9-7X V8-5.3L (2005)
‹› If the Cruise Control Resume/Accel. Switch parameter displays On, test the cruise control resume/accel. switch signal circuit for a short to
voltage. If the circuit tests normal, replace the ECM.
7. Connect a 3-amp fused jumper between terminals A and C of the turn signal multifunction switch harness connector X4. Verify the Cruise Control
Resume/Accel. Switch parameter displays On.
‹› If the Cruise Resume/Accel. Switch parameter displays Off, test the cruise control resume/accel. switch signal circuit for an open/high
resistance or short to ground. If the circuit tests normal, replace the ECM.
8. Verify the Cruise Control Set/Coast Switch parameter displays Off.
‹› If the Cruise Control Set/Coast Switch parameter displays On, test the cruise control set/coast switch signal circuit for a short to voltage. If the
circuit tests normal, replace the ECM.
9. Connect a 3-amp fused jumper between terminals A and D of the turn signal multifunction switch harness connector X4. Verify the Cruise Control
Set/Coast Switch parameter displays On.
‹› If the Cruise Control Set/Coast Switch parameter displays Off, test the cruise control set/coast switch signal circuit for an open/high resistance
or short to ground. If the circuit tests normal, replace the ECM.
10. If all circuits test normal, replace the cruise control switch.
Component Testing
1. Ignition OFF, disable the SIR system. Refer to SIR Disabling and Enabling (See: Body and Frame/Interior Moulding / Trim/Dashboard /
Instrument Panel/Air Bag(s) Arming and Disarming/Service and Repair).
2. Disconnect the turn signal multifunction switch harness connector X4.
3. Test for infinite resistance between terminals A and B of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
4. Turn the cruise control ON/OFF switch ON. Test for less than 1 ohm between terminals A and B of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
5. Test for infinite resistance between terminals A and D of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
6. Press and hold the set/coast switch. Test for less than 1 ohm between terminals A and D of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
7. Test for infinite resistance between terminals A and C of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
8. Press and hold the resume/accel. switch. Test for less than 1 ohm between terminals A and C of the turn signal multifunction switch.
‹› If not the specified value, replace the turn signal multifunction switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures) after completing the diagnostic procedure.
*
Turn Signal Multifunction Switch Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Turn Signal
Multifunction Switch Replacement)
*
Control Module References (See: Testing and Inspection/Programming and Relearning/Control Module References) for ECM replacement, setup,
and programming
