Cobalt L4-2.2L (2008)
Conditions for Clearing the DTC
*
The DTC becomes history when the fault is no longer present.
*
A history DTC clears after 100 malfunction-free ignition cycles.
*
The BCM receives a clear code command from the scan tool.
Circuit/System Verification
Important:
*
Electromagnetic interference (EMI) on the speed sensor signal circuit may cause erratic cruise control operation.
*
Inspect for proper operation of the clutch pedal position (CPP) sensor. Do not perform this diagnostic if DTC P0806, P0807, P0808 or
P080A are stored in the ECM. Refer to DTC P0806, DTC P0807 or P0808, DTC P080A (MU3) or DTC P0806, DTC P0807 or P0808,
DTC P080A (Getrag 5 Speed) if this DTC is set in the ECM as current or history. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/P Code Charts/P0806
Engine ON, while rotating the steering wheel to both steering stops, observe the scan tool Cruise Control Switch parameter while pressing each of the
cruise control switches. The parameter should toggle between On, Off, Resume and Set as the applicable switch is pressed.
Circuit/System Testing
Important: Repair any brake system related symptoms and DTCs before performing this diagnostic.
1. Ignition OFF, remove the inflatable restraint steering wheel module.
2. Disconnect the harness connector at the steering wheel controls switch - left.
3. Ignition ON, test for greater than 10 volts between the supply voltage circuit terminal 5 (UK3)/3 (non UK3) and ground.
‹› If less than the specified range, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the BCM.
4. Ignition OFF, connect the harness connector at the steering wheel controls switch - left.
5. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - right.
6. Ignition ON, cruise switch ON, test for greater than 10 volts between the supply voltage circuit terminal 6 (UK3)/3 (non UK3) and ground.
‹› If less than the specified range, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or
replace the steering wheel controls - left.
7. Verify the scan tool Cruise Control Switch parameter is OFF.
‹› If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the BCM.
8. Ignition OFF, connect the harness connector at the steering wheel controls switch - right.
9. Ignition ON, cruise switch ON, observe the scan tool Cruise Control Switch parameter. The parameter should display ON.
‹› If not the specified value, test the signal circuit terminal 7 (UK3)/4 (non UK3) for a short to ground, a short to voltage or an open/high
resistance. If the circuit tests normal, test or replace the steering wheel controls switch - right.
10. Observe the scan tool Cruise Control Switch parameter while pressing the RES + portion of the cruise control switch. The parameter should
display Resume.
‹› If not the specified value, test or replace the steering wheel controls switch - right.
11. Observe the scan tool Cruise Control Switch parameter while pressing the SET - portion of the cruise control switch. The parameter should display
Set.
‹› If not the specified value, test or replace the steering wheel controls switch - right.
12. If the circuits test normal, test or replace the ECM.
Component Testing
1. Ignition OFF, remove the inflatable restraint steering wheel module.
2. Ignition OFF, disconnect the harness connector at the steering wheel controls - left and the steering wheel controls - right.
3. Measure the resistance between terminals 5 (UK3)/3 (non UK3) and 6 at the steering wheel controls - left. Then measure the resistance between
terminals 7 (UK3)/4 (non UK3) and 6 (UK3)/3 (non UK3) at the steering wheel controls - right. Individually activate and hold each cruise control
