Section 05 2–TEC ENGINE MANAGEMENT
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
ENGINE START/RER BUTTON
VERIFICATION
A quick operation test can be done using the ve-
hicle communication kit (VCK) with the B.U.D.S.
software, using the Monitoring section. Press
the START/RER button and look at the START/RER
button LED. It should turn on, indicating the start-
ing system is working on the input side of the
starting system (START/RER button, ECM and
wiring). You know now the problem is on the
output side of the starting system (ECM output
signal to starting solenoid, wiring harness going to
the solenoid and starter motor. Refer to START-
ING SYSTEM for testing procedures). Otherwise,
check the input side as follows.
Disconnect the two connectors of the steering
harness.
Measure the resistance of the two wires on the
small connector ( BEIGE and BLACK) for 0
.De-
press start button and the reading should change
from 0
to infinitely high.
Release the start button and measure the resis-
tance between pin 2 (BEIGE wire) of the small
connector and pin 6 (RED/BROWN wire) on the
big connector for infinitely high resistance to 0
while the start button is depressed.
WARNING
Always respect the wire position when con-
necting the switch. Refer to the wiring dia-
gram.
Test continuity of circuit DB-19. If it is good, try a
new ECM. Otherwise, repair harness/connectors.
DESS SWITCH VERIFICATION
If 2 short beeps are not heard when starting the
engine, refer to DIAGNOSTIC PROCEDURES.
The following continuity tests can also be per-
formed using an ohmmeter.
Disconnect switch wires.
Tether Cord Cap Removed
Connect test probes to switch BLACK/GREEN and
BLACK/WHITE wires. Measure resistance, there
should be NO continuity (open circuit).
Connect one test probe to the WHITE/GREY wire
and the other test probe to the switch top termi-
nal. Measure resistance, it must be close to 0
ohm.
Connect one test probe to the BLACK/GREEN
wire and the other test probe to the switch ring.
Measure resistance, it must be close to 0 ohm.
Tether Cord Cap on DESS Post
Connect test probes to switch BLACK/GREEN
and BLACK/WHITE wires. Measure resistance, it
mustbecloseto0ohm.
SPARK PLUGS
Disassembly
Disconnect the spark plug cable from the spark
plug.
First unscrew the spark plug one turn.
Clean the spark plug and cylinder head with pres-
surize air then completely unscrew.
Spark Plug Installation
Prior to installation make sure that contact sur-
faces of the cylinder head and spark plug are free
of grime.
1) Using a wire feeler gauge, set electrode gap
according to the following chart.
2) Apply anti-seize lubricant over the spark plug
threads to prevent possible seizure.
3) Hand screw spark plug into cylinder head.
Then, tighten the spark plug clockwise an
additional 1/4 turn with a proper socket.
200 mmr2004-Rev
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