2008 Camry Hybrid Running only on ICE

Jordan Technician Nevada Posted   Latest  
Resolved
Driveability
2008 Toyota Camry Hybrid 2.4L (B 2AZ-FXE) (P311) — 4T1BB46K18U050540
Running On Ice Only

I am hoping you all can help one more time this week. My work order initially said "Client thinks his hybrid battery is bad". After talking with the owner of the vehicle more his real issue is the ICE runs all the time and the does not run off the hybrid battery like it used. His fuel economy has been greatly reduced as a result. He has owned the vehicle for 10 years and has religiously clocked his MPG. His daughter recently started driving the vehicle and that seems to be when this started. I verified that when the Ready On is pushed the vehicle starts in Hybrid mode for about 10 seconds and then the ICE starts up and doesn't shut back down until the vehicle is turned off. There are no faults in car other than the solar sensor faults in the HVAC. The center display unit is frozen on the "Please insert a DVD screen" which seems unrelated. The 12 volt battery is still a Panasonic Toyota battery, so it is possibly the original one. It is marginal on the battery tester. I'm wondering what inputs could keep the vehicle from turning the ICE off. Could a marginal 12 volt battery be a cause of this? The knee jerk reaction is to say the 16 year daughter is doing something differently, but I don't know what that might be. Thanks in advance. 

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Interesting
Dmitriy Analyst
Ontario
Dmitriy Default
 

- Electrical loads such as a heater may keep the engine on; - One surprising “input” may be a shopping bag in the hybrid battery vent, blocking it. In a Prius that vent is by the backseat, not sure where it is in a Camry.

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Paul Instructor
Oregon
Paul Default
   

Are the Screenshots Taken in Key-on, Engine off? (Foot foot brake pedal) And can you post HV Battery SOC and Relative Delta valves please? Does the DC/DC Converter show [Actual} voltage increase when ICE is operating? 14.29v Target

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Jordan Technician
Nevada
Jordan Default
 

Yes the screenshots are KOEO (pushed Ready On without foot on the brake pedal). I will get SOC and values shortly.

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Jordan Technician
Nevada
Jordan Default
 

Here is the rest of the data. State of Charge is at 52%. I did not see the relative delta values, unless I missed them. Would they be somewhere else?

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Matt Technician
Massachusetts
Matt Default
 

The delta state of charge is 0% which is good.

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Paul Instructor
Oregon
Paul Default
   

I Agree with Matt, 0% is Good on DSC.

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Matt Technician
Massachusetts
Matt Default
 

I agree with Dimitry, make sure all electrical loads are off (air conditioning, blower fan, high beams, rear defroster) and let the vehicle idle. When the HV battery state of charge gets high enough the ICE should shut down. The difference between the highest and lowers V-block on the screen shot you posted is about 270-mV which is not that bad. But the vehicle should be taken out and driven…

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Jordan Technician
Nevada
Jordan Default
 

Typically he gets 35-40 mpg, he is now getting half that and it was even worse on the last tank of gas

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George Diagnostician
British Columbia
George Default
 

Hi Jordan I think time is up on the high voltage battery it's not holding a charge brake torque the vehicle in reverse try not to let ice start which will be a little difficult in your situation while monitoring batt block values the key is to test under load

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Anthony Technical Support Specialist
Pennsylvania
Anthony Default
 

Hi Jordan: Half of the internet is down here at the moment. What are the reflashes on the ECM and Hybrid Controls? Guido

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Geoff Diagnostician
Hawaii
Geoff Default
 

"Half of the internet is down here at the moment." Which half Guido, the 1's or the 0's ?

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Anthony Technical Support Specialist
Pennsylvania
Anthony Default
 

Hi Geoff: The answer is yes. It's a qubit. (I couldn't go to Google, NBC and the local news stopped streaming. I could go to ABC, DN or the local news site though.) Guido

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Jordan Technician
Nevada
Jordan Default
 

There was only one TSB reflash populated by Techstream for an O2 fault code that I did not have.

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Anthony Technical Support Specialist
Pennsylvania
Anthony Default
 

Hi Jordan: I'm curious as to what the 3 HV calibrations are that were listed as ?. Is it safe for me to assume they didn't display after connecting to the server? Guido

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Jordan Technician
Nevada
Jordan Default
 

The first Health Report I did on the vehicle was offline of Toyota's server hence the question marks. I did scan it later with a Techstream subscription and there was a calibration update for Engine and ECT having to due an oxygen sensor fault.

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Jordan Technician
Nevada
Jordan Resolution
 

Yesterday was definitely Friday the 13th! I was struggling with several cars and this one got pushed to the back of the list. I did load the HV battery with the reverse brake torque and pulled the SOC down to below 40%. The Delta SOC never came off of 0 and the Min. Max. block voltages were within 400 - 500 mV. I pulled the battery fan out to check and it was clean (it was easy to access in the…

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