Pinpoint Test T: U1000:00
- Refer to
MANUAL CLIMATE CONTROL SYSTEM
for schematic and connector information.
Normal Operation and Fault Conditions
The HVAC control module uses solid state drivers Field Effect Transistors (FET) to control the output of climate control systems. When an overload occurs on any of these drivers, the module disables the output and tracks the number of repetitive faults on each of these circuits. The module compares this number of overloads to three progressive thresholds established for each circuit. At each threshold, DTC U1000:00 sets along with the DTC associated with the affected circuit. For additional HVAC control module Field-Effect Transistor (FET) information, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition HVAC U1000:00 Solid State Driver Protection Active -Driver Disabled: No Sub Type Information The HVAC control module has disabled a circuit due to a repetitive circuit overload and a progressive threshold is met. Possible Sources
- Wiring, terminals, or connectors
- HVAC control module output circuit short
- HVAC control module
- T1 RECHECK THE (HVAC) HEATING, VENTILATION AND AIR CONDITIONING CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Using a diagnostic scan tool, carry out the HVAC control module self-test.
Is U1000:00 present?
Yes For DTC U1000:00, REPAIR all HVAC control module Non Communication Diagnostic Trouble Codes (DTCs) first. After the repair, CLEAR all Diagnostic Trouble Codes (DTCs). CARRY OUT the HVAC control module self-test. TEST for normal operations. No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.