# \[Need Help\] EMU Black primary trigger type - Nissan HR15DE crank wheel with two 180-degree opposed gaps **URL:** \ **Category:** V3 SOFTWARE\ **Tags:** trigger\ **Created:** [September 12, 2026, 5:38pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492 "2026-09-12T17:38:14Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 12, 2026, 5:38pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/1 "2026-09-12T17:38:14Z")
```auto Hello, I am converting a Nissan Grand Livina L10 (HR15DE, 4-cylinder, manual) to EMU Black with a custom harness, and I need help selecting the correct primary trigger type for the OEM crankshaft trigger wheel. ENGINE AND SENSORS - Engine: Nissan HR15DE, 4 cylinders, sequential injection planned - Crank sensor: OEM CKP, Hall effect (permanent magnet + Hall IC), reading a signal plate on the rear of the crankshaft - Cam sensor: OEM CMP (PHASE), Hall effect, retained - ECU: EMU Black, software version: 3.069 CRANK WHEEL PATTERN ``` ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/a/a70f4c40b546f40dd33b6bbfdeb955470fc6bcc5.png) ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/d/d5c17518f4a0cb2d6c749d8f5df609b7409f251c.jpeg) ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/2/2df026751229377a2409adc303132cf2fe008b64.jpeg) This is not a plain missing-tooth wheel. Derived and cross-checked from two independent sources: - 36 tooth positions at 10 degree pitch - 32 physical teeth: 30 single teeth plus 2 merged blocks - Each merged block is 3 teeth joined into one long tooth spanning 3 tooth positions, so each block removes 2 rising edges - The two merged blocks are exactly 180 degrees apart HOW I ARRIVED AT THAT MaxxECU documents the same trigger for the HR16DE (Tiida C11), which uses the identical wheel: > **[Nissan HR16DE (Tiida C11)](https://www.maxxecu.com/webhelp/trigger_system-nissan_tiida_c11_hr16de.html)** > > CAM trigger wheel    Crank trigger wheel     CAM trigger pattern for the Nissan Tiida.    Crank trigger pattern for the Nissan Tiida.   Trigger oscilloscope inpit From their crank trigger pattern plot: normal interval is about 1150 us, the long interval is about 3450 us, so the ratio is exactly 3.0, and the long interval recurs every 16 trigger events. Sixteen edges between gaps, with each gap occupying 3 tooth positions, gives 18 positions between gaps, therefore 36 positions per crank revolution with two gaps. The physical signal plate (91 mm inner diameter, Nissan Livina L10) independently counts 30 single teeth plus 2 merged blocks of 3 positions each, which also gives 36. MY QUESTIONS 1. Which primary trigger type should I select? “Toothed wheel with 2 missing teeth” with Num teeth = 36 looks wrong to me, because the decoder should find a second identical sync point at tooth 18. Setting Num teeth = 18 would make the ECU read double RPM and put the ignition map on a 180 degree cycle. 2. If this wheel can be decoded with the help of the cam signal, can the CAM #1 pattern options (Shorter than factor, Longer than factor, Factors sequence) be used to identify which of the two crank gaps is which within the 720 degree cycle? The OEM cam sensor produces pulses of clearly different widths. Attached: crank trigger pattern plot and trigger oscilloscope capture (both from the MaxxECU documentation page linked above), plus photographs of the physical OEM signal plate. Thank you for your help. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 12, 2026, 8:32pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/2 "2026-09-12T20:32:58Z")
> [@SparcoIma](#): > > ```auto > D SENSORS > - Engine: Nissan HR15DE, 4 cylinders, sequential injection planned > - Crank sensor: OEM CKP, Hall effect (permanent magnet + Hall IC), reading a signal plate on the rear of the crankshaft > - Cam sensor: OEM CMP (PHASE), Hall effect, retained > - ECU: EMU Black, software version: 3.069 > > ``` Use 18-2-18-2 Wrangler/Hemi/Dodge as primary trigger. For CAM if you send V3 scope I will adivce ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 12, 2026, 11:49pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/3 "2026-09-12T23:49:46Z")
