Circuit Description
An ignition 1 voltage is supplied to the intake manifold tuning (IMT) valve solenoid through a main relay and a fuse when the ignition key is turned ON. The control module controls the IMT solenoid by grounding the control circuit via an internal driver switch. The primary function of the driver is to supply ground for the controlled component. The control module monitors the status of the driver. If the engine control module (ECM) detects an incorrect voltage for the commanded state of the driver, this DTC sets.
DTC Descriptors
This diagnostic procedure supports the following DTC:
DTC P1182 Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit High Voltage
Conditions for Running the DTC
| • | The ignition is ON. |
| • | DTC P1182 runs continuously once the above conditions are met. |
Conditions for Setting the DTC
The ECM detects a short to voltage on the control circuit of the IMT valve solenoid.
Action Taken When the DTC Sets
| • | The malfunction indicator lamp (MIL) will illuminate. |
| • | The ECM will record operating conditions at the time the diagnostic fails. The information will be stored in the Freeze Frame and Failure Records buffers. |
Conditions for Clearing the MIL/DTC
| • | The MIL will turn OFF after 4 consecutive ignition cycles in which the diagnostic runs without a fault. |
| • | DTCs can be cleared by using the scan tool. |
| • | Disconnect the ECM battery feed for 10 seconds. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
A click should be heard or felt when the valve operates. Ensure that both the ON and the OFF states are commanded. Repeat the commands as necessary.
-
This step verifies that the ECM is providing ground to the IMT solenoid.
Step | Action | 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 - Engine Controls? | Go to Step 2 | |
Do you hear or feel a click from the IMT solenoid when the valve is commanded ON and OFF? | Go to Step 3 | Go to Step 4 | |
3 |
Did the DTC fail this ignition? | Go to Step 4 | Go to Intermittent Conditions |
Does the test lamp turn ON and OFF with each command? | Go to Step 6 | Go to Step 5 | |
5 | Test the control circuit of the IMT solenoid for a short to voltage. Refer to Testing for a Short to Voltage and Wiring Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
6 | Test for shorted terminals and for a poor connection at the IMT solenoid . Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
7 | Test for shorted terminals and for a poor connection 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 10 | Go to Step 9 |
8 | Replace the IMT solenoid. Refer to Intake Manifold Tuning Valve Actuator Solenoid Replacement . Did you complete the replacement? | Go to Step 10 | -- |
9 | Replace the ECM. Refer to Engine Control Module Replacement . Did you complete the replacement? | Go to Step 10 | -- |
10 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 11 |
11 | Are there any DTCs that have not been diagnosed? | System OK | |
