Pinpoint Test H: DTC U3003
Climate Control System
Pinpoint Test H: DTC U3003
Refer to Wiring Diagram Set 54, Manual Climate Control System for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 55, Automatic Climate Control System for schematic and connector information. Diagrams By Number
NOTE: DTC U3003 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.
NOTE: Carry out a thorough inspection and verification before proceeding with the pinpoint test. Refer to Inspection and Verification. Inspection and Verification
Normal Operation
Under normal operation, the HVAC module receives a ground through circuit GD133 (BK). The HVAC module is supplied constant battery voltage through circuit SBP15 (WH/RD).
- DTC U3003:16 Control Module Input Power "A": Circuit Voltage Below Threshold - The module senses when battery voltage is greater than 16 volts.
- DTC U3003:17 Control Module Input Power "A": Circuit Voltage Above Threshold - The module senses when battery voltage is less than 9 volts.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- HVAC module
PINPOINT TEST H: U3003
H1-H4:
H4-H5:
