Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc c2521 speed abnormal

Subaru Legacy BN/BS (2015-2019) Service Manual / Tire pressure monitoring system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc c2521 speed abnormal

DTC DETECTING CONDITION:

Detected when transmitter normal signal is received at a vehicle speed of less than 6 km/h (4 MPH).

TROUBLE SYMPTOM:

Tire pressure warning light blinks 25 times and then illuminates.

WIRING DIAGRAM:

NOTE:

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

Tire Pressure Monitoring System Tire Pressure Monitoring System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK LAN COMMUNICATION. Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE	Is there any fault-	Repair it according to the diagnosis for LAN system.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C2521 SPEED ABNORMAL
2.CHECK HARNESS (OPEN CIRCUIT). Measure the resistance between TPMS & keyless entry CM or TPMS CM and body integrated unit. Connector & terminal Without push button start (R221) No. 11 — (i81) No. 10: (R221) No. 5 — Chassis ground: With push button start (R211) No. 11 — (i81) No. 10: (R211) No. 5 — Chassis ground:	Is the resistance less than 10 --	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C2521 SPEED ABNORMAL	Repair the harness.
3.CHECK CONNECTOR. Check each connector.	Is there poor contact or any other faults-	Repair the connector.	Replace the TPMS & keyless entry CM or TPMS CM. Tire Pressure Monitoring System

Diagnostic procedure with diagnostic trouble code (dtc)

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Dtc c2021 tire 1 air pressure low (normal mode)

NOTE:Refer to DTC C2024 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C2024 TIRE 4 AIR PRESSURE LOW (NORMAL MODE) ...

Other materials:

Inspection
1. CHECK FUSE1. Remove the fuse and inspect visually.2. If the fuse is blown out, replace the fuse.NOTE:If the fuse is blown again, check the system wiring harness.2. CHECK RELAY1. Measure the resistance between relay terminals.Terminal No.Inspection conditionsStandardCircuit1 — 2Always1 M- or mor ...