Transmission shift light D4 light stays on

Hi Lillian0625,

The D4 light also acts as an error warning indicator.

Since the light is on, you need to extract the error code to know what has gone wrong.

See the guide below on how to use a voltmeter:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

See diagrams below for instructions on code retrieval.

let us know if you need anything else.

For the windows, check if the swith for disabling the other windows have been accidently turned off.

Did you check the transmission fluid level?
Is there any indicators showing on dash?

The driver door not closing all the way could be due to a bad door glass regulator. Manually push the glass up by holding the glass between your hands and if it moves freely, the regulator is bad.

The others could be frozen due to the switch getting wet or the main switch has been turned off.

As to transmission, you would need to monitor the situation and when problem occurs, try shifting to D3 to see if the engine picks up speed easily. Does the Reverse occasionally takes forever to engage?

There is a problem with the transmission control module.

Replace the shift solenoid on the side of the case, this is a big problem with Honda.

Roy

Go back to shop/rebuild and tell them.

You read transmission codes same as CEL codes through diagnostic connector. The d4 light flashes codes.

Hello.

I have attached info on the two codes. Code 2 is for the lock up control solenoid B. I have attached information on check out of both A and B and how to change.

Test For Lock Up Control Solenoid A & B

NOTE: Lock-up control solenoid valves A and B must be removed/replaced as an assembly.

Disconnect the connector from the lock-up control solenoid valve A/B.

Measure the resistance between the No.1 terminal (solenoid valve A) of the lock-up control solenoid valve connector and body ground, and between the No. 2 terminal (solenoid valve B) and body ground.
Replace the lock-up control solenoid valve assembly if the resistance is out of specification.
If the resistance is within the standard, connect the No. 1 terminal of the lock-up control solenoid valve connector to the battery positive terminal. A clicking sound should be heard. Connect the No. 2 terminal to the battery positive terminal. A clicking sound should be heard. Replace the lock-up control solenoid valve assembly if no clicking sound is heard.

Service and Repair
Notes

Remove the mounting bolts and lock-up control solenoid valve assembly.
NOTE: Be sure to remove or replace the lock-up control solenoid valves A and B as an assembly.

Check the lock-up control solenoid valve oil passages for dust or dirt and replace as an assembly, if necessary.
Clean the mounting surface and oil passages of the lock-up control solenoid valve assembly and install a new filter/gasket.
Check the connector for rust, dirt or oil and reconnect it securely.

Code 15 is the main shaft speed sensor. I have attached info on how to check that also.

Remove the 6 mm bolt from the transmission housing, then remove the mainshaft or countershaft speed sensor.
Replace the O-ring with a new one before reinstalling the mainshaft or countershaft speed sensor.

Hello.

Looks like some progress.

How about clearing the codes? Drive it and see how it drives and check for codes again.

Hello

I have attached the troubleshooting tree for code 2.

Also, do you know what gear your transmission is starting out in? There may be an additional chart.