p2138 engine code - Toyota Yaris Forums

crazylegs · 08-11-2014, 03:32 PM

I never had to use one of those things before

ok this is what I got so far with the multi meter

when I checked the resistance (turn the dial to the horse shoe looking symbol at 200k) these are the numbers I get.

VPA APP a20-6 (Blue) to ECM a21-55 (blue) = 130
VPA2 APP a20-3 (Yellow) to ECM a21-56 (red) = 130

I tested the rest of the connections from the APP to the ECM and I got the value of 0 for each connection

so with that info I got I really still not sure If it means my wiring is good or bad. as I never done this before.

Also I noticed 2 wires the VCP2 a20-1 (white) and the EPA a20-5 (green) both go into the a different connector just above the pedal. and I do have cruise control is this the throttle control system exhacker1 was talking about. I'll have to go see where the blue and yellow wire go to.

also did a little test to the ECM and got these results which I assume means the ECM is working fine but I don't have a clue.

I checked the voltage by connecting the following pins on the APP connector while the ignition was set to ON.

VCPA (a20-4) and EPA (a20-5) = 5.05v
VCP2(a20-1) and EPA2 (a20-2) = 5.05v

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08-11-2014, 03:32 PM	#18
crazylegs Drives: 2007 Yaris Join Date: Aug 2014 Location: Winnipeg, canada Posts: 59	I never had to use one of those things before ok this is what I got so far with the multi meter when I checked the resistance (turn the dial to the horse shoe looking symbol at 200k) these are the numbers I get. VPA APP a20-6 (Blue) to ECM a21-55 (blue) = 130 VPA2 APP a20-3 (Yellow) to ECM a21-56 (red) = 130 I tested the rest of the connections from the APP to the ECM and I got the value of 0 for each connection so with that info I got I really still not sure If it means my wiring is good or bad. as I never done this before. Also I noticed 2 wires the VCP2 a20-1 (white) and the EPA a20-5 (green) both go into the a different connector just above the pedal. and I do have cruise control is this the throttle control system exhacker1 was talking about. I'll have to go see where the blue and yellow wire go to. also did a little test to the ECM and got these results which I assume means the ECM is working fine but I don't have a clue. I checked the voltage by connecting the following pins on the APP connector while the ignition was set to ON. VCPA (a20-4) and EPA (a20-5) = 5.05v VCP2(a20-1) and EPA2 (a20-2) = 5.05v