Вот так, может понятнее будет. Тоже самое, но из другого Мануала
DTC P1512: THROTTLE POSITION SENSOR MINIMUM LEARN FAULT
Circuit Description
The Engine Control Module (ECM) determines the minimum throttle position each time the ignition is turned
on. In order to learn this position, the ECM moves the throttle plate to the closed position. If the ECM
determines the throttle plate is not moving to the fully closed position during this learn procedure, DTC P1512
will set.
Conditions For Running DTC
? Ignition is on.
? Ignition voltage is greater than 5.25 volts.
NOTE: To locate components, see COMPONENT LOCATIONS . For circuit reference,
see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in
ELECTRICAL. For connector terminal identification, see CONNECTOR
IDENTIFICATION .
Conditions For Setting DTC
ECM detects that the throttle plate did not return to the minimum position during learn procedure.
Action Taken When DTC Sets
? The control module illuminates the Malfunction Indicator Light (MIL) when the diagnostic runs and fails.
? The control module records the operating conditions at the time the diagnostic fails. The control module
stores this information in the Freeze Frame and/or the Failure Records.
? The control module commands the TAC system to operate in the Reduced Engine Power mode.
? Under certain conditions the control module commands the engine OFF.
? The message center displays Reduced Engine Power.
Conditions For Clearing MIL/DTC
? The control module turns off the Malfunction Indicator Light (MIL) after 3 consecutive ignition cycles
that the diagnostic runs and does not fail.
? A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
? A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other
emission related diagnostic.
? Clear MIL and DTC with scan tool.
Diagnostic Procedures
1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE
CONTROLS under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine
controls, go to next step.
2. Are DTCs P1120 and P1220 also set? If yes, go to DTC P1120: THROTTLE POSITION SENSOR
NO. 1 CIRCUIT and DTC P1220: THROTTLE POSITION SENSOR NO. 2 CIRCUIT . If no, go to
next step.
3. Observe the Freeze Frame/Failure Records for this DTC. Turn ignition off for 90 seconds. Turn ignition
on, with engine off. Operate the vehicle within the conditions for running the DTC. See CONDITIONS
FOR RUNNING DTC . You may also operate the vehicle within the conditions you observed from the
Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to next step. If no, problem is
intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE
article.
4. Remove the throttle body assembly. Did you find any obstructions preventing the throttle plate from
returning to the minimum position? If no, go to step 6 . If yes, go to next step.
5. Remove the obstruction. After repairs, go to step 7 .
6. Replace the throttle body assembly. After replacing throttle body assembly, go to next step.
7. Clear the DTCs with a scan tool. Turn ignition off for 90 seconds. Turn ignition on, with engine off.
Operate the vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING
DTC . You may also operate the vehicle within the conditions that you observed from the Freeze
Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step 2 . If no, go to next step.
8. With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that
you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system
is okay.
Diagnostic Aids
Inspect for mechanical conditions or binding that may be temperature related. Components may not move freely
in extreme heat or cold due to the presence of contaminants or ice formation.
Author
Topic: Последствия диагностики. (Read 2251 times)