Silverado 1500 2WD V6-4.3L (2007)
The concern must be current before diagnosis can be performed.
Review and print the following SI documents - Electrical Center Identification Views, for use during diagnosis:
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Junction Block - Right I/P, Top View
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Junction Block - Right I/P X4
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Junction Block - Right I/P X5
Locate the Junction Block - Right Side IP on the vehicle.
For the appropriate actuator, measure the following signals for voltage/resistance from the BACK of the X4 or X5 connector and record the following:
DO NOT unplug the X4/X5 connector.
Turn Ignition On, A/C Blower Full, if possible - mode on "panel" and Temp to "cold."
Once the fault is removed, the actuator will stay in default position until commanded to a new position. Change commanded position regularly to see if
the issue is still current.
Continue to monitor door positions (feedback) on Tech2 to see if it changes during circuit testing.
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Ignition Voltage - 12V
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Door Control Signal - 2.5V when stationary, OV when commanded toward "cold" or "panel", 5V when commanded toward "hot" or "defrost"
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Low Reference - less than 40 ohm with ignition on. Less than 10 ohm with ignition off
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Door Position Signal - measure voltage
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5 Volt Reference - 5V
If any signals do not display the correct value or if the issue is corrected during testing, pull the connector and check the terminal for poor tension (use
the appropriate terminal tool). Replace or repair the terminal if poor tension is found.
If all signals are correct at RH BEC, reconfirm the customer's comments.
If the condition is not present, no further repairs are necessary. If the condition is still present, recheck the actuator connector 5 volt reference circuit, pin
drag test and repair connector/pin as necessary.
Warranty Information
For vehicles repaired under Enqineerinq direction, use the table.
