DTC P0550 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200500205

DTC P0550

PSP switch circuit malfunction

DETECTION CONDITION

• The PCM monitors PSP switch signal at PCM terminal 31. If input voltage is low voltage (switch stays on) for 1 min. when the VSS is above 60.1 km/h {37.3 mph} and ECT is above 60 °C {140 °F}, the 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 condition in two consecutive drive cycles.
• 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
• Short to ground between PSP switch terminal and PCM terminal 31
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the 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 the next step.
No
Go to the next step.
3
INSPECT PSP SWITCH
• Perform PSP switch inspection.
• Is the PSP switch normal?
Yes
Go to the next step.
No
Replace the PSP switch, then go to Step 5.
4
INSPECT PSP SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
• Disconnect PCM connector.
• Inspect for continuity between PSP switch terminal (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness for short to ground, then go to the next step.
No
Go to the next step.
5
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 the vehicle above 60.1 km/h {37.3 mph} for 1 min.
• Verify that ECT PID above 60 °C {140 °F} using the WDS or equivalent.
• Is the PENDING CODE of same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.