.

With a scan tool, actuate the Generator Field Driver.

Does the test light illuminate brightly and flash on and off?

Yes
1. Replace the Generator.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 4).
4) PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Were there any problems found?

Yes
1. Repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module per Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .