The Condenser/Radiator Fans Do Not Run At High Speed, But Do Run At Low Speed (With A/C)

The condenser/radiator fans do not run at high speed, but do run at low speed

Diagnostic Procedure:

1. Probable cause: Malfunction in the fan(s) high speed circuit

2. Do the following troubleshooting as needed: A/C condenser fan high speed circuit troubleshooting A/C Condenser Fan High Speed Circuit Troubleshooting

3. Radiator fan high speed circuit troubleshooting, R18A1 engine, Radiator Fan High Speed Circuit Troubleshooting K20Z3 engine Radiator Fan High Speed Circuit Troubleshooting

Also check for:

- HVAC DTCs Reading and Clearing Diagnostic Trouble Codes
- Powertrain DTCs; R18A1 engine, Reading and Clearing Diagnostic Trouble Codes K20Z3 engine Reading and Clearing Diagnostic Trouble Codes
- Poor ground at G301
- Poor or loose connections at the terminals