Chrysler 300M 2002 Service Manual page 2661

DRIVEABILITY - NGC
P0579-SPEED CONTROL SWITCH #1 PERFORMANCE —
TEST
7 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 Speed Control Signal 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 → Go To 8
→ Repair the Speed Control Switch Signal circuit for an open.
No
8 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 → Go To 9
→ Repair the Sensor Ground circuit for an open.
No
9 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 4.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
232
Continued
APPLICABILITY
All
All
All