Diesel Data: Automotive Repair

Without Climate Control




The A/C condenser/radiator fans do not run at high speed, but do run at low speed ('10-11 models)

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

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

Radiator fan high speed circuit troubleshooting Radiator Fan High Speed Circuit Troubleshooting

Probable cause: A/C pressure sensor circuit malfunction

Do the A/C pressure sensor troubleshooting: A/C pressure sensor circuit low voltage P0532, A/C pressure sensor circuit high voltage P0533

NOTE: The A/C pressure sensor can malfunction without setting a DTC

Also check for

HVAC DTCs How To Troubleshoot The Heating And A/C Systems (Without Climate Control)

Also check for

Powertrain DTCs Initial Inspection and Diagnostic Overview

Also check for

Blown fuses No. 3-8 (30A) and No. 3-6 (30A) in the under-hood fuse/relay box

Also check for

Poor ground at G301 and G302

Also check for

Poor or loose connections at the terminals