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 DTC P0550 [L8, LF, L3]

DTC P0550 [L8, LF, L3]

id0102a1808800

DTC P0550

PSP switch circuit malfunction

DETECTION CONDITION

• The PCM monitors PSP switch signal. If input voltage is low voltage (switch stays on) for 1 min. when the VSS is above 60 km/h {37 mph} and ECT is above 60 °C {140 °F}, the PCM determines that PSP switch circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in 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 harness between PSP switch terminal A and PCM terminal 2T
• Open circuit in wiring harness between PSP switch terminal A and PCM terminal 2T
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service information.
If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT PSP CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect PSP connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
4
INSPECT PSP SWITCH
• Perform PSP switch inspection.
• Is PSP switch normal?
Yes
Go to the 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 for continuity between PSP switch terminal A (harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace harness for short to ground, then go to Step 8.
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to the next step.
7
INSPECT SIGNAL CIRCUIT MALFUNCTION FOR OPEN CIRCUIT
• inspect for continuity between PSP terminal A (harness-side) and PCM terminal 2T (harness-side).
• Is there continuity?
Yes
Repair or replace harness, then go to the next step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0550 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Start the engine.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Drive vehicle above 60 km/h {37 mph} for 1 min.
• Verify that ECT PID above 60 °C {140 °F} using the WDS or equivalent.
• Is PENDING CODE for this DTC present?
Yes
Replace PCM, then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Is any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.