DTC P2229 (Flash Code 71) Barometric Pressure Circuit High (RZ4E-TC)

1. Engine control system check

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) Diagnostic system check-engine controls".

2. Barometric pressure sensor signal voltage check

1) Connect the scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Start the engine.

4) Observe the Barometric Pressure (BARO) Sensor parameter on the scan tool. Is the Barometric Pressure (BARO) Sensor parameter more than or equal to the specified value?

Value: 4.0 V

Yes

=>Go to Prioritized DTC and barometric pressure sensor signal voltage check.

Go to Intermittent conditions of engine.

Refer to "202.Engine 15D.Symptom(RZ4E-TC) intermittent conditions of engine".

3. Prioritized DTC and barometric pressure sensor signal voltage check

1) Observe the DTC information with a scan tool for DTC P0651 being set at the same time.

Note

The diagnostic procedure varies depending on the set DTC.

2) Turn OFF the ignition switch.

3) Disconnect the barometric pressure sensor harness connector (C37).

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

4) Turn ON the ignition switch.

5) Observe the Barometric Pressure (BARO) Sensor parameter on the scan tool.

Value: 0.1 V

The reading is more than the specified value.

=>Go to Inspection for short to power supply in barometric pressure sensor signal circuit.

The reading is less than or equal to the specified value and DTC P0651 is set.

Go to DTC P0651 diagnosis.

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0651 (Flash Code 56) Sensor Reference Voltage 2 Circuit".

The reading is less than or equal to the specified value and DTC P0651 is not set.

=>Go to Barometric pressure sensor low reference circuit inspection using test lamp.

4. Barometric pressure sensor low reference circuit inspection using test lamp

1) Connect a test lamp between the barometric pressure sensor low reference circuit (pin 1 of C37) and the battery power supply. Does the test lamp illuminate?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Barometric pressure sensor harness connector inspection.

=>Go to Inspection for open circuit in barometric pressure sensor low reference circuit.

5. Inspection for short to power supply in barometric pressure sensor signal circuit

1) Inspect the signal circuit between the ECM (pin 71 of C7) and the barometric pressure sensor (pin 2 of C37) for the following. Is the result normal?

Short to the battery power supply circuit or short to the ignition power supply circuit
Short to the 5 V reference circuit

Note

The barometric pressure sensor may be damaged if the sensor signal circuit is shorted to the power supply.

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to ECM replacement.

Repair the circuit as necessary.

=>Go to Repair verification.

6. Inspection for open circuit in barometric pressure sensor low reference circuit

1) Inspect the low reference circuit between the ECM (pin 60 of C7) and the barometric pressure sensor (pin 1 of C37) for an open circuit or high resistance. Is the result normal?

Caution

The barometric pressure sensor shares the low reference circuit with other sensors. A malfunction in the low reference circuit may set DTCs on sensors that share this circuit.

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to ECM harness connector inspection.

Repair the circuit as necessary.

=>Go to Repair verification.

7. Barometric pressure sensor harness connector inspection

1) Inspect for poor connections at the barometric pressure sensor harness connector (pin 1 of C37). Is the connection status normal?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

Replace the barometric pressure sensor.

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) barometric pressure sensor removal".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) barometric pressure sensor installation".

=>Go to Repair verification.

Repair the connections as necessary.

=>Go to Repair verification.

8. ECM harness connector inspection

1) Inspect for poor connections at the ECM harness connector (pin 60 of C7). Is the connection status normal?

Refer to "RHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Engine Control (RZ4E)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to ECM replacement.

Repair the connections as necessary.

=>Go to Repair verification.

9. ECM replacement

Note

Perform programming after replacing the ECM.

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM removal".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM installation".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM setting".

Procedure completion

=>Go to Repair verification.

10. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Start the engine.

4) Operate the vehicle under the conditions for running the DTC.

5) Observe the DTC information with a scan tool.