CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR POWER SOURCE)
CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)
CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM)
REPLACE DIESEL THROTTLE BODY ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS (DTC P0488)
REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE CONTROL MOTOR - BATTERY)
REPAIR OR REPLACE HARNESS OR CONNECTOR
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
DTC P0488 Exhaust Gas Recirculation Throttle Position Control Range / Performance |
DESCRIPTION
The ECM opens and closes the throttle valve using a rotary solenoid type actuator. Due to the opening and closing of the valve, the exhaust gas recirculation volume can be properly controlled. Also, engine vibration and noise will be reduced by closing the valve when the engine is stopped.| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
| Perform the following repeatedly for 1 minute: gradually raise the engine speed to 3000 rpm from idling over approximately 10 seconds, and then release the accelerator pedal to return to an idling state. | The throttle motor activation duty is more than a specified value for 30 seconds (1 trip detection logic). |
|
| DTC No. | Data List |
| P0488 | Actual Throttle Position |
| Condition | Throttle Valve Position |
| Moment when accelerator pedal is depressed further or released at 3000 rpm | Throttle valve opening angle varies smoothly |
MONITOR DESCRIPTION
The ECM opens and closes the throttle valve by adjusting the current flowing to the rotary solenoid with a duty ratio. If the throttle valve does not move smoothly or is stuck, the duty ratio used during valve movement control increases or decreases greatly. The ECM will determine that the throttle valve is malfunctioning and illuminate the MIL.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK04AX.html) and initialization (Toyota Fortuner RM000000TIN04KX.html).
- HINT:
- Although the DTC titles say exhaust gas recirculation throttle position control Range / Performance, these DTCs relate to the throttle valve
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
| 1.CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR POWER SOURCE) |
Disconnect the throttle control motor connector.
 |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition T2-2 (B) - Body ground Ignition switch ON 11 to 14 V
Text in Illustration *a Front view of wire harness connector
(to Throttle Control Motor)
Reconnect the throttle control motor connector.
|
| ||||
| OK | |
| 2.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) |
Disconnect the throttle control motor connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition T2-3 (RSC) - Body ground Always Below 1 Ω
Reconnect the throttle control motor connector.
|
| ||||
| OK | |
| 3.CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM) |
Disconnect the throttle control motor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition T2-1 (RSO) - E6-4 (LUSL) Always Below 1 Ω T2-1 (RSO) or E6-4 (LUSL) - Body ground Always 10 kΩ or higher
Reconnect the throttle control motor connector.
Reconnect the ECM connector.
|
| ||||
| OK | |
| 4.REPLACE DIESEL THROTTLE BODY ASSEMBLY |
Replace the diesel throttle body assembly (Toyota Fortuner RM0000013ZD01AX.html).
Turn the ignition switch to ON.
Turn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 10 seconds or more.
| NEXT | |
| 5.CHECK WHETHER DTC OUTPUT RECURS (DTC P0488) |
Clear the DTCs (Toyota Fortuner RM000000PDK0TWX.html).
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the intelligent tester on.
Start the engine.
Over a period of 10 seconds or more, slowly raise the engine speed to 3000 rpm and lower it.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
Result Result Proceed to P0488 is output A No DTC is output B
|
| ||||
| A | |
| 6.REPLACE ECM |
Replace the ECM (Toyota Fortuner RM0000043H100CX.html).
|
| ||||
| 7.REPAIR OR REPLACE HARNESS OR CONNECTOR (THROTTLE CONTROL MOTOR - BATTERY) |
Repair or replace the harness or connector.
|
| ||||
| 8.REPAIR OR REPLACE HARNESS OR CONNECTOR |
Repair or replace the harness or connector.
| NEXT | |
| 9.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
Connect the intelligent tester to the DLC3.
Clear the DTCs (Toyota Fortuner RM000000PDK0TWX.html).
Turn the ignition switch off.
Start the engine.
Over a period of 10 seconds or more, slowly raise the engine speed to 3000 rpm, and then lower it.
Confirm that the DTC is not output again.
- HINT:
- Perform the following procedure using the intelligent tester to determine whether or not the DTC judgment has been carried out.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input DTC P0488.
Check that STATUS is NORMAL. If STATUS is INCOMPLETE or UNKNOWN, over a period of 10 seconds or more, slowly raise the engine speed to 3000 rpm again, and then idle the engine for 5 minutes.
| NEXT | ||
| ||