How to access to S90 Transmission Control Module?

https://www.google.com/search?q=1999+Acura+CL+TCM+Location

..

NO PROBLEM TOLD , NOT ONE TINY CLUE JUST A HUNT
MOST TCM ARE INSIDE THE CONFINES OF THE PCM.
ECM BECAME PCM , THE P MEANS TRANNY TCM ADDED THERE
,BUT WITH SOME EXCEPTIONS ON ENGINE OR DIESEL OR OTHER REASONS. ONLY YOUR DEALER KNOWS WHAT IS THERE
FOR A TRANSMISSION OR LEARN TO READ YOUR VIN TO RPO
;LIST AND LEARN IT.
2004 IS NOT 2014 or 2023 it is a 2004 only question.
Suburban 1500 or 2500 not TOLD.
toss coin 1500
toss coin 4L60 transmission or 4L80
answer is PCM., located 16 control pins tranny to PCM , fact.
now where is the PCm/
we that is easy to
all in the service manual

ID#1

The Transmission Control Module (TCM) on a Volvo XC90 AWD 2.9 is located under the driver's side dash, attached to the underside of the steering column. It is mounted behind the steering wheel and can be accessed by removing the lower dashboard panel.

UP under left side of the instrument panel ! Remove left end access panel instrument panel .
Important: The access panel is removed in order to visually see the electrical connectors and the location of the transfer case control module. It will also be easier to see the mounting and alignment slots for the transfer case control module mounting bracket.
Remove insulator panel left side .
Remove the 2 screws that retain the insulator panel to the instrument panel (IP).
Release the insulator panel retaining clip from the IP substrate.
Lower the insulator panel.
Remove the 2 data link connector (DLC) retaining screws.
Remove the DLC from the insulator panel.
Remove the courtesy lamp from the insulator panel. Refer to Instrument Panel Courtesy Lamp Bulb Replacement in Lighting Systems.
Remove the splice pack from the insulator panel.
Remove the hazard and turn signal flasher from the insulator panel. Refer to Hazard and Turn Signal Flasher Replacement in Lighting Systems.
Remove the insulator panel from the IP.

Remove the transfer case control module (1) and mounting bracket from the instrument panel mag beam.
Disconnect the three electrical connectors from the transfer case control module.
Remove the transfer case control module from the mounting bracket.

The speedometer is in the instrument cluster. The speed sensor, I suspect this is your true question, is located in the transmission. If you look down, I know its difficult to see, where the dipstick tube goes into the transmission you will see a big electrical connector just to the right as you standing in front of the car. You will see the two rubber cooler hoses right above it. There will be a white plastic piece with a two wire connector right under those. That is the input speed sensor. This is not the part that needs to be replaced. The output speed sensors, the part that sends the speed signal to the computer, looks exactly like the input speed sensor but is located about 6-8" more to the right of the input speed sensor. Sometimes it is easier to spot from under the car.

If that sensor is bad it should flag a P0740 code in the pcm letting you know there are transmission codes stored in the TCM. A higher end scan tool (not a code reader) will be needed to get the codes from the TCM (transmission control module)

Hope that helps.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The problem is the transmission computer located under the riht front carpet and its the smaller of the 2 computers. You need to know what the code is. Use a paper clip and jump between the two wire SCS connector. Turn the key on and count any possible flashes in the check engine light. This connector is usually a blue connector and may be taped to the wire harness on that side with blue tape. If not, look behind the kick panel because they get placed behind this panel.




These cars are very bad about the TCM failing. If you get no flashes when you jump this connector but the light is on, the TCM (Transmission Control Module) has failed. Very common.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Fuse Locations & Functions
1. Washer nozzle heaters, glove compartment light (10A).
2. Turn signal lights (10A).
3. Fog light relay, instrument panel light dimmer switch (5A).
4. License plate light (5A).
5. Comfort system, cruise control, A/C, steering wheel module (7.5A).
6. Central locking system (5A).
7. Back-up lights, speedometer vehicle speed sensor (VSS) (10A).
8. Open
9. Anti-lock brake system (ABS) (5A).
10. Engine control module (ECM): gasoline engine (10A)
11. Instrument cluster, shift lock solenoid (5A).
12. Data Link Connector (DLC) power supply (7.5A).
13. Brake tail lights (10A).
14. Interior lights, central locking system (10A).
15. Instrument cluster, transmission control module (TCM) (5A).
16. A/C clutch, after-run coolant pump (10A).
17. Open.
18. Headlight high beam, right (10A).
19. Headlight high beam, left (10A).
20. Headlight low beam, right (15A).
21. Headlight low beam, left (15A).
22. Parking lights right, side marker right (5A).
23. Parking lights left, side marker left (5A).
24. Windshield washer pump, windshield wiper motor (20A).
25. Fresh air blower, A/C (25A).
26. Rear window defogger (25A).
27. Motor for rear windshield wiper (15A). (if equipped)
28. Fuel pump (FP) (15A).
29. Engine control module (ECM) gasoline engine (15A)
30. Power sunroof control module (20A).
31. Transmission control module (TCM) (20A).
32. Injectors: gasoline engine (10A)
33. Headlight washer system (20A).
34. Engine control elements (10A).
35. 12 V power outlet (in luggage compartment) (30A).
36. Fog lights (15A). (if equipped)
37. Terminal (86S) on radio, Instrument cluster (10A).
38. Central locking system (w/ power windows), Trunk light, fuel door, Trunk lid (15A).
39. Emergency flashers (15A).
40. Dual tone horn (20A).
41. Cigarette lighter (15A).
42. Radio (25A).
43. Engine control elements (10A).
44. Heated seats (15A). (if equipped)

