Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc c1241 rear left abs sensor circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Vehicle dynamics control (vdc) (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc c1241 rear left abs sensor circuit

DTC DETECTING CONDITION:

Judge as malfunction when the current value of the wheel speed sensor is out of normal range for a predetermined time or more.

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

• Hill hold does not function.

• EyeSight does not operate. (Models with EyeSight)

NOTE:

This DTC may be stored when the wheel speed sensor connector is disconnected regardless of the ignition switch condition (ON/OFF). Perform the Clear Memory Mode after diagnosis if a DTC is recorded. Clear Memory Mode

WIRING DIAGRAM:

NOTE:

For the coupling connector, refer to “WIRING SYSTEM”.

Vehicle dynamics control system Vehicle Dynamics Control System

STEP	CHECK	YES	NO
1.CHECK POOR CONTACT OF CONNECTOR. Check if there is poor contact between VDCCM&H/U and ABS wheel speed sensor.	Is there poor contact-	Repair the connector.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT
2.CHECK HARNESS CONNECTOR BETWEEN VDCCM&H/U AND ABS WHEEL SPEED SENSOR (CHECK FOR OPEN CIRCUIT). 1) Turn the ignition switch to OFF. 2) Disconnect the connector (B310) from the VDCCM&H/U. 3) Disconnect the connector from ABS wheel speed sensor. 4) Measure the resistance between VDCCM&H/U connector and ABS wheel speed sensor connector. Connector & terminal DTC C1211 (B310) No. 37 — (B6) No. 1: (B310) No. 36 — (B6) No. 2: DTC C1221 (B310) No. 41 — (B15) No. 1: (B310) No. 40 — (B15) No. 2: DTC C1231 (B310) No. 42 — (R72) No. 1: (B310) No. 43 — (R72) No. 2: DTC C1241 (B310) No. 38 — (R73) No. 1: (B310) No. 39 — (R73) No. 2:	Is the resistance less than 1 --	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT	Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
3.CHECK GROUND SHORT OF HARNESS. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal DTC C1211 (B310) No. 36 — Chassis ground: DTC C1221 (B310) No. 40 — Chassis ground: DTC C1231 (B310) No. 42 — Chassis ground: DTC C1241 (B310) No. 38 — Chassis ground:	Is the resistance 1 M- or more-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT	Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
4.CHECK ABS WHEEL SPEED SENSOR POWER SUPPLY CIRCUIT. 1) Connect the VDCCM&H/U connector. 2) Connect the ABS wheel speed sensor connector. 3) Turn the ignition switch to ON. 4) Measure the voltage between ABS wheel speed sensor connector and chassis ground. Connector & terminal DTC C1211 (B6) No. 1 (+) — Chassis ground (−): DTC C1221 (B15) No. 1 (+) — Chassis ground (−): DTC C1231 (R72) No. 2 (+) — Chassis ground (−): DTC C1241 (R73) No. 2 (+) — Chassis ground (−):	Is the voltage 5 — 16 V-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT
5.CHECK VDCCM&H/U POWER SUPPLY CIRCUIT. 1) Turn the ignition switch to OFF. 2) Disconnect the VDCCM&H/U connector. 3) Turn the ignition switch to ON. 4) Measure the voltage between VDCCM&H/U connector terminals. Connector & terminal (B310) No. 5 (+) — (B310) No. 46 (−): (B310) No. 16 (+) — (B310) No. 46 (−): (B310) No. 33 (+) — (B310) No. 46 (−):	Is the voltage 10 — 15 V-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT	Check the generator, battery and VDCCM&H/U power supply circuit.
6.CHECK ABS WHEEL SPEED SENSOR SIGNAL. 1) Prepare an oscilloscope. 2) Check the ABS wheel speed sensor. Front ABS Wheel Speed Sensor > INSPECTION	Is the pattern the same waveform as shown in the figure-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT	Replace the ABS wheel speed sensor. Front ABS Wheel Speed Sensor
7.CHECK VDCCM&H/U. 1) Connect all connectors. 2) Perform the Clear Memory Mode. Clear Memory Mode 3) Perform the Inspection Mode. Inspection Mode 4) Read the DTC. Read Diagnostic Trouble Code (DTC)	Is the same DTC displayed-	Replace the VDCCM&H/U. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1241 REAR LEFT ABS SENSOR CIRCUIT
8.CHECK DETECTION OF OTHER DTCS FOR VDC. Read Diagnostic Trouble Code (DTC)	Is any other DTC displayed-	Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)	Currently, it is normal. There may have been a poor contact in the harness and connector or a temporarily noise interference.

Dtc c1242 rear left abs sensor signal

DTC DETECTING CONDITION:• A fault is detected if the time of decompression or hold exceeds the predetermined time.• A fault is detected if noise of the wheel speed sensor signal is detecte ...

Dtc c1232 rear right abs sensor signal

NOTE:For the diagnostic procedure, refer to “DTC C1242 REAR LEFT ABS SENSOR SIGNAL”. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C1242 REAR LEFT ABS SENSOR SIGNAL ...

Other materials:

Inspection
1. WIRING DIAGRAMRefer to “Seat Heater System” in the wiring diagram.• Front: Seat Heater System > WIRING DIAGRAM• Rear: Seat Heater System > WIRING DIAGRAM2. DIAGNOSTIC CHARTSymptomsRepair orderFront seat heater does not operate.Refer to “HVAC SYSTEM (DIAGNOSTICS)&rd ...