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
=>Go to Intake throttle position sensor 5 V reference voltage check.
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 without DPD) intermittent conditions of engine".
1) Turn OFF the ignition switch.
2) Disconnect the intake throttle valve harness connector (E25).
3) Turn ON the ignition switch.
4) Measure the voltage between the intake throttle position sensor 5 V reference circuit (pin 2 of E25) and the body ground with a DMM.
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.).
Value: 4.5 to 5.5 V
The reading is more than the specified value.
=>Go to Inspection for short to power supply in 5 V reference circuit.
The reading is within the specified range.
Replace the intake throttle valve.
Refer to "1.Engine 1B.Mechanical(4JJ3 without DPD) Intake throttle valve removal".
Refer to "1.Engine 1B.Mechanical(4JJ3 without DPD) Intake throttle valve installation".
The reading is less than the specified value.
=>Go to Clutch pedal stroke sensor 5 V reference voltage check.
1) Turn OFF the ignition switch.
2) Disconnect the clutch pedal stroke sensor harness connector (C73).
3) Turn ON the ignition switch.
4) Measure the voltage between the intake throttle position sensor 5 V reference circuit (pin 2 of E25) and the body ground with a DMM. Is the voltage more than or equal to the specified value?
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.).
Value: 4.5 V
Yes
Replace the clutch master cylinder.
Refer to "5.Transmission, Transaxle 5E.Clutch System(MVL) clutch control removal".
Refer to "5.Transmission, Transaxle 5E.Clutch System(MVL) clutch control installation".
No
=>Go to Inspection for short to ground in 5 V reference circuit.
1) Inspect 5 V reference circuit 3 between the ECM (pin 28 of C9) and the following components for a short to ground or a short to the low reference circuit. 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.).
2) Inspect 5 V reference circuit 9 between the ECM (pin 29 of E3) and the following components for a short to ground or a short to the low reference circuit. 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.).
3) Are all of the results normal?
Yes
No
Repair the circuit as necessary.
1) Inspect 5 V reference circuit 3 between the ECM (pin 28 of C9) and the following components for a short to the battery power supply circuit or a short to the ignition power supply circuit. 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.).
2) Inspect 5 V reference circuit 9 between the ECM (pin 29 of E3) and the following components for a short to the battery power supply circuit or a short to the ignition power supply circuit. 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.).
3) Are all of the results normal?
Yes
No
Repair the circuit 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) Operate the vehicle under the conditions for running the DTC.
5) Observe the DTC information with a scan tool.