2006 Forenza- OBD2 DLC Communication Issues - Suzuki Forums: Suzuki Forum Site
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Old 10-23-2017, 01:01 PM   #1 (permalink)
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Default 2006 Forenza- OBD2 DLC Communication Issues

Hi All,

I have a 2006 Forenza that I am having issues with connecting a scanner to. There is power through the scanner to pin 16 (12 V) but I cannot get it to communicate with the ECM. I am sure it's not the scanner as I have plugged it into other cars and it works just fine. I have tried the following;

1.Made sure all the fuses, both in the engine compartment and instrument panel boxes, were all good.

2. Checked voltages and resistance/continuity at the DLC pins

When I checked voltages at the DLC everything seemed ok, except I have some questions for my pin 7 readings. At pin 7 with key in OFF position I was getting essentially 0 V, with Key in ON position I was getting about 8.5 V. Does anyone know what the voltages should be?

Any other troubleshooting ideas? Thank you.
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Old 10-23-2017, 02:13 PM   #2 (permalink)
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Is the scanner powering up?

Or, was the pin 16, just tested for the Bat+..

... Philip
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Old 10-23-2017, 04:40 PM   #3 (permalink)
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Hi aguanaut20 thanks for replying.

Yes, the scanner powers up. There's an LED that lights up when I first insert it into the DLC, and it also blinks as it attempts to connect/communicate with the ECM. After this I just get a "No response" message.
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Old 10-23-2017, 05:09 PM   #4 (permalink)
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I do not have a schematic for your ECU, but most require 2 power and 2 grounds, missing just one will stop comms..

... Philip
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