Subaru 2009 IMPREZA Service Manual page 2247

TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
4. Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
Terminal
Measured value
No.
1 Select monitor communication
2 Tire pressure warning light output
4 Speed sensor signal
5 Ignition power supply
6 Battery power supply
Body integrated unit (Hazard output
8
signal).
9 GND
Control Module I/O Signal
Measuring condition
Serial communication
Illuminate when malfunction occurs, or
tire pressure decreases
While driving (Pulse signal)
IG switch ON (Battery voltage)
Battery voltage
0 V (Always)
TPM(diag)-6
System failure: blinks 25 times
illuminates
Tire pressure decreases: turns on
Change according to vehicle
speed
Always
— When hazard turns on.
Always
Remarks
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