Chrysler PT Cruiser 2001 Service Manual Supplement page 2603

Symptom:
P0551-POWER STEERING SWITCH FAILURE
When Monitored and Set Condition:
P0551-POWER STEERING SWITCH FAILURE
When Monitored: With the ignition key on and engine running.
Set Condition: With the vehicle above 80 km/h (50 MPH) for over 30 seconds, the power
steering pressure switch remains open.
WIRING HARNESS INTERMITTENT
POWER STEERING PRESSURE SWITCH GROUND CIRCUIT OPEN
POWER STEERING PRESSURE SWITCH
POWER STEERING PRESSURE SWITCH SENSE CIRCUIT SHORTED TO GROUND
POWER STEERING SWITCH SENSE CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRB, read PCM DTCs.
Is the Good Trip Counter for P-0551 displayed and equal to zero?
Yes → Go To 2
→ Go To 7
No
2 Turn the ignition off.
Disconnect the Power Steering Pressure Switch harness connector.
Measure the resistance between ground and the Power Steering Pressure Switch
Ground circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 3
→ Repair the Power Steering Pressure Switch Ground circuit for an
No
POSSIBLE CAUSES
ACTION
open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
143
APPLICABILITY
All
All