:  Dec 17, 2007



Overview

There are 2 accessory drive belts on the supercharged engine and this section covers basic checks for both.

For ease of identification, the 2 belts are referred to as primary and secondary drive belts.

For additional information on the description and operation of the system, refer to the relevant workshop manual section.

Inspection and Verification

. Verify the customer concern.

. Visually inspect for obvious mechanical faults.

Mechanical
  • Primary drive belt condition (cracking/damage/contamination)
  • Secondary drive belt condition (cracking/damage/contamination)
  • Belt tension
  • Pulley alignment
  • Coolant pump
  • Primary tensioner assembly
  • Air conditioning compressor
  • Power steering pump
  • Crankshaft pulley
  • Generator
  • Dynamic response pump pulley
  • Deflection pulley
  • Supercharger pulley
  • Secondary tensioner assembly
  • Cooling fan pulley

. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

  : If the engine is run without the accessory drive belts connected to eliminate driven components, diagnostic trouble codes, (DTCs) may be set which must be cleared before the vehicle is returned to the owner. The engine should not be run for more than 2-3 minutes with the belts disconnected. Failure to follow this instruction may result in damage to the vehicle.

. Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom chart or DTC index.
  Make sure that all DTCs are cleared following rectification.
Make sure that all DTCs are cleared following rectification.

Symptom chart

Symptom Possible cause Action
Noise
  • Belt condition
  • Belt tension
  • Pulleys misaligned
  • Driven components (including tensioners)
Check the belt condition (see visual inspection). Check the tensioner function. Check the pulley alignment. Check the driven components for excessive resistance to rotation. Rectify as necessary.
Drive belt does not hold tension
  • Belt condition
  • Tensioner fault
Check the belt condition (see visual inspection). Check the tensioner function. Rectify as necessary.

DTC index

:
  Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

:
  For a full list of ECM DTCs, refer to workshop manual section 303-14 - Electronic Engine Controls.

DTC Description Possible source Action
P050600 Idle Air Control System RPM Lower Than Expected
  • Air intake restriction
  • Accessory drive overload (defective/seized component)
Check the air intake system. Check the accessory drive belt and components. Refer to the relevant workshop manual section.