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SECTION VIIC<br />
SERVICE PROGRAMMING SYSTEM<br />
Control Module Stand-Alone Programming Adapter (J-45211) for Cadillacs<br />
The J-45211 control module stand-alone programming adapter (Figure VIIC-41), also called the PCM<br />
programming adapter harness, is used to connect the <strong>Tech</strong> 2 to a vehicle’s PCM and perform SPS<br />
functions for the 2000 or later Cadillac models DeVille, Seville, and Eldorado. The J-45211 isolates the<br />
PCM from a vehicle’s electrical system so that the activity of other on-board <strong>com</strong>puters cannot interrupt<br />
the <strong>com</strong>munication between the <strong>Tech</strong> 2 and the PCM.<br />
NOTICE<br />
Failure to maintain unbroken J-45211 connections (PCM, <strong>Tech</strong> 2, power, and ground) throughout the<br />
entire programming procedure may cause an interruption, resulting in PERMANENT PCM DAMAGE.<br />
Procedure for Using the J-45211 Tool:<br />
1. Ensure that the <strong>Tech</strong>line terminal and the <strong>Tech</strong> 2 are updated with their latest respective software.<br />
2. Turn the vehicle ignition off and remove the key from the ignition lock cylinder. Turn off all electrical<br />
power consumers and accessories.<br />
3. Open the hood and measure the battery voltage directly at the battery positive and negative terminals<br />
using the J-39200 digital multimeter. If the negative battery terminal is inaccessible, or the battery is not<br />
located under the hood, check the voltage between engine block ground and the underhood “+” junction<br />
block.<br />
4. If the vehicle’s battery voltage is not 12.0 volts or higher, charge the battery before continuing. When<br />
finished charging the battery, disconnect the charger from the battery before programming the PCM.<br />
Figure VIIC-41<br />
Control module stand-alone programming adapter J-45211<br />
Procedure for the J-45211 continued on next page...<br />
2005 <strong>Tech</strong> 2 <strong>User</strong>’s <strong>Guide</strong> VII - 63