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 (With A/C)

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 How To Troubleshoot The Heating and A/C Systems (With A/C)
- Powertrain DTCs; R18A1 engine, Initial Inspection and Diagnostic Overview K20Z3 engine Initial Inspection and Diagnostic Overview
- Poor ground at G301
- Poor or loose connections at the terminals