Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
Remove PTO cover. Refer to PTO HOUS-
ING/MAGNETO in ENGINE section.
Install a dial indicator on crankcase casting. Po-
sition the gauge on a tooth and set it to zero (0).
Rotate flywheel and check needle movement.
Themaximumalloweddifferencebetweenteeth
is 0.15 mm (.006 in). Otherwise, straighten the
tooth or replace the encoder wheel.
2
R1503motr177A
1
1. Encoder wheel
2. Dial indicator
Properly reinstall cover.
CAMSHAFT POSITION SENSOR
(CAPS)
1
R1503motr178A
1. CAPS
Voltage Test (harness)
Disconnect the connector from the wiring har-
ness.
To see the connector pin-out, temporarily remove
the connector shield joining the harness, to ex-
pose the terminal numbers.
Remove and reinstall safety lanyard to activate the
system.
Probe terminal 3 of CAPS connector (wiring har-
ness side) and battery ground.
– If 12 V is read, check continuity of circuits A-20
and A-34. If they test good, perform the CAPS
voltage test as explained below. If CAPS tests
good, try a new ECM.
R1503motr183A
20
34
ECM CONNECTOR
– If 12 V is not read, check continuity of circuit
2-19 from MPEM to the CAPS. If it tests good,
try a new MPEM. Otherwise, repair wiring har-
ness.
Remove the CAPS from the cylinder head.
Set up the following electric circuit to perform the
voltage test.
smr2004-Complete Line Up 425
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