Diesel Data: Automotive Repair

Climate Control




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

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

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

Also check for

HVAC DTCs How to Troubleshoot the Climate Control System

Also check for

Powertrain DTCs Initial Inspection and Diagnostic Overview

Also check for

Blown fuse No.11 (30 A) in the under-hood fuse/relay box

Also check for

Poor ground at G201

Also check for

Poor or loose connections at the terminals