Circuit Description
The body control module (BCM) will set DTC B3109 - Keyless Entry Transmitter
Low Battery - when the transmitter battery voltage is below 2.5 volts. Nominal
battery voltage is 3.0 volts.
Conditions for Setting the DTC
| • | 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 multimeter (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 battery with Panasonic CR2032 or an equivalent. |
| • | DTC 3109 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. |
