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Check Transmitter Battery And Function

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Be sure to reset the keyless transmitter of other vehicle which is registered to the inspection target vehicle, and the vehicle to which the keyless transmitter is registered for inspection, to the condition before performing the inspection. (Register the keyless transmitter again.)
Step Check Yes No
1 CHECK TRANSMITTER BATTERY. 
  1. Remove the battery from the transmitter. Refer to REMOVAL , Transmitter.
  2. Check the battery voltage. Refer to INSPECTION , Transmitter.
Is the voltage 2.5 V or more? Go to step 2.  Replace the transmitter battery. Refer to Transmitter .
2 CHECK KEYLESS TRANSMITTER BATTERY. 
Register the keyless transmitter which operates normally on other vehicles to the inspection target vehicle. Refer to REGISTRATION OF KEYLESS TRANSMITTER WITH SUBARU SELECT MONITOR , REPLACEMENT, Transmitter.
  1. Close all the doors and rear gate of inspection target vehicle.
  2. Remove the key from ignition switch.
  3. Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.
Is the inspection target vehicle operates lock and unlock normally? Go to step 3.  Due to vehicle malfunction, continue the keyless entry system diagnosis.
3 CHECK KEYLESS TRANSMITTER BATTERY. 
Register the keyless transmitter of inspection target vehicle to the another vehicle which the keyless system operates normally. Refer to REGISTRATION OF KEYLESS TRANSMITTER WITH SUBARU SELECT MONITOR , REPLACEMENT, Transmitter.
Is the keyless transmitter registered correctly? Go to step 4.  Replace the transmitter. Refer to REGISTRATION OF KEYLESS TRANSMITTER WITH SUBARU SELECT MONITOR , REPLACEMENT, Transmitter.
4 CHECK KEYLESS TRANSMITTER BATTERY. 
Check the registered keyless transmitter battery.
  1. Close all the doors and rear gate of the vehicle which keyless system operates normally.
  2. Remove the key from ignition switch.
  3. Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.
Does the vehicle operate lock and unlock normally? The transmitter is OK. Replace the transmitter. Refer to REGISTRATION OF KEYLESS TRANSMITTER WITH SUBARU SELECT MONITOR , REPLACEMENT, Transmitter.