emissions test fail, couldn't read computer
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Joined: Feb 2017
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emissions test fail, couldn't read computer
Person at emission testing said he could not read the computer on my 96 Dodge Ram truck. He said check the fuse to the ECM. Can not find in the diagrams an ECM fuse.
Captain
Joined: Sep 2013
Posts: 586
Likes: 17
From: Nevada
If the IOD fuse has popped, it will keep the obd stuff from communicating. It's the one with the cover on it in the fuse block on the dash.
I remember another fuse causing the same issue with the obd port, but I don't remember which one. Good luck and happy hunting.
I remember another fuse causing the same issue with the obd port, but I don't remember which one. Good luck and happy hunting.
Record Breaker
Joined: Apr 2013
Posts: 1,815
Likes: 56
From: Alberta
if the scan tool will not power up; check for power at pin 16 of the data link connector. this pink wire should have battery voltage at all times. If no power, check fuse 17 in the fuse block
if the scan tool powers up but will not communicate with the ecm, check the communication lines pins 6 & 7 of the dlc for voltage.
if the scan tool powers up but will not communicate with the ecm, check the communication lines pins 6 & 7 of the dlc for voltage.
Professional
Joined: Jan 2017
Posts: 199
Likes: 1
From: vancouver, wa
if the scan tool will not power up; check for power at pin 16 of the data link connector. this pink wire should have battery voltage at all times. If no power, check fuse 17 in the fuse block
if the scan tool powers up but will not communicate with the ecm, check the communication lines pins 6 & 7 of the dlc for voltage.
if the scan tool powers up but will not communicate with the ecm, check the communication lines pins 6 & 7 of the dlc for voltage.