Chrysler Concorde 2004 Service Manual page 890

DRIVEABILITY - NGC
P0579-SPEED CONTROL SWITCH #1 PERFORMANCE —
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 resistance between the (V37) S/C Switch Signal circuit and the (K4)
Sensor ground circuit in the Speed Control harness connector.
Is the resistance below 5.0 ohms?
Yes → Repair the (V37) S/C Switch Signal circuit shorted to the (K4)
→ Go To 4
No
4 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 (V37) Speed Control Switch Signal circuit at the Speed
Control harness connector.
Is the is the voltage above 5.0 volts?
Yes → Repair the (V37) S/C Switch Signal circuit shorted to the battery
→ Go To 5
No
5 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 resistance between ground and the (V37) S/C Switch Signal circuit at
the Speed Control harness connector.
Is the resistance below 100 ohms?
Yes → Repair the (V37) Speed Control Switch Signal circuit shorted to
→ Go To 6
No
6 NOTE: The measurement must be taken from both Speed Control Switch
harness connectors.
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 (V37) S/C Switch 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 measurements?
Yes → Go To 7
→ Repair the (V37) Speed Control Switch Signal circuit for an open.
No
ACTION
Sensor Ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
the ground.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 4 - NGC.
232
Continued
APPLICABILITY
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