SFI SYSTEM, Diagnostic DTC:P2102, P2103

DESCRIPTION

The throttle actuator built into the throttle body assembly is operated by the ECM and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on the throttle body assembly. The TP sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

CONFIRMATION DRIVING PATTERN

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to ON and turn the tester on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the tester on [A].

6. Start the engine.

7. With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].

8. Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.

9. Enter the following menus: Powertrain / Engine and ECT / DTC [C].

10. Read the pending DTCs.

    Tech Tips

    
    

    • 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 and ECT / Utility / All Readiness.

12. Input the DTC: P2102 or P2103.

13. Check the DTC judgment result.

    Tester Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed You should perform driving pattern after confirming DTC enabling conditions
    UNKNOWN	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    Tech Tips

    
    

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] through [C] again and, if necessary, drive the vehicle for a period of time.

FAIL-SAFE

When either of these DTCs, or other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts off the current to the throttle actuator, and the throttle valve is returned to a 6.5° 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 at a minimal speed. If the accelerator pedal is depressed 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

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected: (Throttle Body Assembly)

      Disconnect the throttle body assembly connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition 2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 Ω

   3. Reconnect the throttle body assembly connector.

   
   

   NG

   REPLACE THROTTLE BODY ASSEMBLY Click here

   OK

2. CHECK HARNESS AND CONNECTOR (THROTTLE BODY ASSEMBLY - ECM)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector: (to Throttle Body Assembly)
      *2	Front view of wire harness connector: (to ECM)

      Disconnect the throttle body assembly connector.

   2. Disconnect the ECM connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition B36-2 (M+) - B8-43 (M+) Always Below 1 Ω B36-1 (M-) - B8-42 (M-) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition B36-2 (M+) or B8-43 (M+) - Body ground Always 10 kΩ or higher B36-1 (M-) or B8-42 (M-) - Body ground Always 10 kΩ or higher

   4. Reconnect the throttle body assembly connector.

   5. Reconnect the ECM connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

   
   

   1. Check for foreign objects between the throttle valve and housing.

      OK
      No foreign objects between the throttle valve and housing

   
   

   NG

   REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY

   OK

4. INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)

   
   

   1. Check if the throttle valve opens and closes smoothly.

      OK
      Throttle valve opens and closes smoothly.

   
   

   NG

   REPLACE THROTTLE BODY ASSEMBLY Click here

   OK

   REPLACE ECM Click here