Chrysler 300M 2002 Service Manual page 2666

P0581-SPEED CONTROL SWITCH #1 HIGH —
TEST
3 Turn the ignition off.
Disconnect the Speed Control On/Off Switch harness connector.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Disconnect the PCM harness connector.
Measure the voltage of the Speed Control Switch Signal circuit at the Speed Control
harness connector.
Is the is the voltage above 5.0 volts?
Yes → Repair the Speed Control Switch Signal circuit shorted to the
→ Go To 4
No
4 NOTE: The measurement must be taken from both Speed Control Switch
harness connector.
Turn the ignition off.
Disconnect the Speed Control On/Off Switch harness connector.
Disconnect the Speed Control Resume/Accel Switch harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Sensor Ground circuit from the Speed Control harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms for both measurement?
Yes → NOTE: Before continuing, check the PCM harness connector
→ Repair the Sensor Ground circuit for an open.
No
5 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
ACTION
battery voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
terminals for corrosion, damage or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
DRIVEABILITY - NGC
Continued
237
APPLICABILITY
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All
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