Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 458
•
When Monitored:
With the ignition on or off and with the FCM awake.
•
Set Condition:
The Front Control Module will set this DTC within 2 seconds if the ignition unlock run/start circuit voltage is not
what the expected value should be.
Possible Causes
(F902) IGNITION UNLOCK RUN START CIRCUIT OPEN
(F902) IGNITION UNLOCK RUN START CIRCUIT SHORTED TO VOLTAGE
SHIFTER LEVER ASSEMBLY
FRONT CONTROL MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds then turn the ignition
off.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
2.
(F902) IGNITION UNLOCK RUN START CIRCUIT SHORTED TO VOLTAGE
Disconnect the Shifter Lever Assembly harness connector.
Cycle the ignition switch from off to on then back to off.
NOTE: The ignition switch must be in the off position when per-
forming the following step.
Using a 12–volt test light connected to ground, check the (F902) Igni-
tion Unlock Run Start circuit.
Does the test light illuminate brightly?
Yes
>> Repair the (F902) Ignition Unlock Run Start circuit for a
short to voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Go To 3
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IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
LX
3.
SHIFTER LEVER ASSEMBLY
Turn the ignition on.
With the test light still connected from the previous step, check the
(F902) Ignition Unlock Run Start circuit.
Does the test light illuminate brightly?
Yes
>> Replace the Shifter Lever Assembly in accordance with the
service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Go To 4
4.
(F902) IGNITION UNLOCK RUN START CIRCUIT OPEN
Turn the ignition off.
Remove the FCM from the IPM.
Measure the resistance of the (F902) Ignition Unlock Run Start circuit
between the Shifter Lever Assembly and the FCM-PDM connector.
Is the resistance below 5.0 ohms?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace and program the Front Control Mod-
ule in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Repair the (F902) Ignition Unlock Run Start circuit for an
open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
LX
IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
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B211E–IGNITION RUN/ACC/PAD CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
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IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
With the ignition on.
•
Set Condition:
The Front Control Module will set this DTC within 500ms if the (P307) Accessory Delay Relay Control circuit is
open or shorted to ground.
Possible Causes
(P307) ACCESSORY DELAY RELAY CONTROL CIRCUIT OPEN
(P307) ACCESSORY DELAY RELAY CONTROL CIRCUIT SHORTED TO GROUND
ACCESSORY DELAY RELAY
FRONT CONTROL MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
2.
ACCESSORY DELAY RELAY
Turn the ignition off.
Install a substitute relay in place of the original Accessory Delay Relay.
Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds.
With the scan tool, read the active FCM DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 3
No
>> Replace the original Accessory Delay Relay.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
LX
IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
8I - 13
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