Climate Control System Symptom Troubleshooting - The A/C condenser/radiator fans do not run at high speed, but do run at low speed
The A/C condenser/radiator fans do not run at high speed, but do run at low speed
NOTE:
- Do not use this troubleshooting procedure if the A/C compressor is inoperative. Refer to the symptom troubleshooting index .
- If the A/C system is inoperable, the radiator and A/C condenser fans are controlled based only on engine coolant temperature.
- Before doing symptom troubleshooting, check for PGM-FI DTCs .
- Fuse check
-1. Check the following fuses.
Fuse No. A2-6 (30 A) Location Under-hood fuse/relay box Fuse No. B25 (7.5 A) Location Fuse/relay holder A Is each fuse OK?
YES
Go to step 2.
NO
Replace the fuse(s), and recheck. If the fuse(s) blows again, repair a short in the No. A2-6 (30 A) and/or the No. B25 (7.5 A) fuse circuit(s).
- A/C condenser fan low speed operation check
-1. Jump the SCS line with the HDS, and wait more than 1 minute.
NOTE: This step must be done to protect the PCM from damage.
-2. Disconnect the following connector.
1.5 L engine: PCM connector A (50P) 2.4 L engine: PCM connector A (51P) -3. Connect terminals A and B with a jumper wire.
1.5 L engine
Terminal A PCM connector A (50P) No. 17 Terminal B Body ground 2.4 L engine
Terminal A PCM connector A (51P) No. 9 Terminal B Body ground -4. Turn the vehicle to the ON mode.
Do the A/C condenser and radiator fans run on low?
YES
Go to step 3.
NO
Go to radiator and A/C condenser fan low speed circuit troubleshooting .
- A/C condenser fan high speed operation check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Connect terminals A and B with jumper wires.
1.5 L engine
Terminal A PCM connector A (50P) No. 18 Terminal B Body ground 2.4 L engine
Terminal A PCM connector A (51P) No. 10 Terminal B Body ground -3. Turn the vehicle to the ON mode.
Do the A/C condenser and radiator fans run on high?
YES
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM .
NO
Go to step 4.
- A/C condenser fan relay check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the jumper wires.
-3. Remove the A/C condenser fan relay from the relay holder F, and test it .
Is the relay OK?
YES
Go to step 5.
NO
Replace the A/C condenser fan relay.
- Open wire check (+B SUB FAN line)
-1. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected A/C condenser fan relay: disconnected Test point 1 A/C condenser fan relay 4P socket (female terminals) No. 1: Test point 2 Body ground Is there battery voltage?
YES
The +B SUB FAN wire is OK. Go to step 6.
NO
An open in the +B SUB FAN wire.
- Open wire check (SUB FAN MOTOR line)
-1. Connect terminals A and B with a jumper wire.
Terminal A A/C condenser fan relay 4P socket (female terminals) No. 1: Terminal B A/C condenser fan relay 4P socket (female terminals) No. 2: Does the A/C condenser fan run on high?
YES
The SUB FAN MOTOR wire is not open. Go to step 7.
NO
Repair an open in the SUB FAN MOTOR wire.
- A/C condenser fan relay coil side power circuit check
-1. Disconnect the jumper wire.
-2. Measure the voltage between test points 1 and 2.
1.5 L engine
Test condition Vehicle OFF (LOCK) mode PCM connector A (50P): disconnected A/C condenser fan relay: disconnected Test point 1 A/C condenser fan relay 4P socket (female terminals) No. 3: Test point 2 Body ground 2.4 L engine
Test condition Vehicle OFF (LOCK) mode PCM connector A (51P): disconnected A/C condenser fan relay: disconnected Test point 1 A/C condenser fan relay 4P socket (female terminals) No. 3: Test point 2 Body ground -3. Turn the vehicle to the ON mode.
Is there battery voltage?
YES
Repair an open in the FAN HI SIGNAL wire.
NO
Repair an open in the IGP2 SUB wire.