Differences

This shows you the differences between two versions of the page.

--- connectionproblem [2013/02/28 13:27]
twdorris
+++ connectionproblem [2024/03/15 10:57]
twdorris [Diagnostic port wiring]
@@ Line 29: / Line 29: @@
 ==== Diagnostic port wiring ====
-If you get desperate and need to confirm that the basic wiring in the car is correct, use the following information to buzz out the connections between the OBDII adapter and the ECU.  Note that the image below is of the connector in the car, not the ECMLink adapter.
-{{http://www.dsmlink.com/images/forums/obdiiconnector.gif}}
-||Pin 1||Diagnostic line to ECU (connector B-55, pin 56, yellow)||
+If you get desperate and need to confirm that the basic wiring in the car is correct, use the following information to buzz out the connections between the OBDII adapter and the ECU. Note that the image below is of the connector in the car, not the ECMLink adapter.
-||Pin 5||Ground||
-||Pin 7||Data line to ECU (connector B-55, pin 62, pink)||
-||Pin 16||+12v unswitched power||
+{{https://www.ecmtuning.com/images/forums/obdiiconnector.gif?nolink&207x72}}
+|Pin 1 ||Diagnostic line to ECU (connector B-55, pin 56, yellow) ||
+|Pin 5 ||Ground ||
+|Pin 7 ||Data line to ECU (connector B-55, pin 62, pink) ||
+|Pin 16 ||+12v unswitched power ||
 Pin 16 can be connected to ECU pin 80 (connector B-56, Red-Blue) if needed.
 Pin 5 can use a chassis ground point.
-You can get information on ECU connector pin locations from the [[ECUWiringInformation]] page.
-If pin 16 does not show power (it should have 12v at all times when measured against pin 5), the fuse powering this pin may be blown.  The same fuse powers the key illumination ring, the lights in the rear view mirror, the foot light under the dash, and also provides battery backup power to the ECU.  It's labeled in the shop manual as dedicated fuse #11.  It is located under the hood in the main fuse box. Looking down at the fuse box standing in front of the car, fuses #11 and #12 are grouped together in a yellow clip located in the lower left hand corner of the fuse box.  The lid of the fuse box labels fuse #11 as Room Lamp.
+You can get information on ECU connector pin locations from the [[:ecuwiringinformation|ECUWiringInformation]] page.
+If pin 16 does not show power (it should have 12v at all times when measured against pin 5), the fuse powering this pin may be blown. The same fuse powers the key illumination ring, the lights in the rear view mirror, the foot light under the dash, and also provides battery backup power to the ECU. It's labeled in the shop manual as dedicated fuse #11. It is located under the hood in the main fuse box. Looking down at the fuse box standing in front of the car, fuses #11 and #12 are grouped together in a yellow clip located in the lower left hand corner of the fuse box. The lid of the fuse box labels fuse #11 as Room Lamp.
+You can also do a basic check against the diag pin (pin 1) of the OBD-II connector. Check the voltage on the cars' OBD-II pin 1 without the ECMLink adapter attached. It should be ~5V or higher. If not, something is grounding it. This can make the ECU behave oddly, prevent ECMLink communication, and may cause problems with your locks.
+Please use care when checking the diagnostic port pins. If you jam the typical multimeter probes into the pins, you can stretch the pins enough that they may not make proper contact with the ECMLink connector.
-You can also do a basic check against the diag pin (pin 1) of the OBD-II connector.  Check the voltage on the cars' OBD-II pin 1 without the ECMLink adapter attached. It should be ~5V or higher. If not, something is grounding it. This can make the ECU behave oddly, prevent ECMLink communication, and may cause problems with your locks.
-Please use care when checking the diagnostic port pins.  If you jam the typical multimeter probes into the pins, you can stretch the pins enough that they may not make proper contact with the ECMLink connector.
+\\
 ==== DB9 cable checkout (V2 ONLY) ====

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