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Engine Control System - 2.4L: Diagnosis Kia Optima II рестайлинг

Testing & Diagnostics 1 illustration ~678 words

PCM Problem Inspection Procedure

  1. TEST PCM GROUND CIRCUIT: Measure resistance between PCM ground and chassis ground using the backside of PCM harness connector ground as PCM side check point. If the problem is found, repair it. Specification (Resistance) Between terminal 1 of C230-1 connector and chassis ground : 1ohms or less Between terminal 2 of C230-1 connector and chassis ground : 1ohms or less
  2. TEST PCM CONNECTOR: Disconnect the PCM connector and visually check the ground terminals on PCM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
  3. If PCM problem is not found in Step 1 and 2, the PCM could be faulty. If so, replace the PCM with a new one, and then check the vehicle again. If the vehicle operates normally then the problem was likely with the PCM.
  4. RE-TEST THE ORIGINAL PCM : Install the original PCM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again in known good vehicle, replace the swapped PCM with a new one. If problem does not occur, this is intermittent problem.

Component Inspection

  1. Connect a scan tool on Data Link Connector (DLC).
  2. Check MAPS output voltage at idle and IG ON.
ConditionOutput Voltage (V)
Idle0.8-1.6
IG ON3.9-4.1

VOLTAGE SPECIFICATION

  1. Turn ignition switch OFF.
  2. Disconnect IATS connector.
  3. Measure resistance between IATS terminals 3 and 4.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S18211877862010032300000) .
  1. Turn ignition switch OFF.
  2. Disconnect ECTS connector.
  3. Remove the ECTS.
  4. After immersing the thermistor of the sensor into engine coolant, measure resistance between ECTS terminals 3 and 4.
  5. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S08600268382010032300000) .
  1. Check signal waveform of CMPS and CKPS using a scan tool. Specification: Refer to " «WAVEFORM»(ref-357441-S23895931062010032300000) "
  1. Check signal waveform of CKPS and CMPS using a scan tool. Specification: Refer to " «WAVEFORM»(ref-357441-S39582391932010032300000) "
  1. Disconnect the HO2S connector.
  2. Measure resistance between HO2S heater terminals 3 and 5 [B1/S1].
  3. Measure resistance between HO2S heater terminals 3 and 4 [B1/S2].
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S21511524912010032300000) .
  1. Turn ignition switch OFF.
  2. Disconnect injector connector.
  3. Measure resistance between injector terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S42019860662010032300000) .
  1. Turn ignition switch OFF.
  2. Disconnect OCV connector.
  3. Measure resistance between OCV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S04021046662010032300000) .
  1. Turn ignition switch OFF.
  2. Disconnect PCSV connector.
  3. Measure resistance between PCSV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-357441-S36460227612010032300000) .

Scheme 61

Scheme 61: Function And Operation Principle
Scheme 61: Function And Operation Principle

Accelerator Position Sensor (APS) is installed on the accelerator pedal module and detects the rotation angle of the accelerator pedal. The APS is one of the most important sensors in engine control system. It consists of two sensors which control individual sensor power and ground line. The second sensor monitors the first sensor and its output voltage is half of the first one. If the ratio of the sensor 1 and 2 (approximately 1/2) is out of the range, the diagnostic system judges it as abnormal.

  1. Connect a scan tool to the Diagnosis Link Connector (DLC).
  2. Start engine and check output voltages of APS 1 and 2 at C.T and W.O.T. Specification: Refer to «SPECIFICATION»(ref-357441-S17835757722010032300000) .
  3. Turn ignition switch OFF and disconnect the scan tool from the DLC.
  4. Disconnect APS connector and measure resistance between APS terminals 4 and 5 (APS 1). Specification: Refer to «SPECIFICATION»(ref-357441-S17835757722010032300000) .
  5. Disconnect APS connector and measure resistance between APS terminals 1 and 6 (APS 2). Specification: Refer to «SPECIFICATION»(ref-357441-S17835757722010032300000) .
  1. Connect a scan tool on Diagnosis connector (DLC).
  2. Check FTPS output voltage at idle.
ConditionOutput Voltage (V)
IdleApprox. 1.5

VOLTAGE SPECIFICATION

  1. Turn ignition switch OFF.
  2. Disconnect CCV connector.
  3. Measure resistance between CCV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to «SPECIFICATION»(ref-357441-S38811207612010032300000) .
  1. Turn ignition switch OFF.
  2. Disconnect the electric variable swirl control actuator connector.
  3. Measure resistance between VIS valve terminals 1 and 2. Specification: Refer to «SPECIFICATION»(ref-357441-S20329794252010032300000) .

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