Eht Sensor; Efi Wire Harness - Briggs & Stratton VANGUARD M490000 Repair Manual

7. Install fuel rail retaining clip into hole in CKP sensor
bracket.
8. See Air Cleaner Assembly/Static Guard/ Decorative
Cover/Blower Housing, Installation.

EHT Sensor

NOTE: The EHT sensor is an integral part of the EFI wire
harness and is not sold separately. Replace EFI wire
harness if EHT sensor is bad.

EFI Wire Harness

Removal
1. See Air Cleaner Assembly/Static Guard/Decorative
Cover/Blower Housing, Removal.
2. Remove flywheel. Proceed as follows:
A. Using an air impact wrench or breaker bar,
5
loosen flywheel nut.
B. Remove four hex flange screws to release fan
from flywheel.
C. Unthread flywheel nut from crankshaft taper and
then thread back on a couple turns.
D. Obtain flywheel puller (Part No. 19621).
E. Using the larger holes in the puller tool, and with
the open side facing upward, place tool over
crankshaft taper seating it on the flywheel nut.
F. Install hex nut on each of two puller screws.
Insert puller screws through holes in puller tool,
and then thread into flywheel an equal number of
turns.
G. Rotate hex nuts until contact is made with the
puller tool. Verify that the puller tool is square.
See Figure 15.
H. Holding screws to prevent rotation, alternately
turn each hex nut in small increments until the
flywheel is free.
I. Remove flywheel from crankshaft.
CAUTION
Keep fingers away from inside edge of flywheel
during removal. Stator magnets are powerful and
may pull the flywheel in with sufficient force to
cause hand injury.
J. Remove screws to release puller tool from
flywheel.
3. Remove four TORX screws to release backplate (and
oil fill tube flange) from cylinder mounting bosses.
4. See A of Figure 16. Proceed as follows:
• Disconnect 6-place (or 8-place) engine to chassis
connector.
118
• Disconnect starter solenoid ring and spade
terminals.
• Remove hex flange screw to release ground wire
ring terminal from cylinder boss.
• Remove two hex flange screws to release starter
motor from cylinder 1.
• Disconnect voltage regulator connector.
• Remove hex flange screw to release fuse/relay
block cover and voltage regulator bottom flange
from cylinder 1 heat shield.
• Disconnect ECM J1 and J2 connectors.
• Disconnect ECM ground wire ring terminal.
5. See B of Figure 16. Proceed as follows:
• Remove TORX screw to release EHT sensor
bracket from cylinder 1.
NOTE: Ignition coil connectors are disconnected
during blower housing removal.
• Disconnect fuel injector connectors.
• Disconnect HO2 sensor connector.
• Disconnect MAP/MAT sensor connector.
• Remove EFI wire harness from retaining clip on
fuel rail (centered at front of intake elbow).
• Cut cable strap to release EFI wire harness from
intake manifold.
6. See C of Figure 16. Proceed as follows:
• Disconnect CKP sensor connector.
• Disconnect fuel pump module connector.
• Disconnect oil pressure switch connector.
Release wire from hose clip on cylinder 2 heat
shield.
7. Remove EFI wire harness from engine.
15