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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 125 (Ignition System - Electrical Diagnostics) >> Ignition System - Electrical Diagnostics >> DTC Troubleshooting >> B218C-Ignition Run Control 2 Circuit OVERCURRENT >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK FOR ACTIVE DTC 

    With the scan tool, read the active DTC's.

    Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 10 seconds.

    With the scan tool, read the active DTC's.

    Does the scan tool display this DTC as active? 

    Yes 

    1. Go To  2).

    No 

    1. If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. 2)  INSPECT THE TIPM & HEATED SEAT MODULE TERMINALS & WIRE HARNESS FOR A CONDITION CAUSING HIGH CIRCUIT RESISTANCE 
    Fig 1: TIPM C8 Harness Connector & Heated Seat Module Harness Connector
    GC0043571Courtesy of DAIMLERCHRYSLER CORP.

    Disconnect the TIPM C8 harness connector.

    Disconnect the Heated Seat Module harness connector.

    Inspect the connector terminal for signs of corrosion build up and damage.

    Visually inspect the wiring harness for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

    Were any of the above conditions found? 

    Yes 

    1. Repair as necessary.
    2. Perform BODY VERIFICATION TEST - VER 1. Refer to BODY VERIFICATION TEST - VER 1 .

    No 

    1. Go To  3).
  3. 3)   CHECK THE (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT FUNCTION
    Fig 2: Probing Fused Ignition Switch Output (Run) Circuit
    GC0043572Courtesy of DAIMLERCHRYSLER CORP.

    Connect one end of a jumper wire to the (F937) Fused Ignition Switch Output (RUN) circuit at the Heated Seat Module harness connector, and connect the other end to a clean chassis ground.

    NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to battery.

    Using a 12 volt test light connected to 12 volts, probe the (F937) Fused Ignition Switch Output (RUN) circuit in the TIPM C8 harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the (F937) Fused Ignition Switch Output (RUN) circuit for high resistance.
    2. Perform BODY VERIFICATION TEST - VER 1. Refer to BODY VERIFICATION TEST - VER 1 .
  4. 4)   CHECK THE OUTPUT FROM THE TIPM ON THE (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT
    Fig 3: Probing Fused Ignition Switch Output (Run) Circuit
    GC0043573Courtesy of DAIMLERCHRYSLER CORP.

    Reconnect the TIPM C8 harness connector.

    Turn the ignition on.

    Using a 12 volt test light connected to ground, probe the (F937) Fused Ignition Switch Output (RUN) circuit in the Heated Seat Module harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Replace the Heated Seat Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1. Refer to BODY VERIFICATION TEST - VER 1 .

    No 

    1. Replace the TIPM in accordance with the service information
    2. Perform BODY VERIFICATION TEST - VER 1. Refer to BODY VERIFICATION TEST - VER 1 .
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