> [@Jadzwin\_ECUMASTER](#): > > Wrangler dear @Jadzwin_ECUMASTER , Really appreciate your answer and suggestion, thanks alot. for the EDGE : RISING / FALLING ya ? for the cam scope are below : Blue - CAM, Red - Crank Trigger ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/6/6d52133517437d619cba8baca137e093d629435b.jpeg) ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 13, 2026, 11:22am UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/4 "2026-09-13T11:22:25Z")
Falling for crank. When you connect to emu, post a scope here with crank and cam. ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 15, 2026, 2:25pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/5 "2026-09-15T14:25:17Z")
hi @Jadzwin_ECUMASTER i already try to crank my engine and scope via ecumaster v3 software, but no signal detect, the gather data is finish and complete, already check don’t skip edge also but same. i still investigate the supply 5 volt to the CKP Sensor and also test to signal wire while crank. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 15, 2026, 3:26pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/6 "2026-09-15T15:26:35Z")
if there is no signal on scope, there must be no signal at the ECU pin, or trigger input is not set up properly (eg no pullup selected for hall sensor) ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 16, 2026, 1:06pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/7 "2026-09-16T13:06:20Z")
Hi @Jadzwin_ECUMASTER Finally i got the signal on scope, herewith i attatch the file. can you also suggest the first trigger tooth and trigger angle from the scope ? there are also signal for ignition ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/0/0085f38092f996cc1705d6cd28b27a8c6d392a15.png) [scope\_trigger\_hr15de\_qr25DE.emubscp3](https://community.ecumaster.com/uploads/short-url/eHPUyYkuDKoEAqmlC7zcf6dEFhc.emubscp3) (636 Bytes) below second try ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/5/52a196a1276f2ab0b5d910a03916266058cf741f.png) [scope\_trigger\_hr15de\_qr25DE\_2nd.emubscp3](https://community.ecumaster.com/uploads/short-url/3XoqbQtESAZXF3eCIsWp2dtRZYx.emubscp3) (626 Bytes) 3rd 🙂 ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/a/a8b0a6fbc51713a34f25102ecc6ca53b27aef400.png) [scope\_trigger\_hr15de\_qr25DE\_3rd.emubscp3](https://community.ecumaster.com/uploads/short-url/rNS9D8KsAEJlf81Lu8W0RQvHwVG.emubscp3) (623 Bytes) ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 3:04pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/8 "2026-09-16T15:04:21Z")
Try such settings and send the scope. You need to setup first trigger tooth and trigger angle with the timing light, but first we need to verify trigger decoder first. ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/7/77ea3dbb67d495b894afdf28af8b281009c48dd2.png) ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 16, 2026, 3:36pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/9 "2026-09-16T15:36:09Z")
okay i will test tomorrow, by the way as i know the cam is indicate the sequential of the cylinder , 1 3 4 2 , on HR15DE the firing order is 1 3 4 2, if we see the pict of scope #cam one line, 3 lines, 4 lines and 2 lines. my current configuration are below ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/7/7902197d0aca743f0cb6afdba684377795c4b3f7.jpeg) ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/6/6c27d03f07d6c9662ae0fc673851da87a00770e9.jpeg) and for #cam i will try it tomorrow (hopefully 9 hours later) with longer than factor , falling and factor longer 3x, will record scope and send it here. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 6:29pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/10 "2026-09-16T18:29:19Z")
it should sync on the edge that shown with the red arrow ( so on 1st cylinder) ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 18, 2026, 4:07am UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/11 "2026-09-18T04:07:57Z")
