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) Fully depress and release the accelerator pedal while observing the Accelerator Pedal Position (APP) Sensor 2 parameter on the scan tool. Does the scan tool display a value more than or equal to the specified value while the pedal is being depressed and released?
Value: 4.8 V
Yes
=>Go to Prioritized DTC and accelerator pedal position sensor 2 signal voltage check.
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 without DPD) intermittent conditions of engine".
1) Observe the DTC information with a scan tool for DTC P0651 being set at the same time.
Note
2) Turn OFF the ignition switch.
3) Disconnect the accelerator pedal position sensor harness connector (C67).
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.).
4) Turn ON the ignition switch.
5) Observe the Accelerator Pedal Position (APP) Sensor 2 parameter on the scan tool.
Value: 0.1 V
The reading is more than the specified value.
=>Go to Inspection for short to power supply in accelerator pedal position sensor 2 signal circuit.
The reading is less than or equal to the specified value and DTC P0651 is set.
Go to DTC P0651 diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0651 Sensor Reference Voltage 2 Circuit".
The reading is less than or equal to the specified value and DTC P0651 is not set.
=>Go to Accelerator pedal position sensor 2 low reference circuit inspection using test lamp.
1) Connect a test lamp between the accelerator pedal position sensor 2 low reference circuit (pin 2 of C67) and the battery power supply. Does the test lamp illuminate?
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
=>Go to Accelerator pedal position sensor harness connector inspection.
No
=>Go to Inspection for open circuit in low reference circuit of accelerator pedal position sensor 2.
1) Inspect the signal circuit between the ECM (pin 22 of C10) and accelerator pedal position sensor 2 (pin 3 of C67) for the following. Is the result normal?
Note
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
No
Repair the circuit as necessary.
1) Inspect the low reference circuit between the ECM (pin 25 of C8) and accelerator pedal position sensor 2 (pin 2 of C67) for an open circuit or high resistance. Is the result 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
=>Go to ECM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the accelerator pedal position sensor harness connector (pin 2 of C67). 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 accelerator pedal.
Refer to "1.Engine 1I.Speed Control Systems(4JJ3 without DPD) accelerator pedal removal".
Refer to "1.Engine 1I.Speed Control Systems(4JJ3 without DPD) accelerator pedal installation".
No
Repair the connections as necessary.
1) Inspect for poor connections at the ECM harness connector (pin 25 of C8). 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
No
Repair the connections as necessary.
Note
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM removal".
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM installation".
Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without 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) Fully depress and release the accelerator pedal while observing the Accelerator Pedal Position (APP) Sensor 2 parameter on the scan tool. Does the scan tool display a value more than or equal to the specified value while the pedal is being depressed and released?
Value: 4.8 V
Yes
=>Go to Accelerator pedal position sensor 2 signal voltage check.
No
Observe the DTC information with a scan tool.