GxT Ferret 63 DIAGNOSTIC ENGINE ANALYZER - Manual (Page 22)

“CRANKING ANALYSIS” KEY
CRANKING HISTORY
An electrical power system test of the
engine is the primary feature of this se-
quenced procedure. Performance mea-
surements of the alternator, battery, and
starter allow comparison to ratings.
This test records battery voltage and amps while the
starter cranks the engine for 15 seconds, then there
is a wait to check battery recovery time, followed by a
measurement of the charging current when the engine
is started.
The Cranking Analysis test procedure for a standard
engine follows the basic test procedure in the left-hand
column below. Test variations are described in the right-
hand column for nonstandard vehicles and conditions.
SENSOR
TEST
02 TPS
SETUP AMP ZERO SELECT MESSAGE
PRINT
DISPLAY
PRINT
AUTOTEST
CHARGING
STARTING
AMPS VOLTS
IGNITION
PRIMARY
COIL MODULE
DWELL VARIATION
AUXILIARY AUXILIARY PER CYLINDER
CRANKING
ANALYSIS
COMPRESSION
BAT. STARTER ALT.
POWER
BALANCE
% RPM DROP
AUTO MANUAL
PER CYLINDER
SPARK
BURN
SECONDARY
MSEC SLOPE
PER CYLINDER
HARD
START
IGNITION VOLTS
AUXILIARY
FUEL
INJECTION
MSEC, % DUTY, HZ
AUXILIARY
START
PAPER
ADVANCE
STEP ONE
BASIC TEST
You should have completed the analyzer SETUP steps,
including the check for good readings with HARD
START.
Press CRANKING ANALYSIS” to begin.
Press START.
Using SELECT, there is a choice of the complete
“Cranking History” test or doing the “Electronic Compres-
sion” test.
SELECT “Cranking History”, press START.
Keep the car doors closed during the test to reduce bat-
tery drain.
Press START.
TEST VARIATIONS
If the test has been done before, it will show:
Running a new test will erase the old data when the new
data recording begins.
The test will stop if the battery is below 12.30V indicating
a discharged, weak, or loaded battery.
CRANKING ANALYSIS
Engine Warm, Brakes Set.
SELECT: run NEW TEST
START : view OLD DATA
DISCHARGE
15 SECONDS
RECOVERY
TIME
CHARGING
MEASUREMENT
CRANKING
VOLTS
CHARGING
AMPS
14V
12V
10V
OPERATOR
ACTIVITY
CHARGE
DISCHARGE
VOLTS
WAIT
FOR
BATTERY
RUN
ENGINE
CRANK
ENGINE
CRANKING AMPS
CRANKING HISTORY TEST
-20-
Switch ACCESSORIES OFF!
Close Doors, then START
WARNING
THE ENGINE MAY START DURING THE TEST.
SELECT: Compression
TEST then START
Bat 12.04
Recharge BATTERY