DTC P0121: TPS VOLTAGE DOES NOT AGREE WITH MAP Jeep Cherokee II рестайлинг

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see CHEROKEE wiring diagram in WIRING DIAGRAMS article.

Note. DTC P0121: TPS VOLTAGE DOES NOT AGREE WITH MAP is monitored with engine running and no Manifold Absolute Pressure (MAP) or Throttle Position (TP) sensor DTCs present. Engine speed must be more than 1600 RPM for all TP sensor testing. Possible causes are: MAP sensor DTC present, erratic TP sensor voltage change, defective connectors or defective wiring.

1. Turn ignition on, with engine off. Wiggle TP sensor connector and wiring harness while monitoring TP sensor voltage. If voltage changes while wiggling connector and wiring harness, repair connector or wiring harness where wiggling caused voltage to change. Perform TEST VER-5A. If voltage does not change, go to next step.
2. Turn ignition off. Using vacuum tee, connect a vacuum gauge into manifold vacuum source. Start engine and allow it to idle. If engine will not idle, maintain a constant RPM above idle. Using scan tool, read MAP sensor vacuum. If vacuum reading is within one in. Hg of teed-in vacuum gauge, go to next step. If vacuum reading is not within one in. Hg of teed-in vacuum, replace MAP sensor. Perform TEST VER-5A. NOTE: If TP sensor connector, 5-volt supply circuit (Orange wire) and sensor ground circuit (Brown/Yellow wire) are switched at TP sensor connector, DTC P0121: TPS VOLTAGE DOES NOT AGREE WITH MAP DTC will set.
3. Turn ignition off. Check throttle plate and linkage for binding. Repair throttle plate and linkage as necessary. Disconnect TP sensor connector. Clean and/or repair connector as necessary. Inspect connector for proper wire installation in appropriate connector terminal. See CONNECTOR IDENTIFICATION. Correct wire installation as necessary. Visually inspect connector for corroded, damaged, pushed-out or miswired terminals. Repair connector as necessary. Perform TEST VER-5A. If wires are properly installed, go to next step.
4. Turn ignition on, with engine off. Ensure throttle linkage is at idle position. Using scan tool, read TP sensor voltage. If voltage is more than one volt, replace TP sensor. Perform TEST VER-5A. If voltage is one volt or less, go to next step. NOTE: Throttle linkage must be moved very slowly while looking for a smooth change in voltage in this step.
5. Ensure ignition is on, with engine off. Slowly open and close throttle plate while monitoring TP sensor voltage. If voltage change is smooth, go to next step. If voltage change is erratic, replace TP sensor. Perform TEST VER-5A.
6. Ensure ignition is on, with engine off. Open throttle plate to wide-open throttle while monitoring TP sensor voltage. If voltage is more than 3.5 volts, go to next step. If voltage is 3.5 volts or less, replace TP sensor. Perform TEST VER-5A.
7. Turn ignition off. Disconnect TP sensor connector. Clean and/or repair connector as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on TP sensor connector, 5-volt supply circuit (Orange wire). If voltage is less than 5 volts, repair open 5-volt supply circuit. Perform TEST VER-5A. If voltage is 5 volts or more, go to next step.
8. At this time, PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.