DTC P1585 Cruise Control Inhibit Output Circuit. Oldsmobile Intrigue 2000

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 2000 🢒 Intrigue 🢒 Engine 🢒 Engine Controls - 3.5L 🢒 DTC P1585 Cruise Control Inhibit Output Circuit

Refer to Engine Control Schematic

Cruise Control Module, EBCM and VSS

Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Component Views
Powertrain Control Module Description
Heater- A/C Control and A/C Compressor Clutch Coil
MAF, Secondary Air Injection Pump Bypass Solenoid, IAC and Secondary AIR Pump
OBD II Symbol Description Notice
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Circuit Description

The cruise control module pulls the Cruise Inhibit circuit up to approximately 12 volts. When the powertrain control module (PCM) determines that cruise control is allowed, the PCM grounds the Cruise Inhibit circuit. The cruise control module detects the low voltage signal and enables the system. The PCM grounds the cruise inhibit circuit via 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 PCM. If the fault detection circuit senses a voltage other than what is expected, this DTC will set.

Conditions for Running the DTC

•	The ignition voltage is between 9-18 volts.

•	The engine speed is more than 80 RPM.

•	The PCM driver transitions from ON to OFF or from OFF to ON.

Conditions for Setting the DTC

•	A short to ground, an open circuit, or a short to battery voltage is detected on the control circuit.

•	The condition is present for at least 30 seconds.

Action Taken When the DTC Sets

•	The powertrain control module (PCM) stores the DTC information into memory when the diagnostic runs and fails.

•	The malfunction indicator lamp (MIL) will not illuminate.

•	The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.

Conditions for Clearing the MIL/DTC

•	A History DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.

•	The current DTC will clear when the diagnostic runs and does not fail.

•	Use a scan tool in order to clear the MIL diagnostic trouble code.

•	Interrupting the PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Powertrain Control Module Description , Clearing Diagnostic Trouble Codes.

Diagnostic Aids

Notice: Use the connector test adapter kit J 35616-A for any test that requires probing the following items:

•	The PCM harness connectors

•	The electrical center fuse/relay cavities

•	The component terminals

•	The component harness connector

Using this kit will prevent damage caused by the improper probing of connector terminals.

Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

If the problem is intermittent, refer to Intermittent Conditions .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

Ignition feed voltage should normally be present on the control circuit with the PCM disconnected and the ignition turned ON.

Checks for a shorted component or a short to B+ on the control circuit. Either condition results in a measured current of over 500 milliamps. Also checks for a component that is going open while being operated, resulting in a measured current of 0 milliamps.

Checks for a short to voltage on the control circuit.

This vehicle is equipped with a PCM which utilizes an electrically erasable programmable read-only memory (EEPROM). If the PCM is replaced, the new PCM must be programmed.

Step

Action

Value(s)

Yes

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Turn the key to Off.
Disconnect the PCM.
Turn the key to On.
Using a digital multimeter (DMM) , measure the voltage between the cruise inhibit control circuit and ground at the PCM harness connector .

Is the voltage near the specified value?

B+

Go to Step 3

Go to Step 6

Use the DMM to measure the current between the cruise inhibit control circuit and ground at the PCM harness connector .
Monitor the current reading on the DMM for at least 2 minutes.

Does the current reading remain within the specified range?

0.001 - 0.5 amp

Go to Step 11

Go to Step 4

Turn the key to Off.
Disconnect the stepper motor cruise control (SMCC) module and leave the PCM disconnected.
Turn the key to On.
Using the DMM , measure voltage between the cruise inhibit control circuit and ground.

Does the voltage equal the specified value?

0 V

Go to Step 10

Go to Step 5

Locate and repair a short to voltage in the cruise inhibit control circuit. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

Go to Step 16

Check the ignition feed fuse for the SMCC module.

Is the fuse open?

Go to Step 7

Go to Step 8

Check for a short to ground in the ignition feed circuit of the SMCC module.
Replace the fuse.

Was a problem found and corrected?

Go to Step 16

Go to Step 14

Disconnect the SMCC module.
Turn the key to On.
Measure the voltage between the ignition feed circuit of the SMCC module and ground.

Is the voltage near the specified value?

B+

Go to Step 9

Go to Step 13

Check the cruise inhibit control circuit for an open or a short to ground.
If a problem is found, repair the cruise inhibit control circuit. Refer to Wiring Repairs in Wiring Systems.

Was a problem found and corrected?

Go to Step 16

Go to Step 10

Check for the following conditions:

•	A poor connection of the cruise inhibit control circuit at the PCM.

•	A poor connection of the cruise inhibit control circuit at the SMCC module.

•	A poor connection of the SMCC module ignition feed circuit at the SMCC module.

If a problem is found, replace any loose terminals as necessary. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Was a problem found and corrected?

Go to Step 16

Go to Step 14

Turn the key to Off.
Reconnect the PCM.
Disconnect the SMCC module.
Turn the key to On.
Connect a test lamp between the cruise inhibit control circuit and the ignition feed circuit at the SMCC module harness connector. Refer to Cruise Control Schematics .
Using the scan tool outputs test function, cycle the cruise inhibit output ON and OFF.

Does the test lamp flash ON and OFF?

Go to Diagnostic Aids

Go to Step 12

Check the cruise inhibit control circuit for a poor connection at the PCM.
If a problem is found, replace any loose terminals. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Was a problem found and corrected?

Go to Step 16

Go to Step 15

Locate and repair an open in the ignition feed circuit to the SMCC module.

Is the action complete?

Go to Step 16

Replace the SMCC module. Refer to Cruise Control Module Replacement in Cruise Control.

Is the action complete?

Go to Step 16

Important:: The replacement PCM must be programmed.

Replace the PCM. Refer to Powertrain Control Module Replacement/Programming .

Is the action complete?