Hands Free Module (Hfm) - Electrical Diagnostics: Other Jeep Compass I рестайлинг

When Monitored

With the ignition on.

Set Condition

The Hands Free Module detects a fault in any of the microphone circuits.

Possible Causes

Scheme 121

Scheme 122

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 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.
2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror C2 harness connector. Turn the ignition on. With the scan tool, read the DTCs. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
3. (X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Hands Free Module harness connector. Measure the resistance between ground and the (X712) Microphone 1 IN (+) circuit. Is the resistance below 10K ohms? Yes Repair the (X712) Microphone 1 IN (+) circuit for short to ground. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Replace the Hands Free Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .

B143C-MICROPHONE 1 CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Hands Free Module detects a fault in any of the microphone circuits.

Scheme 123

Scheme 124

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror C2 harness connector. Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
3. (X712) MICROPHONE CIRCUITS SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Hands Free Module harness connector. Turn the ignition on. 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Go To 4 .
4. (X712) MICROPHONE 1 IN (+) CIRCUIT OPEN Turn the ignition off. 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Repair the (X712) Microphone 1 IN (+) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .

B143E-MICROPHONE 2 CIRCUIT LOW

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Hands Free Module detects a fault in any of the microphone circuits.

Scheme 125

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror C2 harness connector. Turn the ignition on. With the scan tool, read the DTCs. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
3. (X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Hands Free Module harness connector. Measure the resistance between ground and the (X722) Microphone 2 IN (+) circuit. Is the resistance below 10K ohms? Yes Repair the (X722) Microphone 2 IN (+) circuit for short to ground. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Replace the Hands Free Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .

B143F-MICROPHONE 2 CIRCUIT HIGH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The Hands Free Module detects a fault in any of the microphone circuits.

Scheme 126

Scheme 127

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror C2 harness connector. Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
3. (X722) MICROPHONE CIRCUITS SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Hands Free Module harness connector. Turn the ignition on. Measure the voltage of the (X722) Microphone circuit. Is the voltage above 1.0 volt? Yes Repair the (X722) Microphone circuit for a short to voltage. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Go To 4 .
4. (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (X722) Microphone 2 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Repair the (X722) Microphone 2 IN (+) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .

With the ignition on.

The Hands Free Module will receive and monitor the VIN message from the PCM. The Hands Free Module will set this code if the VIN recorded in the module is different from the VIN message received from the PCM.

Continuously

Whenever the CAN B Bus (+) or CAN B Bus (-) circuit is open, shorted to voltage or shorted to ground.

Scheme 128

Scheme 129

1. CHECK FOR ACTIVE DTCS With the scan tool, read the active DTCs. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go To 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 «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
2. CHECK THE TOTALLY INTEGRATED POWER MODULE DTCs With the scan tool, read the Totally Integrated Power Module active DTCs. Does the scan tool display any CAN B BUS DTCs - ACTIVE? Yes Refer to «Diagnosis and Testing»(ref-462530-S10097045382012040500000) . No Go To 3 .
3. (D55) CAN B BUS (+) CIRCUIT OPEN Turn the ignition off. Disconnect the negative battery cable. Disconnect the Hands Free Module harness connector. Disconnect the Totally Integrated Power Module harness connector. Measure the resistance of the (D55) CAN B Bus (+) circuit between the Totally Integrated Power Module connector and the Hands Free Module connector. Is the resistance below 2.0 ohms? Yes Go To 4 . No Repair the (D55) CAN B Bus (+) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .
4. (D54) CAN B BUS (-) CIRCUIT OPEN Measure the resistance of the (D54) CAN B Bus (-) circuit between the Totally Integrated Power Module connector and the Hands Free Module connector. Is the resistance below 2.0 ohms? Yes Replace the Hands Free Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) . No Repair the (D54) CAN B Bus (-) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «STANDARD PROCEDURE - BODY VERIFICATION TEST»(ref-462532-S42471902512012040500000) .

Continuously when the ignition is on.

The battery voltage between 10.0 and 16.0 Volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Totally Integrated Power Module (TIPM) for approximately two to five seconds.

Continuously when the ignition is on.

The battery voltage is between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Instrument Cluster (CCN) for approximately two to five seconds.

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fused installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Radio for approximately two to five seconds.