Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSJEEP2009WRANGLER X, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINTERIOR/ILLUMINATION LIGHTS(CABIN COMPARTMENT NODE (CCN) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGP0928-BTSI CONTROL CIRCUITDIAGNOSTIC TEST

2009 Jeep Wrangler X, Automatic

Diagnostic Test

2009 Jeep Wrangler X, AutomaticSECTION Diagnostic Test

CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go to step 2
  No
  - 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 chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
BTSI SOLENOID

Fig 1: Identifying Shift Lever Assembly Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Shift Lever Assembly harness connector.
3. Turn the ignition on.
4. Press the brake pedal.
5. Using a 12-volt test light connected to ground, measure the voltage of the (K321) BTSI Unlock Signal circuit.
  Does the test light illuminate brightly when the brake pedal is depressed?
  
  Yes
  - Go to step 3
  No
  - Go to step 4
BTSI SOLENOID GROUND CIRCUITS

Fig 2: Checking Appropriate Ground Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Using a test light connected to B+. Measure the resistance between ground and the Ground circuit in the Shift Lever Assembly harness connector.
  Does the test light illuminate brightly for each circuit?
  
  Yes
  - Replace the Shift Lever Assembly in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the appropriate ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(K321) BTSI UNLOCK SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 3: Checking BTSI Unlock Signal Circuit Short To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, measure the voltage of the (K321) BTSI Unlock Signal circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the (K321) BTSI Unlock Signal circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 5
(K321) BTSI UNLOCK SIGNAL SHORTED TO GROUND

Fig 4: Checking BTSI Unlock Signal Shorted To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Using a test light connected to B+, measure the resistance between ground and the (K321) BTSI Unlock Signal circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the (K321) BTSI Unlock Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 6
(K321) BTSI UNLOCK SIGNAL CIRCUIT OPEN

Fig 5: Checking BTSI Unlock Signal Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K321) BTSI Unlock Signal circuit.
  Is the resistance above 10K Ohms?
  
  Yes
  - Repair the (K321) BTSI Unlock Signal for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.