DTC P0660 - LDE
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 Inlet 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
- 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.
- 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
- Ignition OFF, disconnect the harness connector of the
Q22 Intake Manifold Tuning Solenoid Valve.
- Ignition ON, verify a test lamp illuminates between
the ignition voltage circuit terminal 2 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. |
- Ignition OFF, connect a test lamp between the control
circuit terminal 1 and the ignition voltage circuit
terminal 2.
- 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
terminal 44 X2 control circuit. If the 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 terminal 44 X2 control circuit. If the
circuit tests normal, replace the K20 Engine Control
Module. |
- 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
program
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