P2119
FA20 ENGINE CONTROL: SFI SYSTEM: P1160, P2119; Throttle Valve Return Spring Malfunction; 2013 MY FR-S [03/2012 -]
P1160 - Throttle Valve Return Spring Malfunction
P2119 - Throttle Actuator Control Throttle Body Range / Performance
DESCRIPTION
The electronic throttle control system is composed of the throttle actuator, throttle position sensor, accelerator pedal position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to driver inputs. The throttle position sensor detects the opening angle of the throttle valve, and provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.
MONITOR DESCRIPTION
P1160
When the ECM cuts the power supply to the throttle actuator, the throttle valve returns to the fully-closed position by the spring. If the throttle valve does not return with ETCS relay off, the ECM judges throttle valve is stuck and then the ECM illuminates the MIL and stores the DTC.
P2119
The ECM determines the actual opening angle of the throttle valve from the throttle position sensor signal. The actual opening angle is compared to the target opening angle commanded by the ECM. If the difference between these two values is outside the standard range, the ECM interprets this as a malfunction in the electronic throttle control system. The ECM then illuminates the MIL and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All
P1160
P2119 (Case 1)
P2119 (Case 2)
P2119 (Case 3)
P2119 (Case 4)
P2119 (Case 5):
TYPICAL MALFUNCTION THRESHOLDS
P1160
P2119 (Case 1 and Case 2)
P2119 (Case 3, Case 4 and Case 5)
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Reading and Clearing Diagnostic Trouble Codes.
4. Turn the ignition switch off and wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the Techstream on.
6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
7. Depress the accelerator pedal fully and release the accelerator pedal.
8. Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
9. Enter the following menus: Powertrain / Engine / Trouble Codes.
10. Read pending DTCs.
HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P1160 or P2119.
13. Check the DTC judgment result.
HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.
14. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
FAIL-SAFE
When this DTC or other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a fully closed throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
Refer to DTC P2101 P2101.
INSPECTION PROCEDURE
NOTICE:
* Never clean the throttle with motor body assembly.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT
* Refer to "Data List / Active Test" [Throttle Position No. 1, Throttle Motor Position No. 2, Throttle Position Command, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)] Data List / Active Test.
* Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1160 OR P2119)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read DTCs.
Result
HINT
If any DTCs other than P1160 and/or P2119 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART SFI System
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (THROTTLE POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Enter the following menus: Powertrain / Engine / Data List / Throttle Position No. 1 and Throttle Position Command.
(h) Read the values displayed on the Techstream while fully depressing and releasing the accelerator pedal quickly.
Result
HINT
When a DTC is output, the system changes to fail-safe mode. Therefore, only use the data up until the time the DTC is stored for confirmation.
B -- INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
A -- Continue to next step.
3. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
(a) Inspect the throttle with motor body assembly Testing and Inspection.
NG -- REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
OK -- Continue to next step.
4. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
(a) Check for contamination between the throttle valve and housing. If necessary, clean the throttle with motor body assembly. Also, check that the throttle valve moves smoothly.
OK:
Throttle valve is not contaminated with foreign objects and moves smoothly.
NG -- REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
OK -- Continue to next step.
5. READ VALUE USING TECHSTREAM (THROTTLE POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Enter the following menus: Powertrain / Engine / Data List / Throttle Position No. 1, Throttle Position No. 2 and Throttle Position Command.
(h) Read the values displayed on the Techstream while wiggling the ECM wire harness.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read DTCs.
Result
B -- CHECK WHETHER DTC OUTPUT RECURS
A -- Continue to next step.
6. REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE WITH MOTOR BODY ASSEMBLY)
(a) As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector.
NEXT -- END
7. REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
(a) Replace the throttle with motor body assembly Removal.
NEXT -- Continue to next step.
8. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read DTCs.
Result
B -- REPLACE ECM Removal
A -- END