Steering Control Module (SCM)

P1593-SPEED CONTROL SWITCH 1/2 STUCK





For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

- When Monitored:
Continuously with the ignition on.

- Set Condition:
The Steering Control Module detects that the Speed Control Switch signal voltage is not plausible.





1. DTC IS ACTIVE

NOTE: Diagnose and repair any system voltage DTCs before proceeding with this test.

NOTE: Diagnose and repair any communication DTCs between the Steering Control Module (SCM) and the Powertrain Control Module before proceeding with this test.

NOTE: It may be necessary to test drive the vehicle and operate the speed control in order for this DTC to set.

1. Turn the ignition on.
2. With a scan tool, read SCM DTCs.

Is this DTC active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform the BODY VERIFICATION TEST Body Verification Test.

2. SPEED CONTROL SWITCH
1. Turn the ignition off.
2. Replace the Speed Control Switch.
3. Turn the ignition on.
4. Move the Speed Control Switch to each position several times.
5. With the scan tool, clear DTCs.
6. Move the Speed Control Switch to each position several times while monitoring related data on the scan tool.

NOTE: It may be necessary to test drive the vehicle and operate the speed control in order for this DTC to set.

7. With a scan tool, read SCM DTCs.

Is this DTC active?

Yes

- Go To 3

No

- Test Complete.

3. STEERING CONTROL MODULE (SCM)
1. Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Search for any Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Replace the Steering Control Module (SCM).
- Perform the BODY VERIFICATION TEST Body Verification Test.