Subaru Legacy BN/BS (2015-2019) Service Manual: General diagnostic table inspection

Subaru Legacy BN/BS (2015-2019) Service Manual / Tire pressure monitoring system (diagnostics) / General diagnostic table inspection

Symptoms		Faulty parts
Tire pressure warning light illuminates.	Tire pressure is reduced.	• Improper tire pressure adjustment • Punctured tire
Tire pressure warning light blinks 25 times and then illuminates.	Tire pressure monitoring system has malfunction.	• Air pressure sensor malfunction • Air pressure sensor is out of battery. • Defective TPMS & keyless entry CM or TPMS CM • Defective vehicle harness • Defective combination meter
Tire pressure is dropping but the warning light does not illuminate.	Tire pressure warning light does not illuminate.	• Air pressure sensor is faulty. • Defective TPMS & keyless entry CM or TPMS CM • Defective combination meter

Electrical component location location

(1)Tire pressure warning light(2)TPMS & keyless entry CM*1 or TPMS CM*2(3)Snap-in type transmitter*1: Without push button start*2: With push button start ...

Inspection mode procedure

Reproduce the malfunction occurrence condition as much as possible. Drive the vehicle at 40 km/h (25 MPH) or faster for at least ten minutes. ...

Other materials:

Inspection
1. Check if there is anything that affects sensing, around the sunload sensor.(1) Is the sunload sensor free from any object that disturbs sensing-(2) Is the windshield glass free from any object such as sticker or film that disturbs sensing-• Yes > Go to step 2).• No > Remove everything ...