Toyota 4GRFE Mark X V6 2.5 liter D4 engine swap help needed

sdaniraza (sdaniraza) 2022-12-15 00:55:57 +0500 #21

Aslamualaikum, so far the immobilizer has been disabled by re programing the eprom 93c86, now the problem is , its not engaging any gear, PRND etc.......? We filled 4 liter of gear oil in gear, do we need to fill more? Or is it a wiring issue. Gear box does nor respind at all as if its not getting a signal to engage

Hassan1991 (Electrical Engineer ) 2022-12-15 01:07:29 +0500 #22

Wailaikum Assalam
Communcation problem probably. As ECU tells TCU to shift.
How did you reporgrammed the eprom?

sdaniraza (sdaniraza) 2022-12-15 01:10:24 +0500 #23

By recoding the eeprom,
And do you think its a wiring issue, as mechanical linkage is attached to the gear box. It 6 forward speed 1 reverse autogear with +/- manual option rear wheen gear

sdaniraza (sdaniraza) 2022-12-15 01:12:18 +0500 #24

Also how to to connect obd2 correctly? Any idea for the wiring?

Hassan1991 (Electrical Engineer ) 2022-12-15 01:17:22 +0500 #25

I mean which tool was used. Some details little if can.
Use a scanner to see if ecu is displaying the current shifter position.
There's different pids for both shifter and gear position. You can compare them.

sdaniraza (sdaniraza) 2022-12-27 14:43:32 +0500 #26

I once again tried to start it, engine starts normally but the gearbox does not respond. Its a wiring issue, as the engine had an awd gearbox when came and Kabarhiyaa changed its gear to RWD but he did not change wiring, its definetly a wiring issue. I will test it and reconnect / swap wires as per diagram

helper_learner (helper_learner) 2022-12-27 18:30:39 +0500 #27

Have you visited @dani_kk or @rajaatta? They will diagnose the problem.

capsat (ومن شر حاسد إذا حسد) 2022-12-27 19:12:04 +0500 #28

try to hook up with @nomi01 for electricals

Hassan1991 (Electrical Engineer ) 2022-12-27 21:28:55 +0500 #29

Have you tried the method i shared above?

sdaniraza (sdaniraza) 2023-05-05 19:10:04 +0500 #30

Aoa all....so far the engine swap is all done and its working fine....we also installed n electric steering from Mark X in this van...al wiring and EPS ecu is attached as per diagram but its electronic power steering doesnot work, neither does it communicate with engine ecu / obd DLC 3 .... Need help...anybody who has an idea?

sdaniraza (sdaniraza) 2023-05-05 19:12:23 +0500 #31

The engine and gear is now error free, the problem is mark x electronic power steering which does not respond or work.

sdaniraza (sdaniraza) 2023-05-12 09:22:34 +0500 #32

Aoa... The engine and gear is error free now. Instrument cluster installed and is working fine. Only issue is Mark x EPS is not working.