Chrysler 300M 2002 Service Manual page 2696

Symptom:
P0703-BRAKE SWITCH #2 CIRCUIT
When Monitored and Set Condition:
P0703-BRAKE SWITCH #2 CIRCUIT
When Monitored: TEST #1: Vehicle speed greater than 20 MPH to enable. TEST #2:
Speed must be 0 and brake switch indicates on.
Set Condition: TEST #1: If vehicle speed goes to 0 MPH without brake input. Condition
must be repeated 15 times to set fault. Two trip fault. TEST #2: If vehicle speed go above
20 MHP for more than 6.0 seconds without a change in brake state. Condition must be
repeat 15 times to set fault. Two Trip Fault.
INTERMITTENT CONDITION
FUSED B+ CIRCUIT
BRAKE SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE
BRAKE SWITCH SENSE SHORTED TO GROUND
BRAKE SWITCH SENSE CIRCUIT OPEN
GROUND CIRCUIT OPEN
BRAKE LAMP SWITCH OPERATION
PCM
TEST
1 NOTE: Ensure the Brake Switch is adjusted properly before continuing.
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Go To 9
No
2 Turn the ignition off.
Disconnect the Brake Lamp Switch harness connector.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the
Brake Lamp Switch harness connector.
Does the test light illuminate brightly?
Yes → Go To 3
→ Repair the Fuse B+ circuit. Inspect the related fuse and repair as
No
POSSIBLE CAUSES
ACTION
necesary.
Perform POWERTRAIN VERIFICATION TEST VER - 4.
DRIVEABILITY - NGC
267
APPLICABILITY
All
All