So this project, swapping a 5vz motor, trans and wire harness from a 2000 year to a 2002. All has been smooth until now, motor installed and doing final connects I realize another mismatch in the electrical harness clips, this one behind the glove box. The Motor cranks but will not fire or run.

Trucks almost identical features, but some wiring components are a mis-match. The lower priority ones are the:

front differential and some of the evap hoses off the intake. The coolant tubes connection flanges to AC compressor also have mismatch formats. Also, I don’t have compressor and the power steering pump belts or wires connected, the wire clips all match though. I don’t think these disconnect will prevent it from turning over..?

The more serious problem seems to be the 3 clip series next to the ECU/ shown below. 1 of the clips doesn’t even fit (blue position) and there are several missing or mismatch wires here. I haven’t compared the wires on the ECU, but the clips fit. I understand that they could also be mismatch so Ill look at those as I try to decide what next??

1- Swap the ECU with same motor?

2- Use some starting fluid in the carb incase the fuel is stale.? The motor from the 2000 has sat for a year. The fuel in the 2002 only a bout 2 months old.

3- Map out all the wire colors and pin locations, compare with schematics and go crazy?

4- Locate the thread I thought I read recently about a member with a useful database of re-pining of these sort of things? Anyone recall that thread?

5- Remove the 2004 harness and place it back in the 2004 truck on the 2000 yr motor? This would require removing the intake plenum, but the wire clips would match!


what is this clip assembly wired to ? 2000 model

what is this clip assembly wired to ? 2002 model

 

Swapped in the 2000 ECU with its motor and harness. still not firing.

I pulled the fuel lines, connecting in the engine bay and they have fuel.. However it seems that I dont hear the fuel pump when the accessory /ign is turned on . any trouble shooting directions welcome....

 

Did you ever get this figured out? Am asking because there is a link (forgot where, but can find it again if need be) a link to FSM. Its listed as 96 to 02 4runner, auto.

I myself am trying to work on putting a 99 into a 95. Did notice some of schematics don't match reality of the 99 harness. In fact, some colors and plugs in one part (the Overall EWD) don't match a specific broken out schematic. (Was part of the II3 harness IIRC, on the Engine Control breakout.)

Just curious. Hope you got it and it runs like a scared rabbit.