Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1808
3.
STEERING CONTROL MODULE (SCM)
View repair.
Repair
Replace the Steering Control Module (SCM) in accordance with the Service Information.
4.
INTERMITTENT STEERING WHEEL CONTROL [+] SWITCH CIRCUIT DTC
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes
>> Repair as necessary.
No
>> Test complete.
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COLUMN ELECTRICAL DIAGNOSIS
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B148F-STEERING WHEEL CONTROL [-] SWITCH CIRCUIT
For a complete wiring diagram Refer to Section 8W.
LX
COLUMN ELECTRICAL DIAGNOSIS
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Theory of Operation
The Steering Wheel Control Minus (-) Switch is part of the Right Steering Switch. The switching status is transferred
to the Steering Control Module (SCM) by way of the LIN bus, a serial sub-bus. The SCM converts the data to
CAN(B) and sends the message to the corresponding module on the bus.
•
When Monitored:
Continuously with the ignition on.
•
Set Condition:
The Steering Control Module senses that the Steering Wheel Control Minus (-) Switch is in the Set position for
greater than 50 seconds.
Possible Causes
INTERMITTENT STEERING WHEEL CONTROL [-] SWITCH CIRCUIT DTC
RIGHT STEERING SWITCH
STEERING CONTROL MODULE (SCM)
Diagnostic Test
1.
DTC IS ACTIVE
NOTE: If U1109–LOST COMMUNICATION WITH LIN STEERING WHEEL CONTROLS is set along with this
DTC, diagnose the communication DTC first.
NOTE: If P0562–BATTERY VOLTAGE LOW or P0563–BATTERY VOLTAGE HIGH is set along with this DTC,
diagnose the battery voltage DTC first.
Ignition on, engine not running.
With the Scan Tool, select View DTCs in the Steering Control Module.
Is the DTC status Active at this time?
Yes
>> Go to 2
No
>> Go to 4
2.
RIGHT STEERING SWITCH
Turn the ignition off.
Replace the Right Steering Switch in accordance with the Service Information.
Turn the ignition on.
Press and release the Minus (-) Switch several times.
With the Scan Tool, Clear Stored DTCs in the Steering Control Module.
With the Scan Tool, select Data Display and view the Minus (-) switch data.
While monitoring the Minus (-) switch data, press and release the Minus (-) Switch several times.
Does the Minus (-) switch data change from Set to Not Set when the switch is pressed and released?
Yes
>> Test complete.
No
>> Go to 3
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COLUMN ELECTRICAL DIAGNOSIS
LX
3.
STEERING CONTROL MODULE (SCM)
View repair.
Repair
Replace the Steering Control Module (SCM) in accordance with the Service Information.
4.
INTERMITTENT STEERING WHEEL CONTROL [-] SWITCH CIRCUIT DTC
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes
>> Repair as necessary.
No
>> Test complete.
LX
COLUMN ELECTRICAL DIAGNOSIS
19 - 53
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