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| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The evaporative emission (EVAP) system uses a EVAP leak detection pump to test for system leaks. The EVAP leak detection pump assembly consists of the following components:
| • | EVAP leak detection pump with reference orifice |
| • | EVAP leak detection pump switching valve |
| • | EVAP leak detection pump pressure sensor |
The EVAP leak detection vacuum pump stuck off test is performed by comparing an initial stabilised EVAP leak detection pump pressure sensor, absolute, reading to a second stabilised reading for a short period of time.
The EVAP leak detection vacuum pump stuck on test is performed after the switching valve transitions from vent to not venting, pump, position. If after the second EVAP leak detection pump pressure sensor reading, a difference between the two pressure readings indicates the EVAP leak detection vacuum pump is stuck on.
| • | DTCs P043E, P043F, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P012B, P012C, P012D, P0222, P0223, P0449, P0451, P0452, P0453, P0461, P0462, P0463, P0498, P0499, P0502, P0503, P06E4, P0722, P0723, P1221, P1458, P1459, P145A, P145C, P145D, P145E, P2066, P2067, P2068, P2400, P2401, P2402, P2418, P2419, P2420, P2421, P2422, P2450, P2537, P2610, U0073, U0074, U0140, U182D is not set. |
| • | The propulsion system is not active |
| • | The EVAP purge valve is closed |
| • | The EVAP vent solenoid valve is closed |
| • | The EVAP Leak Detection Pump switching valve is in the vent position |
| • | The EVAP Leak Detection Pump vacuum pump is ON |
| • | The odometer greater than 16 km (10 mi) |
| • | The barometric pressure (BARO) is between 70-110 kPa (10-16 PSI) |
| • | The fuel level is between 10-90% |
| • | The engine coolant temperature is less than 40°C (104°F) |
| • | The inlet air temperature is between 4-45°C (39-113°F) |
| • | The system voltage is greater than 10 V |
| • | The vehicle speed is less than 1.6 km/h (1 MPH) |
| • | No ignition key up during test |
| • | The refuelling request button is not pressed |
| • | A service bay test is not active |
| • | The device control is not active |
| • | There are three possible time windows for this test to run. Up to that point and through this time period the propulsion system must not be active. These time windows are: 5.0, 7.0 or 9.5 hours |
The EVAP leak detection pump is commanded ON during the first reference orifice vacuum measurement and the stabilized EVAP leak detection pump pressure sensor vacuum reading is less than 0.1 kPa (0.01 PSI) for greater than 6 min.
Or
The EVAP leak detection pump is commanded ON during the second reference orifice vacuum measurement and the stabilized EVAP leak detection pump pressure sensor vacuum reading is less than 0.1 kPa (0.01 PSI) for greater than 30 s.
The EVAP leak detection pump is commanded OFF for the first time and the EVAP leak detection pump switching valve has transitioned from vent to not venting, pump position. The difference between an initial EVAP leak detection pump pressure sensor reading and a second EVAP leak detection pump pressure sensor reading is greater than 1 kPa (0.14 PSI) for greater than 8 s.
Or
The EVAP leak detection pump is commanded OFF for the second time and the EVAP leak detection pump pressure sensor vacuum reading is greater than 1.18 kPa (0.17 PSI) for greater than 14 s.
DTCs P145C and P145D are Type B DTCs.
DTCs P145C and P145D are Type B DTCs.
Evaporative Emission Control System Description
Hybrid Modes of Operation Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
| • | Vehicle in Service Mode, verify the scan tool parameter for the EVAP leak detection pump pressure compared against the conditions for setting. |
| ⇒ | If found out of range proceed to Circuit/System Testing. |
| • | Verify that DTCs P2400, P2401 or P2402 is not set. |
| ⇒ | If any of the DTCs are set refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions . |
| ⇓ | If none of the DTCs are set. |
| • | Inspect for any aftermarket devices added that might have spliced into wire harness circuits that control the EVAP leak detection pump. |
| • | Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data. |
| ⇒ | If found out of range, replace the Q63 evaporative emission system leak detection pump assembly. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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