Chrysler 300M 2002 Service Manual page 2751

STARTING
*START AND STALL CONDITION —
TEST
6 Note: The fuel pressure must be within specification before continuing.
Turn the ignition off.
WARNING: The fuel system is under a constant pressure even with the
engine off. Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Disconnect the fuel supply line at the fuel rail.
Connect fuel line adapter #6539(5/16 ) or #6631(3/8 ) to the disconnected fuel supply
line. Insert the other end of the adapter into a graduated container.
Caution: Do not operate the fuel pump for more than 7 seconds in the next
step. Fuel pump module reservoir may run empty and damage to the fuel
pump will result.
Note: Specification: A good fuel pump will deliver at least 1/4 liter (1/2 pint)
of fuel in 7 seconds.
Turn the ignition on.
With the DRBIII , actuate the ASD Fuel System test for 7 seconds.
Is the fuel pump capacity within specification?
Yes → Go To 7
→ Check for a kinked/damaged fuel supply line between the fuel
No
Caution: Stop All Actuations.
7 Turn the ignition on.
With the DRBIII , read TPS VOLTS.
While monitoring the DRBIII , slowly open and close the Throttle.
Is the voltage change smooth?
Yes → Go To 8
→ Replace the Throttle Position Sensor.
No
8 Turn the ignition on.
With the DRBIII , read Throttle Position voltage. Throttle must be against stop.
Is the voltage 0.92 or less with the Throttle closed?
Yes → Go To 9
→ Check for a binding throttle condition. If OK, replace the Throttle
No
ACTION
tank and fuel rail. If OK, replace the fuel pump module.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Continued
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APPLICABILITY
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