Hands Free Module (Hfm) - Electrical Diagnostics: Diagnosis

Hands Free Module (Hfm) - Electrical Diagnostics: Diagnosis RAM Pickup 2500

DIAGNOSTIC CODE INDEX

DTC	Description
B143B	MICROPHONE 1 CIRCUIT LOW
B143C	MICROPHONE 1 CIRCUIT HIGH
B143E	MICROPHONE 2 CIRCUIT LOW
B143F	MICROPHONE 2 CIRCUIT HIGH
U0010	CAN INTERIOR BUS
U0141	LOST COMMUNICATION WITH IPM (FCM/TIPM)
U0155	LOST COMMUNICATION WITH CLUSTER/CCN
U0184	LOST COMMUNICATION WITH RADIO

DIAGNOSTIC CODE INDEX

Scheme 172: B143B-MICROPHONE 1 CIRCUIT LOW

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

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. Using the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0010-CAN INTERIOR BUS»(ref-457926-S01022139122012030200000) for 1500, 2500 and 3500 or «U0010-CAN INTERIOR BUS»(ref-457927-S08979577912012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 1500, 2500 and 3500 or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure.

VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(ref-457926-S24039559512012030200000) for 1500, 2500 and 3500 or «U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM)»(ref-457927-S04407950332012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 1500, 2500 and 3500 or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure.

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «U0155-LOST COMMUNICATION WITH CLUSTER/CCN»(ref-457926-S20590538232012030200000) for 1500, 2500 and 3500 «U0155-LOST COMMUNICATION WITH CLUSTER/CCN»(ref-457927-S23699983282012030200000) or for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 1500, 2500 and 3500 or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure.

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read the active DTCs. Is this DTC active? Yes Refer to «U0184-LOST COMMUNICATION WITH RADIO»(ref-457926-S04072053652012030200000) for 1500, 2500 and 3500 or «U0184-LOST COMMUNICATION WITH RADIO»(ref-457927-S32606774262012030200000) for 3500 Cab and Chassis, 4500 and 5500. diagnostic procedure. No Refer to «STORED LOST COMMUNICATION DTCS»(ref-457934-S05707347042012030200000) for 1500, 2500 and 3500 or «STORED LOST COMMUNICATION DTCS»(ref-457935-S26988435972012030200000) for 3500 Cab and Chassis, 4500 and 5500 diagnostic procedure.