Dodge Ram 2004, Service Manual

Page: 96 / 642

Symptom:
LOSS OF IGNITION RUN - START
When Monitored and Set Condition:
LOSS OF IGNITION RUN - START
When Monitored: With the ignition in the Run-Start position the ACM monitors the
Fused Ignition Switch Output Run-Start circuit for proper system voltage.
Set Condition: If the voltage on the Fused Ignition Switch Output Run-Start circuit drops
below approximately 4.5 volts, the code will set.
POSSIBLE CAUSES
FUSED IGNITION SW OUTPUT RUN-START SHORT TO GROUND
IGNITION SWITCH RUN - START CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT RUN-START CIRCUIT OPEN
ACM, FUSED IGNITION OUTPUT RUN-START CIRCUIT OPEN
ACM, RUN - START SHORTED TO GROUND
ON - OFF SWITCH, RUN - START CIRCUIT SHORTED TO GROUND
FUSED IGNITION SWITCH OUTPUT RUN - START CIRCUIT SHORT TO GROUND
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST ACTION APPLICABILITY
1 Ensure the battery is fully charged.
Turn the ignition on.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
DETERMINE ACTIVE OR STORED DTC: All
ACM - ACTIVE DTC
Go To 2
ACM - STORED DTC
Go To 10
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2 Turn Ignition off.
Remove and inspect the Airbag Run-Start Fuse.
NOTE: Check connectors - Clean and repair as necessary.
Is the Fuse open? All
Yes
→
Go To 3
No
→
Go To 7
82
AIRBAG