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Old 09-28-2012, 02:34 PM   #1
wrxr4ti
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Member#: 100724
Join Date: Nov 2005
Chapter/Region: NWIC
Location: Portland OR
Vehicle:
98 Impreza RSTi
RED

Default RUTROW, No 5v to crank/cam on a 20k

So she just died, on the road( v4 ej20k swap). Got it back to the garage, no wave pattern from crank/cam sensor. No 5v from ECU pin 9 connector b136. I think the ecu went sizzles, but want to check if anyone else here had this problem?

Last edited by wrxr4ti; 09-28-2012 at 04:22 PM.
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Old 09-28-2012, 04:22 PM   #2
eg33GC
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99 V4
EJ20K RS

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both the cam and crank have nothing?
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Old 09-28-2012, 04:37 PM   #3
wrxr4ti
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yep nothing out of the ecu, and about .1 ohms from the sensor 5v and signal back to the ecu. I know im screwed. Just seeing if anyone has seen something funny like this. Or had any luck robbing 5v from another sensor to power up the cam/crank
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Old 09-28-2012, 04:38 PM   #4
eg33GC
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99 V4
EJ20K RS

Default

you may have a loose ground on the intake or a cut somewhere, I wouldn't freak out so quick
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Old 09-28-2012, 05:50 PM   #5
wrxr4ti
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98 Impreza RSTi
RED

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Update. pulled maf off......revs up now...and the quest for a JDM part happens again. Does anyone know of a Nissan model that uses the same maf?
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Old 09-28-2012, 05:55 PM   #6
eg33GC
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none directly.

buy an esl board for your ecu and either ditch the maf or use another unit, like a z32 or q45
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Old 09-29-2012, 10:57 AM   #7
69subaru360
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1995 WRX
1998 2.5 RS

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You can order a new orange EJ20k maf from any US subaru dealer, the part number is 22680aa271, it's a little over $300. You can find them used on ebay uk or yahoo japan auctions. I'd do new, who knows how long used will last, they aren't that reliable to begin with.
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Old 10-02-2012, 05:23 PM   #8
wrxr4ti
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just ordered a new on from The dealer, thanks everyone'
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Old 10-09-2012, 08:17 PM   #9
wrxr4ti
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so Still having problem. can I get someone with a 20k to verify for me the b136 pin needs to have 5 volts to the cam and crank sensors with key on engine off or just tell me what you have out at the cam sensor for voltages?
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Old 10-09-2012, 08:56 PM   #10
pmugabi
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I don't have a K anymore. However when I was re-wiring it to use an EJ20G ECU, I made a spreadsheet of all the ECU pins to assist in the pin re-assignment. The cam and crank +ve 5V is as below, so you're checking the wrong pin. If the car has an immobiliser, the cam and crank +ve are swapped around. The signals are only generated when the engine is on/cranking.

Cam PS +ve B136-8
Crank/Cam -ve B136-9
Crank PS Sig +ve B136-10
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Old 11-06-2012, 03:15 PM   #11
wrxr4ti
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RED

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"over night parts from Japan if we need them....." Well not to over night but a Brand new V4 MAF did the trick.
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