DTC P0550 [L3]

BME010200500W06

DTC P0550

PSP switch circuit malfunction

DETECTION CONDITION

• PCM monitors PSP switch signal at PCM terminal 1Z. If input voltage is low (switch stays on) for 1 minute when VSS is above 60.1 km/h {37.3 mph} and ECT is above 60 °C {140 °F}, PCM determines that PSP switch circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.

POSSIBLE CAUSE

• PSP switch malfunction
• Connector or terminal malfunction
• Short to ground in wiring between PSP switch terminal and PCM terminal 1Z
• Open circuit in wiring between PSP switch terminal and PCM terminal 1Z
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT POOR CONNECTION OF PSP CONNECTOR
• Turn ignition key to OFF.
• Disconnect PSP connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
4
INSPECT PSP SWITCH
• Perform PSP switch inspection.
• Is PSP switch okay?
Yes
Go to next step.
No
Replace PSP switch, then go to Step 8.
5
INSPECT PSP SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
• Disconnect PCM connector.
• Inspect continuity between PSP switch terminal A and body ground.
• Is there continuity?
Yes
Repair or replace harness for short to ground, then go to Step 8.
No
Go to next step.
6
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn ignition key to OFF
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to next step.
7
INSPECT SIGNAL CIRCUIT MALFUNCTION FOR OPEN CIRCUIT
• Inspect continuity between PSP terminal A and PCM terminal 1Z.
• Is there continuity?
Yes
Repair or replace harness, then go to next step.
No
Go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P0550 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Start engine.
• Clear DTC from PCM memory using WDS or equivalent.
• Drive vehicle above 60.1 km/h {37.3 mph} for 1 min.
• Verify that ECT PID above 60 °C {140 °F} using WDS or equivalent.
• Is PENDING CODE of same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.