Additional Tests
BATTERY/ALTERNATOR TEST
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BATTERY/ALTERNATOR TEST
The Scan Tool can perform a check of the vehicle’s battery and
alternator system to ensure the system is operating within acceptable
limits. You can perform a battery check only, or an alternator system
(battery and alternator) check.
To perform a battery check ONLY:
1.
Press
M
and release.
The Main Menu displays.
2.
Select
Battery/Alternator Test
, then
press
ENTER
.
The Battery/Alternator Monitor Test
displays.
3.
Select
Battery Test
, then press
ENTER
.
An “instructional” message displays, showing the procedures to
prepare the vehicle for the battery check.
4.
Prepare the vehicle for the battery check:
Turn the engine off.
Place the transmission in PARK or NEUTRAL, and set the
parking brake.
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.
For “unsealed” batteries, make sure the water level in each cell
is above the battery plates.
Turn the ignition on.
DO NOT
start the engine.
5.
Press
ENTER
to begin the battery check.
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.
An “instructional” message shows.
6.
Turn the vehicle’s headlights on, the press
ENTER
to continue.
A “countdown” message shows while the battery check is in
process.
If battery voltage is
less than
12.1 volts, an advisory message
shows. Press
M
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.
If battery voltage is
greater than
12.1 volts, an “instructional”
message shows.
7.
Turn the vehicle’s headlights off, then press
ENTER
to continue.