Chrysler 300M 2002 Service Manual page 2673

DRIVEABILITY - NGC
P0594-SPEED CONTROL SERVO POWER CIRCUIT —
TEST
5 Turn the ignition off.
Disconnect the Speed Control Servo harness connector.
Disconnect the Brake Switch harness connector.
Measure the resistance between ground and the Speed Control Brake Switch Output
circuit at the Speed Control Servo harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the S/C Brake Switch Output
No
6 Turn the ignition off.
Disconnect the S/C Servo harness connector.
Disconnect the Brake Switch harness connector.
Measure the resistance of the S/C Brake Switch Output circuit from the Brake
Switch harness connector to the S/C Servo harness connector.
Is the resistance below 5.0 ohms?
Yes → Repair the open/high resistance in the S/C Brake Switch Output
No
7 Disconnect the Brake Lamp Switch harness connector.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, probe the Speed Control Power Supply
circuit in the Brake Lamp Switch harness connector.
NOTE: It is necessary to HOLD the Cruise Control Switch in the ON position
to get and accurate reading.
Does the test light illuminate brightly?
Yes → Replace the Brake Lamp Switch.
No
8 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
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
→ Go To 6
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
→ Go To 7
Perform POWERTRAIN VERIFICATION TEST VER - 4.
→ Go To 8
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
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Continued
APPLICABILITY
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