Kohler Command Pro EFI ECH940 Service Manual page 64

Starter System
Solenoid Tests
NOTE: Please perform following testing as near to conditions during failure.
Before Starting
● Disable ignition system: with key off , unplug EFI Electronic Control Unit (ECU) or remove both 10 amp (red) engine
mounted fuses.
● Battery voltage should be tested and must be at 12.4 VDC or higher. Do not proceed if battery voltage is less than
12.4 VDC as battery should be charged.
● Test meter leads before use. (Set meter to Ohms and check for resistance reading of less than 0.5 Ohm.)
● If available, use clamping meter leads to assist with testing.
● Set meter to next highest voltage scale that includes 12 VDC.
● When taking readings, allow meter to stabilize before recording. Reading should stabilize after 3 to 5 seconds. If
reading continues to drop while cranking, stop test and perform a battery load test.
A
D
+ -
+ -
E
Test #1
A Battery Voltage Test
(Static)
E Battery
I Test #1 Results
Test 1 Conclusions
•
If battery voltage is above 12.4 VDC continue to Test 2.
•
If voltage is below 12.4 VDC, charge battery and retest.
•
If battery will not hold a charge it should be replaced before continuing test or replacing starter.
Test 2 Conclusions
•
If battery cranking voltage is above 9.0 VDC continue to Test 3.
•
If battery cranking voltage is below 9.0 VDC you should check battery by using a load tester. Also check for external
engine load.
Test 3 Conclusions
•
If diff erence between test 2 and test 3 is greater than 1 VDC check all positive and negative electrical connections
for corrosion and/or loose fasteners in starter circuit.
64
G
I
Test #2
B Voltage Drop Across
Battery (Cranking)
F Starter
J Test #2 Results
KohlerEngines.com
B
D
+ -
+ -
E
J
Test #3
C Voltage Drop Across
Starter (Cranking)
Touch meter leads
G to actual battery
terminals.
K Test #3 Results
C
D
+ -
H
+
F
-
K
D DVOM
Use starter end plate
H
as test point.
62 690 13 Rev. A