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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1573 (6.7L Diesel - DTCS P065A To P209F - 2500 Hd) >> DTC Troubleshooting >> P1207-Generator 2 Control Circuit Open >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    Batteries must be fully charged and capable of passing a battery load test. The generator belt tension must be within specification. Inspect the vehicle for any aftermarket equipment that may exceed the maximum Generator output.

    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 return as Active or Pending?

      Yes 

      • Go To  2

      No 

  2. INSPECT THE GENERATOR TERMINALS FOR DIRTY OR LOOSE CONNECTIONS 
    NOTE:

    In a dual Generator system, this terminal inspection will have to be performed on both Generators.

    NOTE:

    In a dual Generator system, there is no 'Primary' or 'Secondary' Generator. Follow the wiring schematics and removal images to determine which Generator is being inspected.

    NOTE:

    In a dual Generator system, there is a right side Generator (GEN-1) and a left side Generator (GEN-2). This simply refers to the location in relation to the Engine (as the driver sits). In a single Generator system, there will only be one Generator located on the right side of the Engine. For location clarification, please refer to images shown in 6.7L DIESEL Refer to GENERATOR, REMOVALand/or  6.7L DIESEL-DUAL. Refer to GENERATOR, REMOVAL .

    1. Inspect for bent or loose terminals/connectors, signs of arcing, or other damage to the GEN-1 Generator electrical connections at the generator field, battery output, and ground terminal (if equipped) harness connectors and main B+ post. Also, check the generator ground wire connection at the engine (if equipped). They should all be clean and tight.
    2. Inspect for bent or loose terminals/connectors, signs of arcing, or other damage to the GEN-2 Generator (if equipped) electrical connections at the generator field, battery output, and ground terminal (if equipped) harness connectors and main B+ post. Also, check the generator ground wire connection at the engine (if equipped). They should all be clean and tight.

      Are the connections tight, free of damage, and show no signs of arcing or corrosion?

      Yes 

      • Go To  3

      No 

      • Clean, tighten, or replace the connections as needed. Then, perform the environmental conditions shown in When Monitored and Set Conditions to duplicate this DTC. If the DTC does not return, perform the Powertrain Verification Test. If the DTC returns, Go To  3
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  3. INSPECT THE BATTERY TERMINALS FOR DIRTY OR LOOSE CONNECTIONS 
    NOTE:

    In a dual Battery system, this visual inspection will have to be performed on both Batteries.

    NOTE:

    In a dual Battery system, the left side Battery is sometimes referred to as the 'Primary' Battery and the right side Battery is sometimes referred to as the 'Auxiliary' Battery. For location clarification, please refer to the image in Refer to BATTERY, DESCRIPTION .

    1. Visually inspect the positive and negative connections at the Battery.
    2. Visually inspect the Battery negative connections at the engine block.

      Are the connections tight and free of corrosion?

      Yes 

      • Go To  4

      No 

      • Clean and/or tighten the connections as needed. Then, perform the environmental conditions shown in When Monitored and Set Conditions to duplicate this DTC. If the DTC does not return, perform the Powertrain Verification Test. If the DTC returns, Go To  4
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. CHECK THE (A916) BATTERY SENSE CIRCUIT FOR A SHORT TO GROUND OR OPEN/HIGH RESISTANCE 
    NOTE:

    In a dual Battery system, the left side Battery is sometimes referred to as the 'Primary' Battery and the right side Battery is sometimes referred to as the 'Auxiliary' Battery. For location clarification, please Refer to BATTERY, DESCRIPTION .

    1. Using the scan tool, document the value of the Battery voltage showing within the PCM.
    2. Using a DMM, measure and document the voltage of the left side Battery.

      Is the scan tool Battery voltage value equal to the actual left side Battery voltage?

      Yes 

      • Go To  5

      No 

      • Repair the (A916) Battery Sense circuit for a short to ground or open/high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. COMPARE THE LEFT SIDE BATTERY AND THE RIGHT SIDE BATTERY VOLTAGE VALUES 
    1. Turn the ignition off.
      NOTE:

      In a dual Battery system, the left side Battery is sometimes referred to as the 'Primary' Battery and the right side Battery is sometimes referred to as the 'Auxiliary' Battery. For location clarification, please refer to the image in Refer to BATTERY, DESCRIPTION .

    2. Using a DMM, measure and document the voltage of the right side Battery.

      Is the scan tool Battery voltage value (documented in Test Step 3) equal to the actual right side Battery voltage?

      Yes 

      • Go To  7

      No 

      • Go To  6
  6. CHECK THE (A1) BATTERY B+ CROSSOVER CABLE FOR AN OPEN/HIGH RESISTANCE 
    NOTE:

    In a dual Battery system, the left side Battery is sometimes referred to as the 'Primary' Battery and the right side Battery is sometimes referred to as the 'Auxiliary' Battery. For location clarification, please refer to the image in Refer to BATTERY, DESCRIPTION .

    1. Perform a voltdrop test along the (A1) Battery B+ Crossover Cable. Measure the voltage holding the DMM test probes between the B+ post of the right side Battery and the B+ post of the left side Battery while the engine is running.

      Is the voltage above 0.4 Volts?

      Yes 

      • Repair the (A1) Battery B+ cross over cable for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  7
  7. CHECK THE (A12) GEN-2 B+ CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    NOTE:

    The GEN-2 B+ circuit may have a Maxi-fuse mounted in-line and located near the Battery.

    NOTE:

    In a dual Battery system, the left side Battery is sometimes referred to as the 'Primary' Battery and the right side Battery is sometimes referred to as the 'Auxiliary' Battery. For location clarification, please refer to the image in Refer to BATTERY, DESCRIPTION .

    NOTE:

    The Generator referred to as 'GEN-2' is located on the left side of the Engine. The other Generator (GEN-1) is located on the right side of the Engine.

    1. Perform a voltage drop test along the (A12) GEN-2 B+ circuit from the Generator 2 to the left side Battery. Measure the voltage holding the DMM test probes between the B+ post of the generator and the B+ post of the Battery while the engine is running.

      Is the voltage above 0.4 Volts?

      Yes 

      • Repair the (A12) GEN-2 B+ circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8
  8. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

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