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 a DTC set?
Yes
=>Go to Cylinder No. 1 injector harness connector inspection.
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) intermittent conditions of engine".
1) Inspect for poor connections at the cylinder No. 1 injector harness connector (pins 1 and 2 of E8). 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
=>Go to No. 1 cylinder injector solenoid inspection.
No
Repair the connections as necessary.
1) Measure the resistance of the No. 1 cylinder injector solenoid with a DMM. Is the resistance less than or equal to the specified value?
Value: 2.0 Ω
Yes
=>Go to Injector charge voltage circuit resistance check.
No
Replace the cylinder No. 1 injector.
Note
Refer to "1.Engine 1C.Fuel System(4JJ3 with DPD) injector removal".
Refer to "1.Engine 1C.Fuel System(4JJ3 with DPD) injector installation".
1) Turn OFF the ignition switch.
2) Disconnect the cylinder No. 1 and No. 4 injector harness connectors (E8, E11).
3) Measure the resistance in the charge voltage circuit between the cylinder No. 1 injector harness (pin 2 of E8) and the cylinder No. 4 injector harness (pin 2 of E11) with a DMM. Is the resistance less 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: 1.0 Ω
Yes
No
=>Go to Inspection for open circuit in cylinder No. 1 injector charge voltage circuit.
1) Inspect the charge voltage circuit between the ECM (pin 4 of E3) and the cylinder No. 1 injector (pin 2 of E8) for an open circuit or high resistance. 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
=>Go to ECM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect the solenoid control circuit between the ECM (pin 7 of E2) and the cylinder No. 1 injector (pin 1 of E8) 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
=>Go to ECM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the ECM harness connector (pin 7 of E2, and pin 4 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.