Section 06 ENGINE MANAGEMENT (SDI)
Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
– Check piston condition. Remove exhaust sys-
tem and reed valves on intake side. Verify pis-
ton condition through the intake and exhaust
ports. Look for scoring on piston skirts. Scored
piston skirts may result in RER working errati-
cally making you think the problem is an elec-
tronic problem.
When it does not work at all, check wiring and
START/RER switch as explained above. If every-
thing is normal, try another ECM.
DESS POST 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 DESS post wires.
Tether Cord Cap Removed
Connect test probes to post 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 post 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
must be close to 0 ohm.
mmr2005-081 277
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