P1113

Schematic:

CIRCUIT DESCRIPTION
The intake resonance switchover solenoid is powered by switched battery voltage from the engine controls power relay. The solenoid is activated by a control circuit from the ECM. The ECM controls the solenoid by grounding the control circuit with an internal solid state device called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which is monitored by the ECM. When the ECM is commanding a component ON, the voltage of the control circuit should be low, near 0 volts. When the ECM is commanding the control circuit to a component OFF, the voltage potential of the circuit should be high, near the battery voltage. If the fault detection circuit senses a voltage other than what is expected, a Diagnostic Trouble Code (DTC) will set.

CONDITIONS FOR RUNNING THE DTC
^ The ignition voltage is between 7.5 volts and 15 volts.
^ The engine speed is more than 40 RPM.

CONDITIONS FOR SETTING THE DTC
A short to ground, an open circuit, or a short to battery voltage is detected on the control circuit.

ACTION TAKEN WHEN THE DTC SETS
The ECM will not illuminate the Malfunction Indicator Lamp (MIL).

CONDITIONS FOR CLEARING THE MIL/DTC
^ The DTC clears after forty consecutive warm-up cycles if no failures report by this diagnostic or any other non-emission related diagnostic.
^ The scan tool clears the MIL/DTC.

DIAGNOSTIC AIDS
Use the J 35616-A connector test adapter kit for any test that requires probing the ECM harness connector or a component harness connector.

Check for the following conditions:
^ Poor connections at the ECM or at the component-Inspect the harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. Refer to Testing for Intermittent and Poor Connections in Diagrams for the proper procedure.
^ Misrouted harness-Inspect the harness in order to ensure that the harness is not routed too close to any high voltage wires such as spark plug leads, or too close to any high current devices such as the alternator, the motors, the solenoids, etc.
^ Damaged harness-Inspect the wiring harness for any damage. If the harness appears to be OK, observe the scan tool while moving the related connectors and the wiring harnesses. A change in the display may help in order to locate the fault.

Refer to Intermittent Conditions for the Intermittents.

TEST DESCRIPTION

Steps 1 - 9:

Steps 10 - 19:

The numbers below refer to the step numbers on the diagnostic table.
2. Listen for an audible click when the solenoid operates. Repeat the commands as necessary.
3. This test can detect a partially shorted coil which would cause an excessive current flow. Leaving the circuit energized for 2 minutes allows the coil to warm up. When the coil becomes warm the coil may open causing the amps to drop to 0, or short causing the amps to go above 0.75.