Circuit Description
The engine control module (ECM) controls the throttle valve by applying a varying voltage to the throttle actuator control motor. The ECM monitors the actual throttle valve position using throttle position (TP) sensor 1 and 2. If the ECM detects the throttle valve did not return to the rest position within a calibrated time, this DTC sets.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P2119 Throttle Closed Position Performance
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The vehicle speed is 0 km/h (0 mph). |
| • | The engine speed is less than 40 RPM. |
| • | The engine coolant temperature (ECT) is 5-60°C (41-140°F). |
| • | The intake air temperature (IAT) is 5-60°C (41-140°F). |
| • | The ignition 1 voltage is more than 10 volts. |
| • | The accelerator pedal position (APP) is less than 15 percent. |
| • | DTC P2119 runs once per ignition cycle when the above conditions are met for more than 1 second. |
Conditions for Setting the DTC
The ECM determines that the throttle valve did not return to the rest position within 720 milliseconds.
Action Taken When the DTC Sets
| • | The control module stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records. |
| • | The driver information center, if equipped, may display a message. |
Conditions for Clearing the DTC
| • | 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 non-emission related diagnostic. |
| • | Clear the DTC with a scan tool. |
Diagnostic Aids
| • | Use the J 35616 Connector Test Adapter Kit for any test that requires probing the ECM harness connector or a component harness connector. |
| • | Inspect for a condition in which the throttle valve may have been held open. For example, ice may have formed in the throttle bore causing the throttle valve not to close. Observe the Freeze Frame/Failure Records. |
| • | The throttle valve is spring loaded to a slightly open position. The throttle valve should be open approximately 18-24 percent. This is referred to as the rest position. |
| • | The throttle valve should not be completely closed or open any more than a specified amount. |
| • | The throttle valve should move open and to the closed position without binding under the normal spring pressure. |
| • | The throttle should NOT be free to move open or closed WITHOUT spring pressure. |
| • | The scan tool has the ability to operate the throttle control system using the TP function located in the TAC System menu. This function operates the throttle valve through the entire range in order to determine if the throttle actuator control (TAC) system operates correctly. |
| • | For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections . |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step determines if the condition exists. A TP sensor DTC may cause this DTC to set.
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Depending on the condition, DTC P1516, P2101, P2119, P2135, P2176 may set individually or together.
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When the ignition is turned ON, the ECM operates the throttle actuator control motor to verify the integrity of the system prior to start-up. This can be seen by the momentary flash of the test lamp as the ignition is turned ON.
Step | Action | Values | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module Connector End Views or Engine Controls Connector End Views | ||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||
Did DTC P0120, P0121, P0122, P0123, P0220, P0222, or P0223 fail this ignition? | -- | Go to Step 3 | ||||||
Did DTC P1516, P2101, P2119, P2135, and/or P2176 fail this ignition? | -- | Go to Step 5 | Go to Step 4 | |||||
4 |
Did the DTC fail this ignition? | -- | Go to Step 5 | Go to Diagnostic Aids | ||||
5 |
Is the voltage within the specified range? | 3.5-4 V | Go to Step 6 | Go to DTC P0121 | ||||
6 | Observe the TP sensor 2 voltage parameter with a scan tool. Is the voltage within the specified range? | 1.1-1.5 V | Go to Step 7 | Go to DTC P0121 | ||||
7 |
Notice: DO NOT use any mechanical device such as pliers or screwdrivers to disengage the connector. In order to prevent damage to the connector or harness wiring, both of the latches on the connector must be depressed with finger pressure only. When the latches are depressed the connector must then be pulled straight back without pulling on the wires in order to disengage. Failure to follow this procedure can lead to connector or wiring harness damage and failure. Important: Disconnecting the throttle body harness connector causes additional DTCs to set. Is the voltage less than the specified value for both circuits? | 1 V | Go to Step 8 | Go to Step 9 | ||||
Important: The test lamp intensity should be bright. Compare to another vehicle. Does the test lamp turn ON and then OFF each time the ignition is cycled? | -- | Go to Step 12 | Go to Step 11 | |||||
9 | Is the voltage more than the specified value? | 1 V | Go to Step 14 | Go to Step 10 | ||||
10 | Test the TAC motor control circuit that measured below the specified value for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 13 | ||||
11 |
Is there continuity? | -- | Go to Step 15 | Go to Step 13 | ||||
12 | Test for shorted terminals and for poor connections at the throttle body connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 16 | ||||
13 | Test for shorted terminals and for poor connections at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 17 | ||||
14 | Repair the appropriate TAC motor control circuit for a short to voltage. Refer to Wiring Repairs . Did you complete the repair? | -- | Go to Step 18 | -- | ||||
15 | Repair the short between the TAC motor control circuits 1 and 2. Refer to Wiring Repairs . Did you complete the repair? | -- | Go to Step 18 | -- | ||||
16 | Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- | ||||
17 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 18 | -- | ||||
18 |
Did the DTC fail this ignition? | -- | Go to Step 2 | Go to Step 19 | ||||
19 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | -- | System OK | |||||
