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If resistance value is incorrect, repair the connec-
tors or replace the wiring harness between ECM
connector and the CPS.
CPS Replacement
MAGNETO/STARTER.
Refer to
MANIFOLD ABSOLUTE
PRESSURE SENSOR (MAPS)
The sensor continuously measures the manifold
absolute pressure.
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MAPS Inspection
Remove seat. Refer to
Ensure MAPS sensor vacuum tube is properly
connected, not leaking, not kinked or damaged.
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Tube length is calibrated and should not be tem-
pered with. Otherwise, improper engine calibra-
tion could occur.
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Subsection 01 (ELECTRONIC FUEL INJECTION (EFI))
BODY.
Section 05 FUEL SYSTEM
MAPS Test with B.U.D.S.
Start engine.
Using B.U.D.S. software, read the manifold abso-
lute pressure.
Click on Monitoring tab, then on ECM tab.
Needle should move as you throttle the engine.
Otherwise, perform the voltage and continuity
tests.
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MAPS Input Voltage Test
Check voltage output from ECM to manifold abso-
lute pressure sensor (MAPS).
Disconnect connector from MAPS.
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Turn ignition key ON and set engine stop switch
to RUN.
Use the Fluke 115 multimeter (P/N 529 035 868)
and select Vdc.
Probe connector terminals as per the following ta-
ble.
TEST PROBES
Pin 1
Battery ground
MEASUREMENT
5 Vdc
203
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Troubleshooting
