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FP ISsues.. Update...Made major progress today. Replaced the Caps and installed ECM. Still no start. Troubleshooting revealed a flakey connection in the Fuse box under the dash, the IGN 10A fuse. Moving the fuse from side to side gives intermittent connection. So i wedged in a matchbook to keep...

yep...not new to imports but new to the V8 Uzi's! Ooozi...1UZ ! 1993 Gold on Tan LS400 1992 Gold on Tan LS400 Came here looking for Diagnostic help on getting 12v to FP. So far I suspect the ECM. But it's a labor love experience for now..when it becomes a money pit is when I get...

Fuel pump issues..... +B should be +12V anytime the ignition is on. It is controlled through the efi main relay. It is fused through the EFI fuse. If it isn't 12V with ignition on then there is some issue. Yeah I got 0 Volts on B+ Did you remove the fuse and check each one with a multimeter...

93 LS400 fuel pump Ok..gotcha. In that case, I have measured for voltage at the B+ terminal with the key on get 0 Volts. Does this mean the ECM is bad? I have checked every Fuse in this car (Inside under the dash drivers side footwell and under the hood) and they all check out. I have Swapped...

1993 LS400 Anyone have a link to a diagram showing the Fuel System and how it interfaces with the ECM---Fuel pump controller ECU (module)? Also, Which terminals are FP and B+ on the diagnostic plug, the Front two outer terminals or the two outer terminals in the rear of the plug? Looking at...