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US BULLETIN No: F017/97 DATE: 1997
CAN BULLETIN No: N/A
APPLIES TO: 1997 MPV AFFECTED VINs: All
SUBJECT: Incorrect fuel system display
DETAILS:

When inspecting the fuel control system with an NGS tester, the PID information from the NGS tester may be different from the one mentioned in the Workshop Manual due to mis-programming of PCMs. PCM will be modified at the beginning of the 1998 model year.

NOTE: Service manager should place a copy of the bulletin inside the 1997 MPV Workshop Manual and with the NGS tester.

Description NGS Display
Correct Incorrect
Fuel System Feedback Control Status Bank 1 Open or Closed OP DRV
Fuel System Feedback Control Status Bank 2 NA Open or Closed

Explanations:

NGS Display Meaning
NA Not Used
Open Feedback Stops Within the feedback zone, does not meet the requirements for the coolant temperature conditions
Closed Feedback Operating O2 sensor being used for feedback is OK
OP DRV Feedback Stops Outside feedback zone

REPAIR PROCEDURE

  1. Connect the NGS tester to the data link connector 2.
  2. After setting up the NGS tester for the MPV, select "GENERIC OBDII FUNCTIONS" and press the TRIGGER.
  3. Press Number 8 under CONT to continue to GENERIC OBDII FUNCTIONS.
  4. Select "PID/DATA MONITOR" and press the TRIGGER.
  5. Press Number 4 under CLEAR to clear previously selected PID's.
  6. Turn the menu dial clockwise or counter clockwise to highlight FUEL SYS1 and select by pushing the TRIGGER.
  7. Turn the menu dial clockwise or counter-clockwise to highlight FUEL SYS2 and select by pushing the TRIGGER.
  8. Press Number 6 under START to view PIS's.
  9. Verify that FUEL SYS1 indicated Current Feedback Status and FUEL SYS 2 indicates "-NA-". If FUEL SYS 1 indicated "OP DRV and FUEL SYS 2 does not indicates "-NA-", use data from FUEL SYS2 since it is correct.

    Normal PCM display:


    Problem PCM display:
CONSUMER NOTICE:
The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by "do-it-yourselfers." Consumers should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies, consumers should contact their nearest authorized Mazda dealership.
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