Diagnostic Test

ACTIVE DTC
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the Generator System output.
1. Ignition on, engine not running.
  NOTE: The battery must be fully charged.
  
  NOTE: The Generator belt tension and condition must be checked before continuing.
2. With a scan tool, read the DTCs.
3. With a scan tool, erase the DTCs.
4. Start the engine.
5. Allow the idle to stabilize.
6. With the scan tool, read the DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go to step 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
FUSED B+ CIRCUIT HIGH RESISTANCE
NOTE: Inspect the Generator harness connector and the Generator Eyelet for corrosion or damage before continuing.

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 may result in possible serious or fatal injury.
1. Ignition on, engine not running.
  NOTE: Make sure all wires are clear of the engines moving parts.
2. Measure the voltage between the Generator B+ Output Terminal and the Battery+ Post.
3. Start the engine.
  Is the voltage above 0.4 of a volt?
  
  Yes
  - Repair the excessive resistance in the battery positive circuit between the Generator and Battery.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
EXCESSIVE RESISTANCE IN THE CASE 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 may result in possible serious or fatal injury.
1. Start the engine.
2. Warm the engine to operating temperature.
  NOTE: Make sure all wires are clear of the engines moving parts.
3. Measure the voltage between the Generator Case and Battery ground post.
  Is the voltage above 0.1 of a volt?
  
  Yes
  - Repair the excessive resistance in the Generator Case Ground.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
(A803/A804) GEN SENSE CIRCUIT SHORTED TO BATTERY VOLTAGE

Fig 1: Checking Generator Sense Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Generator harness connector.
3. Disconnect the PCM C1 harness connector.
4. Turn the ignition on.
5. Measure the voltage on the (A803/A804) Gen Sense circuit in the Generator Field harness connector.
  Does the voltameter indicate voltage present?
  
  Yes
  - Repair the short to battery voltage in the (A803/A804) Gen Sense circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 5
INTERNAL HIGH RESISTANCE GENERATOR
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 may result in possible serious or fatal injury.
1. Turn the ignition off.
2. Reconnect the Generator harness connector.
3. Reconnect the PCM harness connector.
  NOTE: Make sure all wires are clear of the engines moving parts.
4. Measure the voltage between the Generator Eyelet terminal and the Gen Sense circuit in the Generator harness connector.
5. Start the engine.
  Is the voltage above 0.1 of a volt?
  
  Yes
  - Replace the Generator in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace the Powertrain Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .