Question about Honda Cars & Trucks
2011 odyssey flashing d4, van start, moves when in drive on his own but does not accelerate
Automatic trans cars. gotta love em....
d4 flashing is explained in the FSM.
it means it sees and has logged, errors.
so look at the tachometer. see that needle that is engine RPM
and if the engine screams (right foot action) that means the tranny is SLIPPING. if yes, its bad. so we diagose it , and not the engine
in 1second flat test that.
the FSM shows a stall test. its the same thing,
your car will in fact fail the stall test in the FSM of any car.
so why, ? well scan it. the 2011 has the TCM intergrated fully in to the
PCM and all DTC codes.
so any scan tool made can scan this PCM, so do so.
the codes will be like P07xx? 7 means tranny. or others.
in fact anytime the car or trans acts funny, SCAN IT.
and today's cars, do that , at even a twitch of something odd.
scan it , see errors, open FSM see them same page
see that. it tells you what to do next and what test to do next
all cars,made. (modern)
if the FSM makes no sense to you ,then take the car in for service
there are only 2 ways, you do , or they do..
The TCM (logic) has inputs that allows the TCM to shift the car.
if the inputs are good.
and the TCM outputs are good, the tranny is bad.
make sure the tranny ground strap to frame is NOT missing or damaged or the TCM can NOT TALK to the tranny.
in some cases the tranny pan can be drooped and bad solenoids swapped easy, depends on actual tranny type there.
ever do the 60,000 mile A/T full flush and new filter,??? ooops.
Posted on Feb 13, 2014
Testimonial: "thanks for your help. if I understand recommendation. the main reason why the does not accelerate is because of the tranny problem correct? this vehicle has only 70 miles. it was crash test vehicle I am rebuilding"
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Posted on Jan 02, 2017
SOURCE: Gear stick gets stuck
Check to see if the brake lights are working. If not, it is very likely that the brake switch has pitted or burned contacts. This circuit also controls the solenoid in the steering column to relase the gear shift. It is a safety feature so you (or a child) can't put the van in gear w/o having your foot on the brake. Look up under the dash and you can see the white/black switch and its plug attached just in front of the brake pedal lever. The switch simply twists out and unplugs. Note the depth of the switch by marking it with a pencil so that when you replace it, you maintain the same distance (too close and it won't be able to open; too far away and it won't be able to close properly).
It is a very cheap part and easy to replace. BTW the switch itself pops apart and can be made to work temporarily by using an emory board or sandpaper to clean the metal contacts. ALSO if this isn't your particular problem, you can use a small screwdriver to pop open the little plastic insert on the top of the steering column near the gear shift. Push down on the inner piece to manually release the solenoid and get the van in gear.
Hope this helps.
Posted on Sep 24, 2008
Since warm air eventually comes out when the vehicle is in motion, you may have an air mix door that is stuck in fresh or is somehow blocking warm air from the heater core.
To see if the air mix control motor is bad, you need to retrieve your Diagnostic trouble codes (DTC's) from the heater control panel. To run the diagnostic function, do the following:
1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirc control button to select Recirc (recirc light on.)
4. Press and hold the recirc button to select Fresh (recirc light off) and continue to hold the button down until the recirc light comes on for two seconds and then goes off.
5. If the system is okay, the recirc light stays off.
6. If there is a problem, the recirc light blinks the DTC to indicate the trouble. One blink=a problem in the air mix control motor circuit. Two blinks=problem in the mode control motor circuit
Three blinks=problem in evaporator temp sensor circuit.
7. Turn the ignition switch off to cancel the self diagnosis function. Run the diagnostic again after repairs are complete.
Note: the air mix control motor has a rod which connects to a plastic link. The link controls the mix doors and also connects to the heater control water valve via a cable. The air mix motor may check okay, but if the link is broken then you will still have problems. the motor is on the bottom of the heater unit in the front passenger's foot well.
Posted on May 11, 2009
It's the neutral safety switch. Have your mechanic adjust it, or replace it if it's bad. For now try starting it in neutral instead of park or even try pushing the shifter up all the way (in park) while you turn the key.
Posted on Sep 21, 2009
the d4 light and the check engine light come on at the same time due to a transmission fault code stored. the cel code will prob be p0700=a/t fail codes.....this might be a pressure switch in the transmission or maybe a bad transmission. BUT...we need to know the codes
Posted on Mar 17, 2010
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