Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without 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
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 without DPD) intermittent conditions of engine".
1) Inspect for the following. Is the result normal?
Yes
=>Go to EGR valve harness connector inspection.
No
Repair as necessary.
1) Inspect for poor connections at the EGR valve harness connector (pins 3 and 4 of E32). Is the connection status normal?
Refer to "LHD Engine Control (4JJ3 without DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Engine Control (4JJ3 without DPD)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Replace the EGR valve.
Refer to "1.Engine 1H.Aux. Emission Control Devices(4JJ3 without DPD) EGR valve removal".
Refer to "1.Engine 1H.Aux. Emission Control Devices(4JJ3 without DPD) EGR valve installation".
No
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.