Kia Niro: Engine Control System / ETC (Electronic Throttle Control) System Repair procedures

Kia Niro 2017 (DE HEV) Service Manual / Engine Control/Fuel System / Engine Control System / ETC (Electronic Throttle Control) System Repair procedures

Inspection

Throttle Position Sensor (TPS)

1.

Connect the KDS/GDS on the Data Link Connector (DLC).

2.

Start the engine and measure the output voltage of TPS 1 and 2 at C.T. and W.O.T.

[Throttle Position Sensor (TPS)]

Throttle angle(°)
Output Voltage (V) [Vref=5V]
TPS1
TPS2
0
0.5
4.5
10
0.96
4.05
20
1.41
3.59
30
1.87
3.14
40
2.32
2.68
50
2.78
2.23
60
3.23
1.77
70
3.69
1.32
80
4.14
0.86
90
4.6
0.41
98
4.65
0.35
C.T (0)
0.5
4.5
W.O.T (86)
4.41
0.59

ETC Motor

1.

Switch "OFF" the ignition.

2.

Disconnect the ETC module connector.

3.

Measure resistance between the ETC module terminals 1 and 2.

4.

Check that the resistance is within the specification.

Specification: 0.3 - 100 Ω [20°C (68 °F)]

Removal
1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Remove the air cleaner.

(Refer to Engine Mechanical System - “Air Cleaner”)

3.

Disconnect the ETC module connector (A).

4.

Remove the installation bolts, and then remove the ETC module (B) from the engine.

Electronic throttle body mounting bolt:

7.8 - 9.8 N·m (0.8 - 1.0 kgf·m, 5.7 - 7.2 lb·ft)

Installation
  

Install the component to the specified torque.

Note that internal damage may occur if the component is dropped. If the component has been dropped, inspect it before installation.

When cleaning the throttle body, clean the valve and carbon at the bore with the cloth wet with the cleaner.

Do not spray the engine cleaner on the throttle body.

Be careful that fingers or cloth are not caught in the valve.

When installing the throttle body, make sure that foreign materials do not enter the throttle body.

1.

Install in the reverse order of removal.

Adjustment
ETC module learning procedure

Be sure to perform the ETC module learning procedure when replacing or re-installing the ETC module.

1.

Wait for one minute with the ignition switched "ON".

2.

Start and keep the engine idle for 15 minutes.

3.

Wait for one minute with the ignition switched "OFF".

4.

Restart the engine, and check that the idle speed is stable.

  

If the ETC module learning procedure is not performed after replacing or reinstalling the ETC module, MIL illumination with DTCs may occur.

Auto Dection Reset Procedure
  

After replacing the ETC module, the "ECM Auto Detection Reset" procedure must be performed.

1.

Switch "OFF" the ignition.

2.

Connect the KDS/GDS to Data Link Connector (DLC).

3.

Switch "ON" the ignition.

4.

Select "Vehicle, Model year, Engine, System".

5.

Select "Vehicle S/W Management".

6.

Select "ECM Auto Detection Reset".

Cleaning
1.

Remove the ETC module.

(Refer to Engine Control System - "ETC System")

2.

Keep the ETC module plate (A) open.

3.

Clean the pollutant in the throttle body with a soft cloth moistened by cleaning fluid.

  

Do not spray cleaning fluid directly onto ETC module. Instead, use a lint-free cloth moistened by cleaning fluid.

Be careful not to clean off the coating fluid around the shaft. If coating fluid is removed, idling control failure may occur from inflow of foreign substances or excessive air leakage.

4.

After cleaning, reinstall the ETC module and then perform the ETC module learning procedure.

(Refer to Engine Control System - "ETC System" - Adjustment)

ETC (Electronic Throttle Control) System Schematic diagrams
Circuit Diagram Harness Connector ...

ETC (Electronic Throttle Control) System Troubleshooting
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