Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Diagnostic system check-engine controls".
1) Turn OFF the ignition switch.
2) Disconnect the EGR valve harness connector (E32).
3) Connect a test lamp between the ignition power supply circuit (pin 1 of E32) and the body ground.
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.).
4) Turn ON the ignition switch. Does the test lamp illuminate?
Yes
=>Go to Inspection for open circuit in EGR valve ground circuit.
No
Repair the open circuit or high resistance in the ignition power supply circuit between the ENGINE 15A fuse and the EGR valve (pin 1 of E32). Inspect the ENGINE 15A fuse first.
1) Turn OFF the ignition switch.
2) Connect a test lamp between the ignition power supply circuit and the ground circuit (pins 1 and 2 of E32).
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. Does the test lamp illuminate?
Yes
=>Go to Inspection for open circuit and short circuit in CAN circuit.
No
Repair the open circuit or high resistance in the ground circuit between the EGR valve (pin 2 of E32) and the body ground.
1) Inspect the CAN High circuit and CAN Low circuit between the ECM (pins 7 and 9 of C10) and the EGR valve (pins 3 and 4 of E32) 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 EGR valve harness connector inspection.
No
Repair the circuit 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 "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 EGR valve.
Refer to "1.Engine 1H.Aux. Emission Control Devices(4JJ3 with DPD) EGR valve removal".
Refer to "1.Engine 1H.Aux. Emission Control Devices(4JJ3 with DPD) EGR valve installation".
No
Repair the connections as necessary.
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.