For 1990-2009 cars

The body control module (BCM) will set DTC B3109 when the transmitter battery voltage is below 2.5 volts. Nominal battery voltage is 3 volts.

### DTC Parameters

• | The transmitter battery voltage is less than 2.5 volts.

• | The transmitter low battery bit is set.

### Diagnostic Aids

• | It is not recommended to test the transmitter battery with a digital volt-ohm meter (DVOM) or digital multi-meter (DMM). These meters do not give an accurate indication of battery condition as they do not test the battery under load.

• | When in doubt, replace the battery with a Panasonic CR2032 or equivalent.

• | DTC B3109 will set as a current code when a transmitter with a low battery condition has been activated in the current ignition cycle. The current code status will become a history code if a transmitter with a good battery is activated in the same ignition cycle.