JZA70 error code??

supramonsta · 11-18-2016, 07:22 PM

Hi, sorry if this is an easy one, but I am struggling to find the answer. When doing a diagnostic ecu error check, does a constantly flashing engine light (no delays in timing) mean the system is ok?

Reason being is a have a poor old girl that hasn't been started for about 9 years (yikes) and i'm trying to revive her.

on this matter, a couple of years ago I got her running briefly on engine start....but couldn't get her to run without it. So I gather spark was ok, but not sure on fuel/ On a 1JZ, whats the easiest way to check the fuel pump for operation.

Many thanks

btwilson86 · 11-21-2016, 01:38 AM

Constant flashing CEL while in diagnostic mode indicates that there are no codes stored.

I'm not positive on the best way to check the fuel system operation on a 1JZ, but if it's anything like the 7M and it has a similar diagnostic port, you should be able to jump a wire from FP to B+; with the ignition key set to "Run", this provides the 12V positive power through the fuel pump circuit and you should have a constant running fuel pump until you turn the key off or remove the jumper wire.

11-18-2016, 07:22 PM	#1
supramonsta Stock Join Date: Nov 2016 Location: NZ Posts: 1	JZA70 error code?? Hi, sorry if this is an easy one, but I am struggling to find the answer. When doing a diagnostic ecu error check, does a constantly flashing engine light (no delays in timing) mean the system is ok? Reason being is a have a poor old girl that hasn't been started for about 9 years (yikes) and i'm trying to revive her. on this matter, a couple of years ago I got her running briefly on engine start....but couldn't get her to run without it. So I gather spark was ok, but not sure on fuel/ On a 1JZ, whats the easiest way to check the fuel pump for operation. Many thanks

11-21-2016, 01:38 AM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Constant flashing CEL while in diagnostic mode indicates that there are no codes stored. I'm not positive on the best way to check the fuel system operation on a 1JZ, but if it's anything like the 7M and it has a similar diagnostic port, you should be able to jump a wire from FP to B+; with the ignition key set to "Run", this provides the 12V positive power through the fuel pump circuit and you should have a constant running fuel pump until you turn the key off or remove the jumper wire. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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