Applications Toyota 1JZ-GTE
Verified on the variant named in the note. Still set offset with a timing light on this car before enabling fuel.
Toyota 1JZ-GTE
The 2.5 L JZ. Same trigger families, idle, and pinout as the 2JZ-GTE at a smaller displacement. Common in Chaser, Cresta, Mark II, Soarer and JZX100/110.
Recommended: Copy the 2JZ-GTE Race Core F7 note. Change displacement to 2492 cc and required-fuel for the injectors you actually fitted.
- Cylinders: 6
- Displacement: 2492 cc
- Firing order: 1-5-3-6-2-4
- Orientation: Cylinder 1 at the front (timing-belt end).
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| 1JZ-GTE non-VVT-i | 1990–1996 | 12-tooth crank + cam | CT12A twins or later CT15B. Stepper idle. |
| 1JZ-GTE VVT-i | 1996–2007 | 36-2 + 3-tooth cam | Single turbo on most. VVT-i intake. |
Recommended pin assignment (Race Core F7)
| Pin | TunerStudio | Function |
|---|---|---|
| B5 / B13 | VR 1+ / VR 1− | Crank VR |
| B4 / B12 | VR 2+ / VR 2− | Cam VR |
| 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 bank 1 |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| B7/B6 + B15/B8 | ETB 1 ± / ETB 2 ± | Bipolar stepper (idle) |
| A2 | Highside 1 | VVT bank 1 / intake |
| 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 − |
Trigger
Identical rules to 2JZ-GTE. 12-tooth non-VVT-i, 36-2 VVT-i, Toyota 3-tooth (2JZ) cam decoder. Starting offset rumour is still 65° on 12-tooth — light it.
Crank
| Sensors | NE VR → B5/B13. Same Toyota two-wire VR as 2JZ. |
Cam
| G2 | VR → B4/B12. VVT-i uses 3-tooth, not a single tooth. |
TunerStudio
| Setting | Value |
|---|---|
| Trigger / wheel type | 12-tooth+cam or 36-2 + VVT Toyota 3-tooth |
| Use only rising edge | Yes on MAX992x VR (typical) |
| Invert primary | No — swap VR+ / VR− first if the gap is inverted |
| Cam as VVT input | Yes when the cam is used for sequential or VVT |
| Firing order | 1-5-3-6-2-4 |
Offset: Timing light on cylinder 1. Do not reuse a 2JZ 36-2 offset on a 12-tooth 1JZ.
- A 1JZ-GE VVT-i NA is the same decoder with different required-fuel and no boost solenoid.
Injection
High-Z. OEM around 380–440 cc depending on year. Sequential six drivers.
| Mode | Sequential. Cam required on 12-tooth. |
Ignition
COP conversion on Ign 1–6 is the usual Race Core path.
| Dwell | 2.0–2.5 ms logic COP. |
Idle
6-wire stepper on the two H-bridges, same as 2JZ.
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.