RM36D0EC _51 Engine / Hybrid System _083058 M20D-FKS ENGINE CONTROL _0401834 SFI SYSTEM C

M20D-FKS ENGINE CONTROL  SFI SYSTEM  P01201C  Throttle / Pedal Position Sensor / Switch "A" Circuit Voltage Out of Range  


DESCRIPTION

Refer to DTC P012011.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>P012011

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P01201C Throttle / Pedal Position Sensor / Switch "A" Circuit Voltage Out of Range The difference between the output voltage of VTA1 and VTA2 is less than 0.8 V, or higher than 1.6 V for less than 2 seconds (1 trip detection logic).
·

Throttle position sensor (throttle body with motor assembly)

·

Throttle position sensor circuit

·

ECM


Comes on DTC stored SAE: P0121

MONITOR DESCRIPTION

The ECM uses the throttle position sensor to monitor the throttle valve opening angle. There are several checks that the ECM performs to confirm the proper operation of the throttle position sensor.

This sensor transmits two signals: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and VTA2 is used to detect malfunctions in VTA1. The ECM performs several checks to confirm the proper operation of the throttle position sensor and VTA1.

For each throttle opening angle, a specific voltage difference is expected between the outputs of VTA1 and VTA2. If the output voltage difference between the two signals deviates from the normal operating range, the ECM interprets this as a malfunction of the throttle position sensor, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

HINT:
·

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR



A408677E20
2.646,2 2.375,1.344 2.375,1.344 2.656,1.344 false 4.948,1.99 5.146,1.385 5.146,1.385 5.417,1.385 false 3.792,1.177 3.521,0.521 3.521,0.521 3.802,0.521 false 0.5,2.167 1.656,2.375 1.156,0.208 10 false Ignition switch ON 1.281,1.906 3.333,2.177 2.052,0.271 10 false Idling 2.125,2.042 2.813,2.344 0.688,0.302 10 false [A] 3.833,1.688 4.521,1.99 0.688,0.302 10 false [B] 4.677,1.792 5.365,2.094 0.688,0.302 10 false [C] 5.021,2.969 5.708,3.271 0.688,0.302 10 false [D] 4.427,2.635 5.094,3.021 0.667,0.385 10 false 2 seconds or more 2.719,1.281 3.823,1.552 1.104,0.271 10 false Released 5.469,1.323 6.573,1.594 1.104,0.271 10 false Released 3.865,0.448 4.969,0.719 1.104,0.271 10 false Depressed

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

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

5.

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

6.

Turn the ignition switch to ON [A].

7.

Turn the GTS on.

8.

Start the engine.

9.

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

10.

Idle the engine for 2 seconds or more [C].

11.

Enter the following menus: Powertrain / Engine / Trouble Codes [D].

12.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



13.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

14.

Input the DTC: P01201C.

15.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

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

·

If the judgment result is ABNORMAL, the system is malfunctioning.

·

If the judgment result is INCOMPLETE, perform steps [B] through [D] again.

·

[A] to [D]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

·

When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.




FAIL-SAFE

When this DTC is 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 7.5° throttle valve opening 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 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 turned off.

CAUTION / NOTICE / HINT

HINT:
·

DTC P01201C is stored when the VTA1 and VTA2 output voltages are not consistent with the sensor characteristics. Therefore, check the Freeze Frame Data for this DTC. Use the following formula to confirm the relative differences in voltage.

Characteristic Sensor Output:

VTA2 x 0.8 is approximately equal to VTA1 + 1.11 V

VTA1: Throttle Position Sensor No.1 Voltage

VTA2: Throttle Position Sensor No.2 Voltage


·

Read Freeze Frame Data using the GTS. 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 HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
a.

Disconnect the throttle body with motor assembly connector.


b.

Disconnect the ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C15-2 (VC) - C71-158 (VCTA) Always Below 1 Ω
C15-1 (VTA) - C71-159 (VTA1) Always Below 1 Ω
C15-3 (VTA2) - C71-127 (VTA2) Always Below 1 Ω
C15-4 (E2) - C71-157 (ETA) Always Below 1 Ω
C15-2 (VC) or C71-158 (VCTA) - Body ground and other terminals Always 10 kΩ or higher
C15-1 (VTA) or C71-159 (VTA1) - Body ground and other terminals Always 10 kΩ or higher
C15-3 (VTA2) or C71-127 (VTA2) - Body ground and other terminals Always 10 kΩ or higher



d.

Inspect the condition of the terminals of the connectors.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (RESISTANCE OF ECM)

NG

2.REPAIR OR REPLACE HARNESS OR CONNECTOR
2.REPAIR OR REPLACE HARNESS OR CONNECTOR
a.

Repair or replace the wire harness or connector.


Result:
Proceed to
NEXT



NEXT

3.CLEAR DTC
3.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

e.

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


Result:
Proceed to
NEXT



NEXT

4.CHECK WHETHER DTC OUTPUT RECURS (DTC P01201C)
4.CHECK WHETHER DTC OUTPUT RECURS (DTC P01201C)
a.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


b.

Enter the following menus: Powertrain / Engine / Trouble Codes.


c.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372
Result:
Result Proceed to
DTCs are not output A
DTC P01201C is output B




A

END

B

5.CHECK HARNESS AND CONNECTOR (RESISTANCE OF ECM)
5.CHECK HARNESS AND CONNECTOR (RESISTANCE OF ECM)
a.

Disconnect the throttle body with motor assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C15-2 (VC) - C15-1 (VTA) Ignition switch off 190 to 210 kΩ
C15-2 (VC) - C15-3 (VTA2) Ignition switch off 190 to 210 kΩ



HINT:

Perform "Inspection After Repair" after replacing the throttle body with motor assembly.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION


Result:
Proceed to
OK
NG



OK

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>THROTTLE BODY>REMOVAL


NG

REPLACE ECM

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>ECM>REMOVAL