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) Remove the ventilation duct if it is connected to the exhaust tail pipe.
4) Turn ON the ignition switch for 30 seconds.
5) Observe the DTC information with a scan tool. Is DTC P2454 set at the same time?
Yes
Go to DTC P2454 diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2454 Differential Pressure Sensor Circuit Low".
No
=>Go to DPD components inspection.
1) Inspect possible causes of the low exhaust differential pressure for the following. Is the result normal?
Note
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) exhaust differential pressure sensor installation".
2) Inspect the exhaust system for the following conditions. Is the result normal?
3) Are all of the results normal?
Yes
No
Repair or replace as necessary.
Note
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) exhaust differential pressure sensor installation".
=>Go to DPD Forced Regeneration.
1) Remove the DPD.
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD removal".
2) Inspect the DPD for damage, cracking, or melting. Is the result normal?
Yes
=>Go to Exhaust differential pressure sensor circuit inspection.
No
Replace the DPD.
Note
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD removal".
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".
=>Go to DPD Forced Regeneration.
1) Inspect for poor connections at the exhaust differential pressure sensor harness connector (pins 1, 2, and 3 of E98). Is the connection status normal?
2) Inspect for poor connections at the ECM harness connector (pin 27 of E1, and pins 19 and 28 of E3). Is the connection status normal?
3) Inspect the circuit between the ECM (pin 27 of E1, and pins 19 and 28 of E3) and the exhaust differential pressure sensor (pins 1, 2, and 3 of E98) for 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.).
4) Are all of the results normal?
Yes
Replace the exhaust differential pressure sensor.
Note
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) exhaust differential pressure sensor removal".
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) exhaust differential pressure sensor installation".
=>Go to DPD Forced Regeneration.
No
Repair the circuit or connection as necessary.
=>Go to DPD Forced Regeneration.
Note
1) Reconnect all of the disconnected harness connectors and components.
2) Perform the clearing of the DTC and DPD Regeneration Data Reset with a scan tool.
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".
3) Turn OFF the ignition switch for 1 minute or more.
4) Perform DPD Forced Regeneration with a scan tool.
Procedure completion
=>Go to DPD exhaust differential pressure check.
1) Perform Exhaust Differential Pressure Sensor Learning.
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".
2) Observe the Exhaust Gas Temperature 1 parameter on the scan tool.
Value: 170 ℃ { 338 °F }
3) If the reading is more than the specified value, run the engine at 1,500 rpm with no load until the temperature is lowered to reach the specified value.
4) Observe the Exhaust Differential Pressure parameter when the Exhaust Gas Temperature 1 parameter reaches the specified value with the accelerator pedal fully depressed. Is the Exhaust differential pressure parameter less than or equal to the specified value?
Value: 190 ℃ { 374 °F } Exhaust Gas Temperature 1
Value: 16.0 kPa { 2.3 psi } Exhaust Differential Pressure
Yes
Observe the DTC information with a scan tool.
No
Replace the DPD.
Note
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD removal".
Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".