Test Procedure
- Turn ignition off. Connect Hi-Scan Pro/Kia Data Pro Scan tool or equivalent to OBD-II Data Link Connector. See Figure. Start engine. Allow engine to idle until reaches normal operating temperature. Monitor TP sensor voltage signal. See THROTTLE POSITION SENSOR OUTPUT VOLTAGE SPECIFICATIONS table. If voltages are as specified, problem is intermittent. Check TP sensor and ECM for proper harness connections and go to step 9. If any voltage is not as specified, go to next step.THROTTLE POSITION SENSOR OUTPUT VOLTAGE SPECIFICATIONS
Engine Speed - RPM TPS Output - Voltage Idle 0.3-0.9 Fully Open 4.0-4.6 - With engine running and using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent. Monitor TP sensor voltage signal. Voltage signal should increase evenly while opening throttle. If voltage is as specified, go to next step. If voltage is not as specified, temporarily install a known-good TP sensor and check for proper operation. If problem is corrected, replace TP sensor and go to step 9.
- Turn ignition off. Thoroughly check TP sensor. Also check for loose, bent or corroded TP sensor orECM connectors terminals. If sensor and connectors terminals are okay, go to next step. If sensor and connectors terminals are faulty, repair or replace as necessary and go to step 9.
- Disconnect TP sensor 3-pin harness connector. See Fig 1. Turn ignition on. Measure voltage between ground and TP sensor connector terminal No. 3 (Green/White wire). Voltage should be approximately 5 volts. If voltage is as specified, go to next step. If voltage is not as specified, repair open or short circuit as necessary and go to step 9.
- Turn ignition off. Disconnect ECM harness connector "M". See Figure. Measure resistance between TP sensor connector terminal No. 2 (Black/White wire) and ECM connector terminal M20. Also measure resistance between TP sensor connector terminal No. 1 (Blue wire) and ECM harness connector terminal M19. Both resistances should be below one ohm. If resistances are as specified, go to next step. If any resistance is not as specified, repair open or short circuit as necessary and go to step 9.
- With TP sensor and ECM harness connectors disconnected. Turn ignition on. Measure voltage between ground and TP sensor connector terminal No. 1 (Blue wire). Voltage should be below 0.5 volts. If voltage is as specified, go to next step. If voltage is not as specified, repair short circuit as necessary and go to step 9.
- Turn ignition off. With TP sensor and ECM harness connectors disconnected. Measure resistance between ground and TP sensor connector terminal No. 1 (Blue wire). Resistance should be infinite. If resistance is as specified, go to next step. If resistance is not as specified, repair short circuit as necessary and go to step 9.
- With TP sensor and ECM harness connectors disconnected. Measure resistance between TP sensor connector terminal No. 1 (Blue wire) and No.2 (Black/White wire). Measure resistance between terminal No. 1 (Blue wire) and No. 3 (Green/White wire). Measure resistance between terminal No.2 (Black/White wire) and No. 3 (Green/White wire). All resistances should be infinite. If resistances are as specified, temporarily install a known-good TP sensor and check for proper operation. If problem is corrected, replace TP sensor and go to next step. If resistance is not as specified, repair short circuit as necessary and go to next step.
- After repair, return vehicle to original condition. Clear codes using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.