i am not test yet with configuration cam longer than factor, falling and factor longer 3x ( today will test ). oh ya for trigger crank , whether is decode well ? because the pattern is not stable ya. or could you please make trigger for this engine ? ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 18, 2026, 1:11pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/12 "2026-09-18T13:11:23Z")
Hi @Jadzwin_ECUMASTER i already test with below configuration ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/9/9344499c4036ab2413333ca07ef106f18445f714.png) i did 10 test crank on scope. ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/9/9ca187373e5c5d333392ccdf07f806964387eb65.png) ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/a/a968de66ab93f3b8f1d0a88d973f891da114007f.png) ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/0/057e47d832ec5e30185a4c3b28952833e29b44c2.png) [scope\_2026918\_1959\_1.emubscp3](https://community.ecumaster.com/uploads/short-url/vKcGK7uzo4FIPLH3wKQ8XGPZ9ua.emubscp3) (631 Bytes) [scope\_2026918\_1959\_2.emubscp3](https://community.ecumaster.com/uploads/short-url/x5Qum4TkALgodWsDzedBhtQRcMd.emubscp3) (653 Bytes) [scope\_2026918\_200\_3.emubscp3](https://community.ecumaster.com/uploads/short-url/tXnMuBpVMUywjALgwXXwmIdiYyT.emubscp3) (642 Bytes) [scope\_2026918\_200\_4.emubscp3](https://community.ecumaster.com/uploads/short-url/1KP21tNOxhJt7AkjNkDZFxpnrB5.emubscp3) (633 Bytes) [scope\_2026918\_200\_5.emubscp3](https://community.ecumaster.com/uploads/short-url/t09QEVYI10AS1PoYsdNsgvr03qy.emubscp3) (638 Bytes) [scope\_2026918\_201\_6.emubscp3](https://community.ecumaster.com/uploads/short-url/v9eXqvTMysBJUqux6506g0X04Gh.emubscp3) (632 Bytes) [scope\_2026918\_201\_7.emubscp3](https://community.ecumaster.com/uploads/short-url/sibZ5eeLjS6KsUDsFjEXf3JhddH.emubscp3) (634 Bytes) [scope\_2026918\_201\_8.emubscp3](https://community.ecumaster.com/uploads/short-url/a7spSIEBwrFroxCcFBitmZFFdqh.emubscp3) (641 Bytes) [scope\_2026918\_201\_9.emubscp3](https://community.ecumaster.com/uploads/short-url/rQqurHEs8pmS1rQizS3fV0k3E7e.emubscp3) (643 Bytes) [scope\_2026918\_202\_10.emubscp3](https://community.ecumaster.com/uploads/short-url/nltnofam4KiZfuWYTawZ9P4vOeQ.emubscp3) (643 Bytes) ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 18, 2026, 1:38pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/13 "2026-09-18T13:38:38Z")
Scope looks good! Now you can start the enginie. You need to setup firing order and coils first. Then with the timing lamp (lock the angle to 0deg in trigger settings) set the primary tooth and trigger angle. If you have the spark in perfect place and the engine doesnt start, invert the phase in firing order ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [September 18, 2026, 3:32pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/14 "2026-09-18T15:32:31Z")
Dear @Jadzwin_ECUMASTER So the decoder already okay and good ya ? Okay, i will test later. And give feedback here. Really appreciate for your best support ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [October 7, 2026, 7:55am UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/15 "2026-10-07T07:55:08Z")
Dear @Jadzwin_ECUMASTER i trying to crank the engine, but the engine not start yet, below is the scope ![image](https://europe1.discourse-cdn.com/flex013/uploads/ecumaster/original/2X/9/94771f58aa533a346035478baf9eee8fcc8d76a6.png) already inverse the ignition phase also and here is the log [20261007\_1449\_09.emublog3](https://community.ecumaster.com/uploads/short-url/e1UXET6Art5NDvAnXLdTNjkJXGt.emublog3) (467.1 KB) ---
**Author:** ![SparcoIma](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SparcoIma](https://community.ecumaster.com/u/SparcoIma)\ **Post date:** [October 13, 2026, 3:28pm UTC](https://community.ecumaster.com/t/need-help-emu-black-primary-trigger-type-nissan-hr15de-crank-wheel-with-two-180-degree-opposed-gaps/6492/16 "2026-10-13T15:28:14Z")
Dear @Jadzwin_ECUMASTER Could you please help me to first crank my engine ? this is the video [https://youtube.com/shorts/RER4dWPELUE?feature=share](https://youtube.com/shorts/RER4dWPELUE?feature=share), tomorrow i will share the emub3 project save.