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 MANUALSJEEP2009PATRIOT LIMITED, ED3, AWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSHANDS FEED MODULE (HFM) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB143C-MICROPHONE 1 CIRCUIT HIGHDIAGNOSTIC TEST

2009 Jeep Patriot Limited, ED3, AWD, Standard

Diagnostic Test

2009 Jeep Patriot Limited, ED3, AWD, StandardSECTION Diagnostic Test

CHECK FOR ACTIVE DTC
1. With the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
3. Attempt to make a phone call with the system.
4. With the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 2
  No
  - If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
INSIDE REARVIEW MIRROR

Fig 1: DISCONNECT THE REARVIEW MIRROR
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Rearview Mirror C2 harness connector.
3. Turn the ignition on.
4. With the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 3
  No
  - Replace the Rearview Mirror in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
(X712) MICROPHONE CIRCUITS SHORTED TO VOLTAGE

Fig 2: CHECKING MICROPHONE CIRCUITS FOR SHORT TO VOLTAGE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Hands Free Module harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (X712) Microphone circuit.
  Is the voltage above 1.0 volt?
  
  Yes
  - Repair the (X712) Microphone 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 4
(X712) MICROPHONE 1 IN (+) CIRCUIT OPEN

Fig 3: CHECKING MICROPHONE 1 IN (+) CIRCUIT FOR OPEN
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (X712) Microphone 1 IN (+) circuit between the HFM connector and the inside rearview mirror connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace the Hands Free Module 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 (X712) Microphone 1 IN (+) circuit for an open.
  - 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.