Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Diagnostic system check-engine controls".
1) Connect the scan tool.
2) Turn OFF the ignition switch for 1 minute or more.
3) Start the engine.
4) Observe the DTC information with a scan tool. Is DTC P0651 set at the same time?
Yes
Go to DTC P0651 diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0651 Sensor Reference Voltage 2 Circuit".
No
=>Go to FRP sensor signal voltage check.
1) Observe the Fuel Rail Pressure (FRP) Sensor parameter on the scan tool. Is the Fuel Rail Pressure (FRP) Sensor parameter less than or equal to the specified value?
Value: 0.4 V
Yes
=>Go to FRP sensor signal output voltage check.
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) intermittent conditions of engine".
1) Turn OFF the ignition switch.
2) Disconnect the FRP sensor harness connector (E45).
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
3) Turn ON the ignition switch.
4) Observe the Fuel Rail Pressure (FRP) Sensor parameter on the scan tool. Is the Fuel Rail Pressure (FRP) Sensor parameter more than or equal to the specified value?
Value: 4.5 V
Yes
=>Go to FRP sensor 5 V reference voltage check.
No
=>Go to Inspection for short to ground in FRP sensor signal circuit.
1) Measure the voltage between the FRP sensor 5 V reference circuit (pin 1 of E45) and the body ground with a DMM. Is the voltage more than or equal to the specified value?
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Value: 4.5 V
Yes
=>Go to FRP sensor harness connector inspection.
No
=>Go to Inspection for open circuit in FRP sensor 5 V reference circuit.
1) Inspect the signal circuit between the ECM (pin 29 of E2) and the FRP sensor (pin 2 of E45) for the following. Is the result normal?
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the circuit as necessary.
1) Inspect the 5 V reference circuit between the ECM (pin 30 of E3) and the FRP sensor (pin 1 of E45) for an open circuit or high resistance. Is the result normal?
Caution
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to ECM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the FRP sensor harness connector (pin 1 of E45). Is the connection status normal?
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Replace the fuel rail.
Refer to "1.Engine 1C.Fuel System(4JJ3 with DPD) common rail (fuel rail) removal".
Refer to "1.Engine 1C.Fuel System(4JJ3 with DPD) common rail (fuel rail) installation".
No
Repair the connections as necessary.
1) Inspect for poor connections at the ECM harness connector (pin 30 of E3). Is the connection status normal?
Refer to "RHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "LHD Engine Control (4JJ3 with DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the connections as necessary.
Note
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM removal".
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM installation".
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM setting".
Procedure completion
1) Clear the DTC with a scan tool.
2) Turn OFF the ignition switch for 1 minute 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.