Engine Controls - Popping Noise On Light Acceleration

09-069

July 21, 2011

Applies To:
2006-07 Accord Hybrid - ALL

Popping Noise During Light Acceleration
(Supersedes 09-069, dated September 9, 2009, to update the information marked by asterisks)

REVISION SUMMARY

*Under WARRANTY CLAIM INFORMATION, the flat rate time was changed because the MVCI updates control modules more efficiently.*

SYMPTOM

A popping noise similar to a backfire is heard in the intake system at low speeds and light throttle.

PROBABLE CAUSE

As the variable cylinder management (VCM) system reactivates cylinders, compressed air built up in the cylinder is released back into the intake manifold producing a "pop."

CORRECTIVE ACTION

Update the PGM-FI software.

SOFTWARE INFORMATION

HDS Software Version:
2.018.016 July 2009 (white) or later

Control Module (CM) Update:

Application Version V6.17.08 or later
Database Update 24-JUN-2009 or later

To avoid an incorrect repair that would not be covered under warranty, use the software version listed above or a later version.





The updated PGM-FI software program ID and P/N is shown. If this, or a later program ID is the current one displayed during the update, the software for this service bulletin is already installed.

WARRANTY CLAIM INFORMATION

In warranty:
The normal warranty applies.

Operation Number: 125517

*Flat Rate Time: 0.2 hour*

Failed Part: P/N 37820-RCJ-A66

Defect Code: 07201

Symptom Code: 03237

Template ID: 09-069A

Skill Level: Repair Technician

REPAIR PROCEDURE

1. Update the PGM-FI software with the HDS. Refer to Service Bulletin 01-023, Updating Control Units/ Modules.

2. Do the idle learn procedure:

^ Make sure all electrical accessories (A/C, radio, lights, etc.) are off.

^ Start the engine, and let it run until it reaches normal operating temperature (the cooling fans have cycled twice).

^ Let the engine idle for 10 minutes.

3. Use the HDS to clear all DTCs from all systems.





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