Chrysler 300M 2002 Service Manual page 2659

DRIVEABILITY - NGC
Symptom:
P0579-SPEED CONTROL SWITCH #1 PERFORMANCE
INTERMITTENT CONDITION
SPEED CONTROL SWITCHES
SPEED CONTROL SWITCH SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
SPEED CONTROL SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
SPEED CONTROL SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
SPEED CONTROL SWITCH SIGNAL CIRCUIT OPEN
SENSOR GROUND OPEN
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , monitor each which function for the Speed Control Switches.
Press and release each Speed Control Button.
- Resume/Accel
- Cancel
- Decel (Coast)
- On/Off
- Set
Does each switch function change status when pressing and then depressing each
switch?
Yes → Go To 2
→ Go To 3
No
2 NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
With the engine running at normal operating temperature, monitor the DRBIII
parameters related to the DTC while wiggling the wire harness. Look for parameter
values to change and/or a DTC to set.
Review the DRBIII Freeze Frame information. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
Yes → Repair as necessary
→ Test Complete.
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 4.
230
APPLICABILITY
All
All