2012 D40 no power to auto transmission

[aust303]

I carried out fault test on transmission harness no power at all not even standby power 1and2
Any ideas brains trust?

 

[Old.Tony]

I'd imagine it's a fuse in the engine bay, probably the black box just behind the battery.

 

[aust303]

I'd imagine it's a fuse in the engine bay, probably the black box just behind the battery.

Thanks mate
Checked that a few times over the corse
it seems to be the wires from plugs E6,E7 and E15,E13 in the drivers side engine bay fuse box all the wires to the transmission plug F 36
From transmission memory backup Red 1 and 2 goes to plug E15 blank
4 grey K line goes to orange E7
6 yellow power supply goes to black ground E7 (yep)
7 light green backup goes to blank
9 brown starter relay seem to be correct
And all other wires in the 2 plugs
Ive been using schematics that don't match
Been to a few wreckers to find what goes where and no luck , Spanish models all different
Any help would be appreciated

 

[Old.Tony]

2012 was part of the transition from the RE5 box to the RE7 so it's no surprise that there are a couple of variations in wiring. This continued until 2015 models, as far as I understand, so if you look at any 2011-2014 V9X model they SHOULD be similar, the YD25s are different and don't even have the E7 connector - but E7 also connects to the electronic throttle actuator (F8 - understandable for TCM control).

These also pass into the IPDM/ER which has a fuse for the TCM. This fuse is inside the IPDM/ER, it's 10A and located beside the cooling fan relay - 2nd from the end nearer the open space (the side with the chamfer).

 

[aust303]

2012 was part of the transition from the RE5 box to the RE7 so it's no surprise that there are a couple of variations in wiring. This continued until 2015 models, as far as I understand, so if you look at any 2011-2014 V9X model they SHOULD be similar, the YD25s are different and don't even have the E7 connector - but E7 also connects to the electronic throttle actuator (F8 - understandable for TCM control).

These also pass into the IPDM/ER which has a fuse for the TCM. This fuse is inside the IPDM/ER, it's 10A and located beside the cooling fan relay - 2nd from the end nearer the open space (the side with the chamfer).

Thanks for taking time Tony
Makes sense, Thought I was in a parallel universe.All relays and fuses seem good
( 3 auto sparkys, 3 mechanics and 2 gearbox specialist later) I will try sourcing something for a VX9
Im still unsure about the plugs
(E7)yellow one-side of plug black opposite (F8) - grey in orange opposite - light blue in blank opposite, light green in blank opposite
And on the other plug red in and blank opposite
Would it be common for the transmission wires (light blu, red,light green )to come up from transmission to a plug point that is blank on the opposite side , not to mention main power yellow from transmission to black earth that goes to the front near battery

 

[aust303]

Thanks Tony
Makes sense, Thought I was in a parallel universe.All relays and fuses seem good
( 3 auto sparkys, 3 mechanics and 2 gearbox specialist later) I will try sourcing something for a VX9
Im still unsure about the plugs
(E7)yellow one-side of plug black opposite (F8) - grey in orange opposite - light blue in blank opposite, light green in blank opposite
And on the other plug red in and blank opposite

I have checked IPDM fuses all good at the mo, but thanks again mate, your info will help me alot

 

[Old.Tony]

Thanks for taking time Tony
Makes sense, Thought I was in a parallel universe.All relays and fuses seem good
( 3 auto sparkys, 3 mechanics and 2 gearbox specialist later) I will try sourcing something for a VX9
Im still unsure about the plugs
(E7)yellow one-side of plug black opposite (F8) - grey in orange opposite - light blue in blank opposite, light green in blank opposite
And on the other plug red in and blank opposite
Would it be common for the transmission wires (light blu, red,light green )to come up from transmission to a plug point that is blank on the opposite side , not to mention main power yellow from transmission to black earth that goes to the front near battery

Nissan - as you might think - aren't in the habit of creating all this wiring and not having it go anywhere. Something in there isn't right, I wonder if you can spot any sign of the harness being modified/cut and taped up? Could someone have done this deliberately to cause grief? Maybe they were trying a modification to the car? Or - worse thought - they've put in the harness from a different model?

I'm struggling here too!

 

[aust303]

Nissan - as you might think - aren't in the habit of creating all this wiring and not having it go anywhere. Something in there isn't right, I wonder if you can spot any sign of the harness being modified/cut and taped up? Could someone have done this deliberately to cause grief? Maybe they were trying a modification to the car? Or - worse thought - they've put in the harness from a different model?

I'm struggling here too!

My thoughts also , like manual harness, big job ,the harness looks good cant quite read the parn number to check , but im out of ides and think manual harness
I checked the same same model in a 2014 today and yes the colors are to match
unlike my example
I have traced back the harness a couple of hundred mm and no sign of cut wires
I guess they were never there
if I find a schematic to suit I might be able to do something from point a to b and c
It seems to be only 4 wires
Is there anything to my 2 plugs being E6/E7 and not E6/ F7
Like E7 manual and F7 auto
This relay missing on mine mabee reverse lamp ( the other different blue might be spotlights)
Mine is 2 blu 2 blak and 1 light brown

 

[Old.Tony]

I'd have to go through the wiring diagrams for those plugs, which I can do tomorrow. I've been on the go since 3:30am, I'm calling it a night! I'll leave this thread open to remind me.

 

[aust303]

I'd have to go through the wiring diagrams for those plugs, which I can do tomorrow. I've been on the go since 3:30am, I'm calling it a night! I'll leave this thread open to remind me.

Thanks Tony
when you have time , no drama , been a couple of years so far , another week or so all good

 

[Old.Tony]

The harness in question is the "Engine Room Harness" and all models have F36 which is the important connector. I've gone over the wiring in as much detail as I can further down this post.

You appear to be missing the ECM relay - let's go over what's supposed to be in the relay box on a V9X engine. Note that there are six "spaces" on each side of the centre of the relay box, so I'm describing each space.

On the side with the fuses, from left to right:
- Fuse block No 2
- blank
- blank
- Transfer shut off relay-2
- Transfer shut off relay-1
- Back-up lamp relay

On the far side, left to right in that photo:
- ECM relay
- Front blower motor relay (the brown relay)
- Transfer shift low relay
- blank
- Transfer shift high relay
- blank

Okay, let's have a good look at the wiring diagrams. This is how it's supposed to be connected:

IPDM/ER fuse 59 (10A, 2nd from end near middle of side away from chamfer) to wire 14 in IPDM/ER connector - supplies ignition power directly to the gearbox via a YELLOW wire. This should be in a black 6-connector plug E18 but definitely ends up in F36 (staying as a yellow wire).

V9X-specific: Fuse 67 and 68 (both 10A) located in the fuse box with the transfer case fuses. Connected via plug E24, these fuses supply power to the transfer shutoff relays.

IPDM/ER fuse 25 - supplies continuous power (not switched by ignition) to AT through F36 - probably wire 2 (red).

E7 connector joins to F8 --> throttle control actuator.

E12 connector joins to F36 for ignition switched power on F36 pins 1 and 6.

F7 connector goes to body ground and connects to F36 terminals 5 and 10.

F36 connector goes to AT (round-sided green plug, 10 possible connectors)

Ground circuit: F7 body ground goes to F36 terminals 5 and 10.

F36 Connector has the following wire colours:

1 - "Sealed Outer" - Battery positive (ignition switched) (connects to F502 wire 9)
2 - Red - Battery positive (connects to F502 wire 10)
3 - Blue
4 - Gray
5 - Black - Battery negative
6 - Yellow - Battery positive, switched by ignition (connects to F502 wire 4)
7 - Light Green
8 - Pink
9 - Brown - Starter Relay Signal (from E17 wire 48) and to TCM connector F502 wire 8)
10 - Black - Battery negative

The manual does NOT specify the signal names for each of these wires (I'm annoyed at that). I've listed the items based on circuit diagrams elsewhere in the manual. The main circuit diagram for the transmission control module does NOT list these items, only that 5 and 10 are earth and the other wires are supposedly used.

The MANUAL transmission does NOT have any plugs like the AT does, but it does have a connection for the "backup lamp switch" and the "Park Neutral Position Switch". They are both 2-pin rounded connectors. The Backup Lamp is located lower on the rear right hand side of the gearbox, the neutral switch is above it.

The RE5 gearbox has SIMILAR plugs to the RE7 gearbox but from what I can see, they should all be functionally the same (F36 appears to be identical on both cars).

I really don't know how much help that's going to be. I've been through the service manual for several hours and can't make any more sense than the above.

However, at the very least, you now have the important wires and their colours for the plug that connects to the gearbox.

I truly hope that's been of some help!