1. DTC P2228 description
The barometric pressure sensor is installed to the air cleaner. The barometric pressure sensor changes the signal voltage in accordance with changes in the barometric pressure. The sensor has the following circuits.
- 5 V reference circuit
- Low reference circuit
- Barometric pressure sensor signal circuit
The barometric pressure sensor sends signals related to the barometric pressure changes to the ECM via the signal circuit. The ECM detects a low signal voltage at high altitudes and with low barometric pressure. The ECM detects a high signal voltage with high barometric pressure. The ECM uses this voltage signal to adjust the fuel injection quantity and injection timing, as well as make altitude corrections. If the ECM detects an excessively low signal voltage, the DTC is set.
2. Condition for setting DTC P2228
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition voltage is 9 to 16 V.
- The ignition switch is ON.
- DTC P060B is not set.
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P060B (Flash Code 36) Internal Control Module A/D Processing Performance".
Condition for setting the DTC
- The ECM detects that the barometric pressure sensor signal voltage is 0.5 V or less for 3.2 seconds.
3. Action taken when DTC P2228 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".
- The ECM assumes a default barometric pressure value.
- The ECM limits the fuel injection quantity.
- The ECM inhibits pre-injection.
- The ECM inhibits the EGR control.
- The ECM inhibits the cruise control.
4. Condition for clearing DTC P2228
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".