Common questions

What should the voltage be on a Class 2 serial pin?

What should the voltage be on a Class 2 serial pin?

With the Ignition on, the voltage on class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan tool. Connect positive DMM lead to DLC Battery + terminal Connect negative DMM lead to battery ground terminal

How to check J1939 datalink resistance across pins C and D?

Quick Test #1: Check the J1939 datalink resistance across pins C and D at the diagnostic connector. Result Possible Cause 60 Ω ± 6 Ω The datalink backbone is intact and both terminating resistors are installed. Go to Quick Test #2. NOT 60 Ω ± 6 Ω Check the J1939 datalink terminating resistors.

Why is the 301 Moved Permanently HTTP response code?

This has the same semantics as the 301 Moved Permanently HTTP response code, with the exception that the user agent must not change the HTTP method used: If a POST was used in the first request, a POST must be used in the second request. The server could not understand the request due to invalid syntax.

What does it mean when a response is sent on an idle connection?

This is similar to 401 but authentication is needed to be done by a proxy. This response is sent on an idle connection by some servers, even without any previous request by the client. It means that the server would like to shut down this unused connection.

Why is the 4 pin connector not working on my computer?

The four pin connector powers the CPU. The processor hasn’t been removed since the factory install. The case became damaged and we’re just swapping it into a new case. The computer still worked in the old, damaged case, so I’m assuming I must have damaged the board somehow in the swap.

Where are the extra 4 pins on the power supply cable?

The extra 4 pins on the cable just hang over the end of the motherboard connector. The 24 pin cable only fits into a 20 pin socket at one end so you can’t plug it in incorrectly. The extra 4 pins were added to the 24 pin version of the cable to provide one extra wire for ground, 3.3, 5, and 12 volts.

Where are the 4 pin connectors on a PSU?

The factory PSU only has one 14-pin and one 4-pin connectors and no other cables. The PSU 4-pin needs to be connected to the top-most connector (#1 on diagram). Seems like this is a way to reduce clutter from PSU cables.

How to configure a Molex connector for your application?

Configure a connector for your application— combine housings with pins and sleeves for different wire sizes. Use them with standard Molex connectors. Configure a connector for your application by combining housings with pins and sleeves for different wire sizes.

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Ruth Doyle