Code 26: Quad driver module

  • 1994 SATURN SC1
Computer problem

My car is getting a code for the quad driver module saying its getting the wrong voltage or something. The car drives fine. What exactly does the quad driver module control and what can I do to correct this problem?
Do you
have the same problem?
Thursday, September 23rd, 2010 AT 8:34 AM

1 Reply

The quad driver is not a module. It is a series of grounding transistors inside the ECM and they are used to control the relays and solenoids that are controlled by the ECM. That code sets when one of the components that they operate is drawing too much current and overloading the quad driver. This is not an easy problem to find and the component draw of each component has to be calculated by measuring resistance and using the Ohm's law formula until the bad component is found. The thing that further complicates the issue is that the current draw for any specific component can drastically increase when heated so it's hard to duplicate the situation that causes the problems.

See the guides below on using a voltmeter and testing wiring

See the wiring and troubleshooting diagrams below for code 26

Let us know if you need anything else
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Thursday, September 23rd, 2010 AT 9:10 AM

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