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Engine Controls - Tests W/codes: Adjustments Chrysler LHS II

Testing & Diagnostics ~468 words

TEST NTC-6A: CHECKING COOLANT SENSOR CALIBRATION

Note. Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS before proceeding.

  1. Turn ignition on. Using scan tool, read Engine Coolant Temperature (ECT) sensor value. If engine operating temperature is more than 180°F (82°C), allow engine to cool to 150°F (66°C). Start engine. While monitoring scan tool, allow engine to reach normal operating temperature of more than 180°F (82°C). Go to next step.
  2. If ECT sensor value increased in a smooth transition, go to next step. If ECT sensor value did not increase in a smooth transition, verify engine cooling system is not malfunctioning. If engine cooling system is malfunctioning, repair as necessary. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) . If engine cooling system is not malfunctioning, replace ECT sensor. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) .
  3. If engine coolant temperature reached 180°F (82°C) or more, cooling system is functioning properly. Test is complete. If engine coolant temperature did not reach 180°F (82°C) or more, verify engine cooling system is not malfunctioning. If engine cooling system is malfunctioning, repair as necessary. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) . If engine cooling system is not malfunctioning, replace ECT sensor. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) .

TEST NTC-7A: CHECKING THROTTLE POSITION SENSOR CALIBRATION

Note. Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS before proceeding.

  1. Turn ignition on with engine off. Inspect Powertrain Control Module (PCM) connectors and Throttle Position (TP) sensor connector for loose or dirty connections. Using scan tool, read TP sensor voltage. Ensure throttle is closed against throttle stop. If voltage is .9 volts or less, go to next step. If voltage is more than .9 volts, replace TP sensor. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) .
  2. While observing voltage on scan tool, slowly open throttle to Wide Open Throttle (WOT). If voltage change was smooth, go to next step. If voltage change was not smooth, replace TP sensor. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) .
  3. If voltage was at least 3.4 volts at WOT, TP sensor is functioning properly. Test is complete. If voltage was not at least 3.4 volts at WOT, replace TP sensor. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000) .

TEST NTC-8A: CHECKING MAP SENSOR CALIBRATION

Note. Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS before proceeding.

Turn engine off. Tee a vacuum gauge to a manifold vacuum source. Start engine. Allow engine to idle. If engine will not idle, maintain a constant RPM above idle. Using scan tool, read Manifold Absolute Pressure (MAP) sensor vacuum. If scan tool vacuum reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If scan tool vacuum reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor. Perform TEST VER-2A: ROAD TEST VERIFICATION .

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