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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 435 (6.7L Diesel - DTCS P1209 To P2281 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P1209 Generator 2 Control Circuit Short To Battery >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, erase DTCs.
    3. Turn the ignition off for 75 seconds.
    4. Start the engine and let idle for up to five minutes.
    5. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K20AB) GENERATOR FIELD CONTROL 2 CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Turn the ignition on.
    4. Measure the voltage on the (K20AB) Generator Field Control 2 circuit at the Generator harness connector.

      Is there any voltage present?

      Yes 

      • Go To  3

      No 

      • Go To  4
  3. CHECK THE GENERATOR FOR A SHORT TO VOLTAGE 
    1. Disconnect the Generator 2 field harness connector.
    2. Turn the ignition on.
    3. Measure the voltage on the (K20AB) Generator Field Control 2 circuit at the Generator 2 harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (K20AB) Generator Field Control 2 circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Replace Generator 2 in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  4. CHECK THE (K20AB) GENERATOR FIELD CONTROL 2 CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (K20AB) Generator Field Control 2 circuit between the Generator 2 harness connector and the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Replace the Powertrain Control Module in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Repair the (K20AB) Generator Field Control 2 circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
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