Tahoe 2WD V8-6.0L Hybrid (2008)
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The connection at the data link connector (DLC)
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The voltage supply circuits
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DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or control
module damage may occur.
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DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all control module and DLC connections are
secure and the TIS terminal operating software is up to date. Attempt to reprogram the control module. If the control module cannot be programmed,
replace the control module.
1.
Verify that 12-volt battery has a battery charge of 12 to 16 volts. The battery must be able to maintain a charge during programming. Only use
approved Midtronics 165-PCS charger or equivalent, to maintain proper battery voltage during programming.
2.
Reprogram the hybrid control modules. Refer to SI and Service Programming System (SPS) documentation for programming instructions, if
required.
Important:
Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen. The J2534 MDI will reprogram the
modules in less time then the Tech2(R) scan tool. DO NOT use a Tech2(R) to program the hybrid control modules.
2.1.
Connect the MDI to the vehicle.
2.2.
Select SEQ HCP/ECM/TCM/BECM/EBCM Sequential Programming from the Supported Controllers screen.
2.3.
Follow the on-screen instructions.
Important:
If the vehicle was driven into the service area, then the 300-volt battery is sufficiently charged. Ignore the TIS2WEB screen that instructs the
technician to charge the 300-volt battery system. Select Next and continue. It is important to monitor the status of the programming event. Five
hybrid control modules will be programmed sequentially. During the programming events, the headlights of the vehicle will turn on after each
module has been programmed. Turn off the headlights after each programming event.
3.
After completing the sequential programming events, clear all DTCs using the MDI, then cycle the ignition OFF for 30 seconds.
4.
Remove the MDI and connect the Tech 2(R) scan tool.
5.
Perform an EBCM relearn procedure using the Tech 2(R) scan tool. Refer to SI and Service Programming System (SPS) documentation for
programming instructions, if required.
6.
After performing the EBCM relearn procedure, first clear EBCM DTC codes and then clear ECM codes.
7.
Start the vehicle. Ensure no DTCs are present. Also verify that no instrument panel service telltale symbols are illuminated.
8.
Perform High Voltage Circuit Impact Detection Sensor Replacement procedure in this bulletin.
High Voltage Circuit Impact Detection Sensor Replacement
1.
Turn the ignition switch to the off/lock position and remove the ignition key. Do not insert the ignition key into the ignition until the procedure has
been completed.
2.
Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
3.
Remove the engine shield from the vehicle.
