Hybrid System - IMA Indicator ON, DTC P0A7F, Low Power
09-025March 8, 2013
Applies To:
2009 Civic Hybrid - ALL
IMA Indicator Is On With DTC P0A7F, or Low-Charged IMA Battery Causes Low Power When Accelerating From a Stop
(Supersedes 09-025, dated February 12, 2013, to revise the information marked by the black bars, or asterisks)
REVISION SUMMARY
*Under Warranty Claim Information, the Failed Part numbers were changed.*
SYMPTOM
The IMA indicator may come on with DTC P0A7F (battery module deterioration), and the vehicle may have low power when accelerating from a stop.
POSSIBLE CAUSE
The IMA battery software misinterprets sensor inputs, causing DTC P0A7F be set, and/or a low-charged IMA battery causes low power when accelerating from a stop.
CORRECTIVE ACTION
If needed, update the IMA battery software and the PGM-FI software. If DTC P0A7F is indicated you may also need to replace the IMA battery.
SOFTWARE INFORMATION
HDS Software Version:
2.017.040 (April 2009) (purple) or later.
Control Module (CM) Update:
Database Update 26-MAR-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 and IMA battery software program IDs and P/Ns are shown below. If these, or later program IDs are the current ones displayed during the update, the software for this service bulletin is already installed.
PARTS INFORMATION
NOTE:
To order an IMA battery, refer to Service Bulletin 10-061, IMA Battery Exchange Program.
IMA Battery:
P/N 1D010-RMX-A02RM
WARRANTY CLAIM INFORMATION
The normal warranty applies.
REPAIR PROCEDURE
1. Check the IMA battery software.
^ If the IMA battery software version is not 1K101-RMX-A11 or later, and the IMA indicator is on, go to step 2.
^ If the IMA battery software version is not 1K101-RMX-A11 or later, the IMA indicator is on, and the customer complaint is low power when accelerating from a stop, go to step 4.
^ If the IMA battery software version is 1K1O1-RMX-A11 or later, and the IMA indicator is on, go to step 3.
^ If the IMA battery software version is 1K101-RMX-A11 or later, the IMA indicator is off, and the customer complaint is low power when accelerating from a stop, this service bulletin does not apply, continue with normal troubleshooting.
2. Clear the DTC, and test-drive the vehicle.
Does DTC P0A7F return?
Yes - Go to step 3.
No - Go to step 4.
3. Replace the IMA battery, then return the vehicle to the customer:
^ Refer to the 2006-2009 Civic Hybrid Service Manual, or
^ Online, enter keywords BAT MOD REM, and select Battery Module Removal/Installation from the list.
4. Update the IMA battery software and the PGM-FI software. Refer to Service Bulletin 01-023, Updating Control Units/Modules.
5. Do the CKP pattern learn procedure with the HDS:
^ In the ADJUSTMENT MENU of the HDS, select CRANK PATTERN.
^ Select CRANK PATTERN LEARNING, and follow the screen prompts.
6. 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 cycle twice).
^ Let the engine idle for 10 minutes.
7. Select START CLUTCH FEEDBACK LEARN, and follow the screen prompts to calibrate the start clutch pressure control.
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