RETRIEVING DTC(S)
Note. Subaru Select Monitor (SSM) or an OBD-II scan tool must be used to perform self-diagnostic tests. Follow scan tool manufacturer's instructions for proper operation. SSM can be plugged into either the OBD-II DLC or the dedicated SSM test connectors behind the dash.
Connect scan tool to DLC located on lower left side of dash. (Scheme 1)or (Scheme 2). Retrieve Diagnostic Trouble Codes (DTCs) and freeze frame data, following scan tool manufacturer's instructions. Scan tool functions consist of
- MODE 01 - Current powertrain diagnostic data
- MODE 02 - Powertrain freeze frame data
- MODE 03 - Emission-related powertrain DTCs
- MODE 04 - Clear/reset emission-related diagnostic information
- MODE 05 - Oxygen sensor monitoring test results
Scheme 1
Scheme 2
CLEARING DTC(S)
Clear DTC(s) using scan tool (MODE 04). Refer to scan tool manufacturer's instruction. Disconnecting battery negative battery terminal will also clear DTC(s), but radio presets will be erased.
TROUBLE CODE DEFINITION
| DTC | SSM Title (1) | Circuit Affected | Probable Cause |
|---|---|---|---|
| P0100 | QA | Airflow Sensor Circuit | Open/Short Circuit |
| P0101 | QA-R | Airflow Sensor Circuit Range/Performance Problem | Bad Sensor |
| P0105 | P-S | Pressure Sensor Circuit Malfunction | Open/Short Circuit |
| P0106 | P-R | Pressure Sensor Range/ Performance | Bad Sensor |
| P0115 | TW | Coolant Temperature Sensor Circuit Malfunction | Open/Short Circuit |
| P0120 | THV | Throttle Position Sensor Circuit Malfunction | Open/Short Circuit |
| P0121 | TH-R | Throttle Position Sensor Range/Performance | Bad Sensor |
| P0125 | TW-CL | Coolant Temp Too Low For Closed Loop Control | Bad Sensor |
| P0130 | FO2-V | Front O2 Sensor Circuit Malfunction | Bad Sensor, Bad Fuel |
| P0133 | FO2-R | Front O2 Sensor Circuit Slow Response | Bad Sensor, Bad Fuel |
| P0135 | FO2H | Front O2 Sensor Heater Circuit Malfunction | Open/Short Circuit |
| P0136 | RO2-V | Rear O2 Sensor Circuit Malfunction | Bad Sensor, Bad Fuel |
| P0139 | RO2-R | Rear O2 Sensor Circuit Slow Response | Bad Sensor, Bad Fuel |
| P0141 | RO2H | Rear O2 Sensor Heater Circuit Malfunction | Open/Short Circuit |
| P0170 | FUEL | Fuel Trim Malfunction | Any Part Of Fuel System |
| P0201 | INJ1 | Fuel Injector No 1 | Inoperative Fuel Injector |
| P0202 | INJ2 | Fuel Injector No 2 | Inoperative Fuel Injector |
| P0203 | INJ3 | Fuel Injector No 3 | Inoperative Fuel Injector |
| P0204 | INJ4 | Fuel Injector No 4 | Inoperative Fuel Injector |
| P0301 | MIS-1 | Cylinder 1 Misfire Detected | Bad Igniter |
| P0302 | MIS-2 | Cylinder 2 Misfire Detected | Bad Igniter |
| P0303 | MIS-3 | Cylinder 3 Misfire Detected | Bad Igniter |
| P0304 | MIS-4 | Cylinder 4 Misfire Detected | Bad Igniter |
| P0325 | KNOCK | Knock Sensor Circuit Malfunction | Open/Short Circuit |
| P0335 | CRANK | Crankshaft Position Sensor | Open/Short Circuit, Bad Sensor |
| P0340 | CAM | Camshaft Position Sensor | Open/Short Circuit, Bad Sensor |
| P0400 | EGR | EGR Flow | Faulty EGR Sys. Function |
| P0403 | EGRSOL | EGR Circuit | EGR System Malfunction |
| P0420 | CAT | CAT Efficiency Below Threshold | Bad CAT, Bad Fuel Control |
| P0441 | CPC-F | Incorrect EVAP Purge Flow | Bad Purge Control Solenoid Valve |
| P0443 | CPC | EVAP Circuit Malfunction | Open/Short Circuit |
| P0500 | VSP | Vehicle Speed Sensor | Bad Sensor |
| P0505 | ISC | Idle Control System | Open/Short Circuit, Bad Idle Solenoid |
| P0506 | ISC-L | Idle RPM Too Low | Bad Idle Solenoid, Air By-Pass |
| P0507 | ISC-H | Idle Too High | Idle Solenoid, Air Leaks |
| P0600 | Serial Communication Link Malfunction | Open/Short Circuit | |
| P0601 | RAM | Memory Check Error | ECM |
| (1) SSM: Subaru select monitor. | |||
| (1) | SSM: Subaru select monitor. |
OBD II DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION CHART
Diagnosis & Repair Procedure
If only code P0101 is displayed, replace MAF sensor and retest. If other codes are displayed, diagnose and repair those codes first and retest.
DTC 507 (ISC_H) - IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
Note. Refer to illustration for connector and terminal identification. see scheme 3- see scheme 28.
- Perform tests and repairs for «DTC P0505»(ref-26154-S05622943112001010500000) .
- Turn ignition to ON. Start engine and allow to idle. Check intake manifold, idle air control solenoid valve and throttle body for loose installation and gasket for cracks, by-pass hose for loose connection or cracking and vacuum hoses for disconnection or cracking. Repair as necessary. If no damage is noted, replace idle air control solenoid valve.