Section 07 ENGINE MANAGEMENT (DI)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
1
F12R0TA
2
4
3
1. RAVE solenoid
2. Supply hose from air compressor
3. Check valve
4. Outlet hose to RAVE valves
Install leak test pump on hose end and apply pres-
sure. If pressure can not be held, check hoses for
leaks. If hoses test good, connect pump directly
to each RAVE valve nipple and pressurize. If pres-
sure drops, replace the defective seal inside RAVE
valve.
Take into account that the RAVE may be mechan-
ically stuck in the cylinder slot. Open the RAVE
valve and check for free operation. Refer to EN-
GINE section and look in TOP END subsection.
Pressure Relief Circuit
When RAVE valve is released, the pressure es-
cape from this vented hose. If the RAVE valves do
not return when the solenoid is released, ensure
the return spring is in good condition, this hose is
not kinked or plugged and that the solenoid allows
pressure to bleed there.
Although it is not related with RAVE valve opera-
tion, we suggest to verify the check valve opera-
tion which prevents the pressure from going down
into the crankcase. Install a hose pincher after the
T-fitting to adequately pressurize the check valve
portion.
F12R0TB
1
32
1. RAVE solenoid
2. Pressure relief hose
3. Install hose pincher here
Resistance Test
Reconnect the solenoid and disconnect the AMP
connector number 4 on the MPEM.
Using a multimeter, check resistance value be-
tween terminals 20 and 23.
The resistance should be 24
.
If resistance value is correct, try a new MPEM.
Refer to MPEM REPLACEMENT procedures else-
whereinthissection.
If resistance value is incorrect, repair the wiring
harness/connectors between AMP connector and
solenoid.
IGNITION COIL
NOTE: The MPEM energizes the primary side of
each ignition coil individually. It can detect open
and short circuit in the primary winding but it does
not check the secondary winding.
Using the vehicle communication kit (VCK) with
the B.U.D.S. software, energize the ignition coil
from the Activation tab.
You should hear the spark occurring. In doubt, use
an inductive spark tester or a sealed tester — avail-
able from after-market tool/equipment suppliers
— to prevent spark occurring in the bilge. Other-
wise, perform the following checks.
366 smr2004-Complete Line Up
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