DTC P0660 (LDD)
Diagnostic Instructions
DTC Descriptor
| DTC P0660 00: Intake Manifold Tuning Control
Valve Control Circuit |
Circuit/System Description
Ignition voltage is supplied directly to the intake manifold
tuning solenoid valve. The engine control module (ECM) controls the
intake manifold tuning solenoid valve by grounding the control
circuit via an internal driver switch. The primary function of the
driver is to supply ground for the intake manifold tuning solenoid
valve. The ECM can determine if the control circuit is open,
shorted to ground, or shorted to a voltage by monitoring the
voltage on the control circuit.
Conditions for Running the DTC
| • |
The engine is
operating. |
| • |
The ignition voltage is
between 7-16 V. |
| • |
DTC P0660 00 runs continuously
once the above condition is met. |
Conditions for Setting the DTC
The ECM detects that the commanded state of the driver and the
actual state of the control circuit do not match for greater than
10 s.
Action Taken When the DTC Sets
DTC P0660 00 is a Type C DTC
Conditions for Clearing the DTC
DTC P0660 00 is a Type C DTC
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Air Intake System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Engine idling, command the
intake manifold tuning solenoid valve ON with a scan tool. The
intake manifold tuning solenoid valve vacuum actuator should move
to the closed position. |
| 2. |
Operate the vehicle within the
conditions for running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the freeze frame/failure records data. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector of the Q22 Intake Manifold Tuning Solenoid
Valve. |
| 2. |
Ignition ON, verify a test
lamp illuminates between the ignition voltage circuit terminal 1
and ground. |
| ⇒ |
If the test lamp does not illuminate, repair the
ignition voltage circuit for a short to ground or an open/high
resistance. Replace the F47 fuse, if necessary. |
| 3. |
Ignition OFF, connect a test
lamp between the control circuit terminal 2 and the ignition
voltage circuit terminal 1. |
| 4. |
Ignition ON, command the
Intake Manifold Tuning Control Valve solenoid Open and Closed with
a scan tool. The test lamp should turn ON when the solenoid is
commanded Closed, and OFF when the solenoid is commanded
Open. |
| ⇒ |
If the test lamp is always ON, test for a short to
ground on the K20 Engine Control Module pin 44 X2 control circuit.
If circuit tests normal, replace the K20 Engine Control
Module. |
| ⇒ |
If the test lamp is always OFF, test for a short
to voltage or an open/high resistance on the K20 Engine Control
Module pin 44 X2 control circuit. If circuit tests normal, replace
the K20 Engine Control Module. |
| 5. |
If all circuits test normal,
test or replace the Q22 Intake Manifold Tuning Solenoid
Valve. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for ECM replacement, setup, and
programming
|
