Chrysler PT Cruiser 2001 Service Manual Supplement page 2604

DRIVEABILITY - GAS
P0551-POWER STEERING SWITCH FAILURE —
TEST
3 Turn the ignition off.
Disconnect the Power Steering Pressure Switch harness connector.
Turn the ignition on.
Connect a jumper wire to the Power Steering Pressure Switch Sense circuit.
While monitoring the Power Steering Switch on the DRB, touch the jumper wire to
the Power Steering Pressure Switch Ground circuit in the Power Steering Pressure
Switch harness connector several times.
Did the Power Steering Switch status change from HI to LOW?
Yes → Replace the Power Steering Pressure Switch.
No
4 Turn the ignition off.
Disconnect the Power Steering Pressure Switch harness connector.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the Power Steering Pressure Switch
Sense circuit.
Is the resistance above 100k ohms?
Yes → Go To 5
No
5 Turn the ignition off.
Disconnect the Power Steering Pressure Switch harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the Power Steering Pressure Switch Sense circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 6
No
6 If there are no possible causes remaining, view repair.
Repair
7 Turn the ignition off.
NOTE: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
NOTE: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?
Yes → Repair wiring harness/connectors as necessary.
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Go To 4
→ Repair the Power Steering Pressure Switch Sense circuit for a
short to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Repair the Power Steering Pressure Switch Sense circuit for an
open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
→ Test Complete.
Continued
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APPLICABILITY
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