Engine Controls - Tests W/codes - 2.5L Tbi: Adjustments Dodge Dakota WS

TEST NTC-5A - CHECKING TPS CALIBRATION

1. Turn engine off. Turn ignition on. Using DRB, read Throttle Position Sensor (TPS) voltage. Ensure throttle is fully closed and against throttle stop.
2. If voltage is not 1.5 volts or less with throttle closed, replace TPS. Perform «TEST VER-2»(ref-10881-S18660743652000111000000) . If voltage is 1.5 volts or less with throttle closed, watch voltage while slowly opening throttle wide open. If voltage change was not smooth, replace TPS. Perform TEST VER-2. If voltage change was smooth, go to next step.
3. If maximum voltage was not at least 3.4 volts at wide open throttle, replace TPS. Perform TEST VER-2. If maximum voltage was at least 3.4 volts at wide open throttle, TPS is functioning properly. Test is complete.

TEST NTC-6A - CHECKING MAP SENSOR CALIBRATION

1. Turn engine off. Install vacuum "T" in MAP sensor vacuum hose. Install vacuum gauge. Start engine, and let it idle. If engine will not idle, maintain a constant RPM above idle. Using DRB, read MAP gauge. If reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If reading is not within one in. Hg of vacuum gauge reading, turn engine off.
2. Disconnect vacuum gauge from MAP sensor vacuum hose. Connect an auxiliary vacuum pump to MAP sensor. Apply 5 in. Hg to MAP sensor. Using DRB, read and record MAP sensor voltage. Increase vacuum to 20 in. Hg. Read and record MAP sensor voltage. Subtract voltage recorded at 20 in. Hg from voltage recorded at 5 in. Hg.
3. If difference is 2.3-2.9 volts, repair restriction in vacuum hose to MAP sensor. Perform «TEST VER-2»(ref-10881-S18660743652000111000000) . If voltage difference is not 2.3-2.9 volts, replace MAP sensor. Perform TEST VER-2.