Dodge ZB 2005 Service Manual page 1217

DRIVEABILITY - GAS
P0300-MULTIPLE CYLINDER MIS-FIRE —
TEST
15 Remove the Fuel Pump Relay or ASD Relay.
Using a 12-volt test light connected to 12-volts, probe the Ignition Coil Control circuit
in the Ignition Coil harness connector.
Crank the engine for 5 second while observing the test light.
NOTE: The primary resistance of the 8.3L Ignition coil is 0.53 to 0.65 of an
ohm 77°F (25°C).
Does the test light brightly blink/flicker?
Yes → Replace the Ignition Coil.
→ Go To 16
No
16 Turn the ignition off.
Disconnect the PCM harness connectors.
Check the Coil Control circuit for an open, short to ground, and short to voltage.
Was a problem found with the Coil Control circuit?
Yes → Repair the Coil Control circuit.
→ Go To 17
No
17 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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