BATTERY/ALTERNATOR MONITOR
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n The Battery/Alternator Monitor Menu
displays.
3. Select Battery Monitor, then press
ENTER .
n An “instructional” message displays,
showing the procedures to prepare
the vehicle for the battery check.
4. Prepare the vehicle for the battery
check:
n Turn the engine off.
n Place the transmission in PARK or NEUTRAL, and set the parking
brake.
n Make a visual check of the battery’s condition. If the battery
terminals are corroded or other damage is present, clean or
replace the battery as appropriate.
n For “unsealed” batteries, make sure the water level in each cell is
above the battery plates.
n Turn the ignition on. DO NOT start the engine.
5. Choose Continue to proceed.
If the engine is running, an advisory message shows. Turn
the engine off, then turn the ignition on. DO NOT start the
engine. Press ENTER
to continue.
n An “instructional” message displays.
6. Turn the vehicle’s headlights on, then choose Continue to proceed.
n A “countdown” message shows while the battery check is in
process.
n If battery voltage is less than 12.1 volts, an advisory message
shows. Choose Main Menu to return to the Main Menu. Turn the
ignition off and disconnect the Scan Tool from the vehicle. Fully
charge the battery, then repeat the battery check.
n If battery voltage is greater than 12.1 volts, an “instructional”
message shows.
7. Turn the vehicle’s headlights off, then choose Continue to proceed.
n An “instructional” message shows.
8. Start the vehicle’s engine. Allow the engine to run for several seconds,
then turn the engine off. Repeat for a total of three “start/stop” cycles.
If the Scan Tool did not detect “cranking status” for the
vehicle’s engine, an advisory message shows. Choose
Retest to repeat the battery check, or, choose Exit to return
to the Main Menu.
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