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

7. Tighten ECM/fuse block bracket to throttle body
screw to 78-96 lb-in (9-11 Nm).
8. Slide Phillips screw through ECM flange (Grey ECM
J1 connector side) and ground wire ring terminal.
Start screw into ECM/fuse block bracket.
9. Install second Phillips screw on opposite side, and
alternately tighten screws to 35-52 lb-in (4-6 Nm).
10. Install access cover. See Access Cover/Blower
Housing, Installation, steps 7-10.

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.
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5

EFI Wire Harness

Removal
1. See Access Cover/Blower Housing, Removal.
2. See Air Cleaner Assembly, Removal.
3. See A of Figure 29. On cylinder 2 side of engine,
proceed as follows:
• Remove screw to release fuse block cover from
ECM/fuse block bracket.
• Disconnect MAP/MAT sensor connector.
• Disconnect fuel injector connector.
• Disconnect ignition coil connector.
• Remove Phillips screw to release ground wire
ring terminal from cylinder boss.
• Disconnect ECM J2 connector.
4. See B of Figure 29. On cylinder 1 side of engine,
proceed as follows:
• Disconnect ECM J1 connector.
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• Remove Phillips screw to release ECM ground
wire ring terminal from ECM/fuse block bracket.
• Disconnect fuel injector connector.
• Disconnect ignition coil connector.
• Disconnect CKP sensor connector.
• Disconnect IAC connector.
5. See C of Figure 29. Proceed as follows:
• Disconnect TPS connector.
• Disconnect fuel pump module connector.
• Remove TORX screw to release EHT sensor
bracket from cylinder 1.
• Disconnect 2- and 6-place (or single 8-place)
engine to chassis connectors.
• Disconnect starter solenoid ring and spade
terminals.
6. Remove two Phillips screws to remove air block
mounting plate.
7. See C of Figure 29. Feed wire harness conduit and
connectors up through air block mounting plate
opening.
8. Cut two cable straps around intake manifold between
air block mounting plate and inside ignition coil
mounting bosses. Remove EFI wire harness from
engine.
Installation
1. Position new EFI wire harness at top of intake
manifold separating conduit and connectors into three
groups as shown in Figure 29.
2. See C of Figure 29. Feed wire harness connectors
and conduit down through air block mounting plate
opening to area below intake manifold.
3. See B of Figure 29. On cylinder 1 side of engine,
proceed as follows:
• Connect ECM J1 connector.
• Slide Phillips screw through ECM flange (Grey
ECM J1 connector side) and ground wire ring
terminal. Start screw into ECM/fuse block bracket
and tighten to 35-52 lb-in (4-6 Nm).
• Connect fuel injector connector. Push in green
secondary lock to secure.
• Install new cable strap through ignition coil
wire harness socket connector, install over
inside ignition coil mounting boss, and connect
connector.
• Connect CKP sensor connector.
• Connect IAC connector.
4. See A of Figure 29. On cylinder 2 side of engine,
proceed as follows:
• Install screw to fasten fuse block cover to ECM/
fuse block bracket. Tighten screw to 78-96 lb-in
(9-11 Nm).