Subaru LEGACY 2006 Manual page 4121

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Q: DTC 51 FL TRANSMIT BATTERY LOW VOLTAGE
NOTE:
Refer to DTC 54 for the diagnostic procedure. <Ref. to TPM(diag)-35, DTC 54 RL TRANSMIT BATTERY
LOW VOLTAGE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
R: DTC 52 FR TRANSMIT BATTERY LOW VOLTAGE
NOTE:
Refer to DTC 54 for the diagnostic procedure. <Ref. to TPM(diag)-35, DTC 54 RL TRANSMIT BATTERY
LOW VOLTAGE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
S: DTC 53 RR TRANSMIT BATTERY LOW VOLTAGE
NOTE:
Refer to DTC 54 for the diagnostic procedure. <Ref. to TPM(diag)-35, DTC 54 RL TRANSMIT BATTERY
LOW VOLTAGE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
T: DTC 54 RL TRANSMIT BATTERY LOW VOLTAGE
DTC DETECTING CONDITION:
Low battery signals received 20 times from each transmitter.
TROUBLE SYMPTOM:
Tire pressure warning light blinks.
Step
1 CHECK TRANSMITTER.
1) Replace all transmitters and register their
IDs. <Ref. to TPM(diag)-9, REGISTER
TRANSMITTER ID, OPERATION, Subaru
Select Monitor.>
2) Perform the Clear Memory Mode, and per-
form driving test.
TIRE PRESSURE MONITORING SYSTEM (DIAGNOSTICS)
Check
Is the fault eliminated?
TPM(diag)-35
Yes No
Internal battery of Replace the tire
the transmitter had pressure monitor-
worn out. ing control module.
<Ref. to WT-11,
REMOVAL, Tire
Pressure Monitor-
ing System.>