A/C - Compressor Noisy Operation

Classification:
HA94-005

Section:
Air Conditioning

Models:
1994 Q45 (G50)

Reference:
TECHNICAL BULLETIN ITB94-044

Date:
July 28, 1994

1994 Q45, A/C COMPRESSOR NOISY OPERATION

APPLIED MODEL:
1994 Q45 (G50)

APPLIED VIN:
JNKNG01D*RM267896

SERVICE INFORMATION

Some vehicles may exhibit an A/C compressor pumping noise that may be heard under the following conditions:

Just after the A/C is turned "ON" (during idle or driving)

While idling with the A/C "ON" (After driving)

The noise is transmitted through the A/C low pressure pipe at the dash panel and through the evaporator.

If a customer complains of an A/C compressor pumping noise during the conditions mentioned above, perform the following service procedure.

SERVICE PROCEDURE





1) Check the A/C low pressure pipe at the dash panel. It should be located at the center of the grommet. (Fig. A) Reposition the A/C low pressure pipe if necessary.

2) Check the A/C pipes in the cooling unit. Do the pipes interfere with the cooling unit? (Fig. B). Reposition the A/C pipes in the cooling unit if necessary.

Confirm if incident is corrected. If the compressor pumping noise is still present, perform the following:

3) Check the high side pressure of the compressor (outlet) when the incident is occurring during idle. If the pressure is less than 10 kg/sq.cm (142 psi), replace the thermal expansion valve and the high pressure pipe inside the case with the countermeasure parts listed under Parts Information.





PARTS INFORMATION





WARRANTY INFORMATION