Fuse arrangements in fuse bracket/battery:
S162. Glow plugs (coolant) (50A).
S163. Fuel pump (FP) relay/glow plug relay (50A).
S164. Coolant fan control (FC) control module/coolant fan (40A).
S176. Relays panel interior (110A).
S177. Generator (GEN) (90 Amp.) (110A). Generator (GEN) (120 Amp.) (150A).
S178. ABS (hydraulic pump) (30A).
S179. ABS (30A).
S180. Coolant fan (30A).

It's under the carpet on the passenger's side floor board. There's two boxes under the access panel, I think the TCM is the one on the right? If your's is broken there are probably a couple of capacitors and a resistor that are fried and need to be replaced.

it should be number 42


MKIV FUSE LIST
1. Washer nozzle heaters, glove compartment light, memory seat control module (10A).
2. Turn signal lights (10A).
3. Fog light relay, instrument panel light dimmer switch (5A).
4. License plate light (5A).
5. Comfort system, cruise control, Climatronic, A/C, heated seat control modules, automatic day/night interior mirror, control module for multi-function steering wheel, control unit in steering wheel (7.5A).
6. Central locking system (5A).
7. Back-up lights, speedometer vehicle speed sensor (VSS) (10A).
8. Open
9. Anti-lock brake system (ABS) (5A).
10. Engine control module (ECM): gasoline engine (10A); diesel engine, Model Year 2000 > (5A).
11. Instrument cluster, shift lock solenoid (5A).
12. Data Link Connector (DLC) power supply (7.5A).
13. Brake tail lights (10A).
14. Interior lights, central locking system (10A).
15. Instrument cluster, transmission control module (TCM) (5A).
16. A/C clutch, after-run coolant pump (10A).
17. Open.
18. Headlight high beam, right (10A).
19. Headlight high beam, left (10A).
20. Headlight low beam, right (15A).
21. Headlight low beam, left (15A).
22. Parking lights right, side marker right (5A).
23. Parking lights left, side marker left (5A).
24. Windshield and rear window washer pump, windshield wiper motor (20A).
25. Fresh air blower, Climatronic, A/C (25A).
26. Rear window defogger (25A).
27. Motor for rear windshield wiper (15A).
28. Fuel pump (FP) (15A).
29. Engine control module (ECM) gasoline engine (15A); diesel engine (10A).
30. Power sunroof control module (20A).
31. Transmission control module (TCM) (20A).
32. Injectors: gasoline engine (10A); diesel engine (15A).
33. Headlight washer system (20A).
34. Engine control elements (10A).
35. 12 V power outlet (in luggage compartment) (30A).
36. Fog lights (15A).
37. Terminal (86S) on radio, Instrument cluster (10A).
38. Central locking system (with power windows), luggage compartment light, remote/fuel tank door, motor to unlock rear lid (15A).
39. Emergency flashers (15A).
40. Dual tone horn (20A).
41. Cigarette lighter (15A).
42. Radio (25A).
43. Engine control elements (10A).
44. Heated seats (15A).
Fuse arangements in fuse bracket/battery:
S162. Glow plugs (coolant) (50A).
S163. Fuel pump (FP) relay/glow plug relay (50A).
S164. Coolant fan control (FC) control module/coolant fan (40A).
S176. Relays panel interior (110A).
S177. Generator (GEN) (90 Amp.) (110A).
Generator (GEN) (120 Amp.) (150A).
S178. ABS (hydraulic pump) (30A).
S179. ABS (30A).
S180. Coolant fan (30A).