Pinpoint Test C: Idle Boom/Shake/Vibration/Shudder
- C1 CHECK CABLE/HOSES
- Check the engine compartment for any component that may have a touch condition between the engine and body or chassis. For example: control cable, air conditioning (A/C) hoses, and acceleration cable.
- Are the engine compartment components OK?
- Yes
: GO to 2.
- No
: CORRECT the condition. REPEAT the Road Test as outlined.
- C2 CHECK THE ENGINE COOLING RADIATOR
- Check the engine cooling radiator mountings and bushings for security and condition. Check the radiator installation for any component that may have a touch condition.
- Is the engine cooling radiator installation and bushings OK?
- Yes
: GO to 3.
- No
: REPAIR or INSTALL new components as necessary. REPEAT the Road Test as outlined.
- C3 CHECK THE EXHAUST SYSTEM
- Check the exhaust system mounts.
- Are the exhaust system mounts OK?
- Yes
: GO to 4.
- No
: INSTALL new mounts as necessary. REPEAT the Road Test as outlined.
- C4 CHECK THE POWERTRAIN/DRIVETRAIN MOUNTS
- Visually check the hydraulic powertrain/drivetrain mounts for leaks and condition.
- Are the powertrain/drivetrain mounts OK?
- Yes
: GO to 5.
- No
: INSTALL new mounts as necessary. REPEAT the Road Test as outlined.
- C5 CHECK THE POWERTRAIN/DRIVETRAIN MOUNT NEUTRALIZATION
- Carry out the POWERTRAIN/DRIVETRAIN MOUNT NEUTRALIZING procedure.
- Is the boom/shake/vibration/shudder OK?
- Yes
: Vehicle condition corrected. REPEAT the Road Test as outlined.
- No
: VERIFY the customer concern.