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A/C Poor Performance (07-005/04)

WARNING: This page is about the 3 i, Automatic, which is a different variant/trim than selected.
Publication date: 1970-01-01
Reference number: 07-005/04

A/C POOR PERFORMANCE

A/C POOR PERFORMANCE

TECHNICAL SERVICE BULLETIN

Reference Number(s): 07-005/04
MAZDA: 2004 Mazda3
SECTION: HVAC

APPLICABLE MODEL(S)/VINS

2004 Mazda3

DESCRIPTION

Some vehicles may exhibit A/C poor performance where the vent temperatures remain too warm for customers. The A/C system is also found to be working properly with the proper refrigerant charge and correct adjustment of the air mix, fresh, and mode controls.

The cause may be due to uneven airflow across the evaporator core, creating inefficient cooling.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

  1. Make sure the A/C system is determined to be operating correctly.
    • If the A/C system is working properly according to Workshop Manual specifications (section 07-10 REFRIGERANT SYSTEM PERFORMANCE TEST), proceed to Step 2.
    • If the A/C system is not working properly, proceed with appropriate diagnostics according to Workshop Manual (section 07-03 TROUBLESHOOTING INDEX).
  2. Record radio preset stations.
  3. Set ignition to LOCK position.
  4. Disconnect the battery negative cable for 1 min or more.
  5. Remove side wall on passenger side foot well.
    Fig 1: Removing Passenger-Side Side Wall
    G00424492
  6. Remove Passenger Junction Box (PJB) according to Workshop Manual (section 09-40 PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION).
    NOTE: PJB module configuration does not need to be performed since the same module will be used.
  7. Remove metal bracket.
    Fig 2: Removing Metal Bracket
    G00424493
  8. Disconnect evaporator temperature sensor connector.
    Fig 3: Evaporator Temperature Sensor Location
    G00424494
  9. Remove evaporator access cover from A/C unit.
    NOTE: Be sure that gray seal remains seated in groove and does not come off.
    Fig 4: Removing Evaporator Access Cover
    G00424495
  10. Install diffuser plates.
    NOTE: Be sure to position the plates properly.
    Fig 5: Diffuser Plates
    G00424496
    1. Install top plate first then push up.
      Fig 6: Installing Top Diffuser Plate
      G00424497
    2. Install bottom plate.
      Fig 7: Installing Bottom Diffuser Plate
      G00424498
    Fig 8: Appearance w/Both Diffuser Plates Installed
    G00424499
    Fig 9: Proper Positioning of Arrows
    G00424500
  11. Reassemble in reverse order.
  12. Reconnect negative battery cable.
  13. Reprogram radio preset stations and clock.
  14. Verify repair.

PART(S) INFORMATION

PART(S) INFORMATION

Part Number Description Qty.
BN8P-61-J6X Filter set 1

WARRANTY INFORMATION

NOTE:
  • This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair. Refer to the SRT microfiche for warranty term information.
  • Additional diagnostic time cannot be claimed for this repair.

Warranty Type: A

Symptom Code: 60

Damage Code: 9J

Part Number Main Cause: BN8P-61-J6X

Quantity: 1

Operation Number / Labor Hours:

  1. XX728XRX / 0.4 (does not include A/C Refrigerant System Performance Test)
  2. U0001XDX / 1.0 (A/C Refrigerant System Performance Test)
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