2010 Cadillac CTS Sedan AWD V6-3.6L Page 1604
* 85 and 87
瀚慖f less than the specified range, replace the KR20 cooling fan relay.
4. Test for less than 2 ohm between terminals 30 and 87A.
瀚慖f greater than the specified range, replace the KR20E cooling fan relay.
5. Connect a 20 A fused jumper wire between relay terminal 85 and B+. Connect a jumper wire between relay terminal 86 and ground. Test for
less than 2 ohm between terminals 30 and 87.
瀚慖f greater than the specified range, replace the KR20 cooling fan relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
Dual Fan
DTC P0480, P0481, P0691, P0692, P0693, or P0694 (w/LLT and Dual Fan)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC P0480
- Cooling Fan Relay 1 Control Circuit
DTC P0481
- Cooling Fan Relays 2 and 3 Control Circuit
DTC P0691
- Cooling Fan Relay 1 Control Circuit Low Voltage
DTC P0692
- Cooling Fan Relay 1 Control Circuit High Voltage
DTC P0693
- Cooling Fan Relays 2 and 3 Control Circuit Low Voltage
DTC P0694
- Cooling Fan Relays 2 and 3 Control Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
