Diagnostic Instructions
DTC Descriptor
DTC B1023 05: Integral Switch Performance Short to Ground
DTC B1023 06: Integral Switch Performance Short to Battery or Open
DTC B1023 61: Integral Switch Performance Signal Invalid
Circuit/System Description
This DTC is not associated with any wiring. It is an internal fault inside the HVAC control module for a stuck or shorted control button.
Conditions for Running the DTC
Battery voltage is between 9-16 volts and data link communications operate normally.
Conditions for Setting the DTC
The HVAC control module has internal fault inside the HVAC control module for a stuck or shorted control button.
Conditions for Clearing the DTC
• | A current DTC clears when the malfunction is no longer present. |
• | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Circuit/System Verification
- Reprogram the HVAC control module that set DTC B1023. The module should successfully reprogram.
⇒ | If the module will not reprogram, replace the HVAC control module that set the DTC. |
- With a scan tool, clear the DTC.
- Ignition OFF.
- Wait 60 seconds, then recheck for DTCs. DTC B1023 should not set.
⇒ | If DTC B1023 sets, replace the module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming