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Home >> Jeep >> 2008 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition Control - Electrical Diagnostics >> Ignition Control- Electrical Diagnostics >> DTC Troubleshooting >> B2101-Ignition Run/Start Input Circuit Low >> Diagnostic Test
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Diagnostic Test

  1. CHECK FOR ACTIVE DTC 

    Turn the ignition on.

    With a scan tool, read, record and erase TIPM DTCs.

    Turn the ignition off for 30 seconds, then back on.

    Using the scan tool, read TIPM DTCs.

    Does the scan tool display this DTC as active? 

    Yes 

    1. Go To  2.

    No 

    1. The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  2. (F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN 
    Fig 1: Using 12-Volt Test Light Connected To Ground To Probe (F20) Ignition Switch Output (Run-Start) Circuit In TIPM C7 Harness Connector
    GC0061563Courtesy of CHRYSLER LLC
    NOTE: Check the related fuse (TIPM 46) to the (F20) Ignition Switch Output (Run-Start) circuit. If blown, use the wiring diagrams as a guide to make necessary repairs.

    Turn the ignition off.

    Disconnect the TIPM C7 harness connector.

    Turn the ignition on.

    Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch output (Run-Start) circuit in the TIPM C7 harness connector.

    Does the test light illuminate brightly? 

    Yes 

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

    No 

    1. Repair the (F20) Ignition switch output circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .