Applications Nissan TB48DE
Draft. Trigger offset has not been confirmed on a running Race Core install. Pins marked TBD are unknown — do not guess them. A wrong decoder or firing order can destroy the engine.
Nissan TB48DE
4.8 L straight six in the Y61 Patrol. Coil-on-plug with igniters in the coils on the common engine, port injection, and a crank/cam pair. There is no TB48 row in the rusEFI supported-trigger list this note was checked against. Do not borrow NISSAN_VQ35 or a 360° RB CAS.
Recommended: F7 or V4 for six injectors and six coils once the trigger is known. Log the factory wheels or fit a 36-1. V4 pin map is TBD. This is a large engine — a wrong firing order is expensive.
Status: draft. Trigger offset has not been confirmed on a running Race Core install.
- Cylinders: 6
- Displacement: 4759 cc
- Firing order: 1-5-3-6-2-4
- Orientation: Cylinder 1 at the front. Firing order 1-5-3-6-2-4, the Nissan straight-six order used on the RB notes.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| TB48DE | 2001– | OEM crank/cam, tooth count TBD | Y61 Patrol. COP, port injection. Confirm Hall vs VR on the sensor before you pick Digital 1 or VR 1. |
Recommended pin assignment (Race Core F7)
Pins below are the library default Race Core F7 map — the same AMPSEAL landings as the verified 1UZ-FE, 2JZ-GTE and LS1 notes. Core EFI V4 and Micro Core cavity numbers are TBD. If a pin is not in this table, it is TBD. Do not guess a spare.
| Pin | TunerStudio | Function |
|---|---|---|
| B5 / B13 | VR 1+ / VR 1− | Crank, if the sensor is 2-wire VR |
| B10 | Digital 1 | Crank, if the sensor is 3-wire Hall |
| B4 / B12 | VR 2+ / VR 2− | Cam VR |
| B1 | Digital 2 | Cam Hall |
| A3 | Lowside 1 | Injector cylinder 1 |
| A15 | Lowside 2 | Injector cylinder 2 |
| A4 | Lowside 3 | Injector cylinder 3 |
| A16 | Lowside 4 | Injector cylinder 4 |
| A5 | Lowside 5 | Injector cylinder 5 |
| A6 | Lowside 6 | Injector cylinder 6 |
| A35 | Ign 1 | Cyl 1 logic coil |
| A34 | Ign 2 | Cyl 2 logic coil |
| A22 | Ign 3 | Cyl 3 logic coil |
| A33 | Ign 4 | Cyl 4 logic coil |
| A32 | Ign 5 | Cyl 5 logic coil |
| A31 | Ign 6 | Cyl 6 logic coil |
| C20 | Analog Temp 3 | CLT |
| C30 | Analog Temp 2 | IAT |
| C13 | Analog Volt 1 | MAP 0–5 V |
| C24 | Analog Volt 2 | TPS 1 |
| C34 | Knock 1 | Knock |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| B17 / B16 | CAN 1 H / L | Dash / wideband |
| B18 | Battery Sense | Ignition-switched 12 V (5 A fuse) |
| B23 | +12 V MR | Main-relay 12 V into ECU |
| A17 A18 A24 B14 B19 B20 | Power GND | Engine block → battery − |
| C9 / C21 / C32 | 5 V Sens 1 | MAP, TPS, pedal 1 |
| C1–C8, C29, C31 | Sensor GND | 0–5 V and thermistor returns |
Trigger
No named decoder. A composite log is the first step. A 36-1 crank wheel is the path that already has a TunerStudio mode.
Crank
| Factory | Tooth count TBD. Do not call it a VQ35 or a 36-1 without counting. |
| Conversion | 36-1 Hall or VR. |
Cam
| Sync | One cam pulse on Digital 2 or VR 2 for sequential. Pattern TBD until logged. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 36-1 + cam after a conversion, or a mode added from your log. Not VQ35, not 360 CAS |
| Use only rising edge | VR: typically yes on MAX992x. Hall: as logged |
| Invert primary | No — swap VR wires first |
| Firing order | 1-5-3-6-2-4 |
Offset: Light on cylinder 1 at the front damper.
Injection
Six port injectors. Treat them as high-Z only after you meter them. Sequential after cam sync.
| Impedance | Meter. Low-Z without a resistor pack is not allowed on a 4 A saturated low-side. |
Ignition
If the coil is a logic coil (12 V, ground, signal), Ign 1–6 in cylinder-number order. If it is 2-wire, fit igniters or different coils. Dwell 2.0–2.5 ms for a logic coil, then check temperature.
| Order | 1-5-3-6-2-4 in software only. |
Idle
Identify the idle valve or DBW body on the Patrol you have. DBW needs F7 H-bridges. A cable idle-valve pin is TBD.
First start
- Load the matching variant configuration in TunerStudio before the harness is live — injectors and coils stay disconnected until the decoder is confirmed.
- Fuel pump fuse out. Coils unplugged or spark outputs disabled. Crank. Open Diagnostics → composite / high-speed logger.
- Confirm crank teeth are even, the missing-tooth (or named pattern) is a single clean gap, and cam is one pulse per two crank revolutions for sequential four-stroke.
- RPM during cranking should sit in the 150–350 rpm band. 0 rpm or 12,000 rpm means the decoder is lost — polarity or wheel type, not offset.
- Lock timing to a fixed 10° (idle control off). Timing light on cylinder 1. Change trigger offset until the damper agrees with 10°.
- Recheck at ~3,000 rpm. If timing walks with RPM, it is VR polarity, a delayed Hall, or the wrong decoder — not offset.
- Enable spark. Confirm a healthy burn (timing light or plug colour) with fuel still disabled.
- Enable fuel. Prime, then crank. Catch the first idle on a rich-safe VE, then lean toward stoich at idle.
- Only then enable closed-loop idle, VVT, boost and traction. A base map is a starting point, not a dyno tune.
A base map is a starting point, not a dyno tune.