A/C Condenser Fan High Speed Circuit Troubleshooting
  1. Connect the ECM/PCM connector A (44P) No. 5 terminal (R20A3 engine model) or ECM/PCM connector A (49P) No. 6 terminal (K24Z3 engine model) to body ground with a jumper wire.
  1. Turn the ignition switch to ON (II).
Does the A/C condenser fan run on high?
YES -
Check for loose wires or poor connections at ECM/PCM connector A (44P) No. 5 terminal (R20A3 engine model) or ECM/PCM connector A (49P) No. 6 terminal (K24Z3 engine model). If the connections are good, substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away, replace the original ECM/PCM, R20A3 engine model, K24Z3 engine model. ■
NO -
Go to Step 9 .
  1. Turn the ignition switch to LOCK (0), then disconnect the jumper wire.
  1. Reconnect ECM/PCM connector.
  1. Remove the relay circuit board from the under-hood fuse/relay box, and test the A/C condenser fan relay.
Is the relay OK?
YES -
Replace the under-hood fuse/relay box. ■
NO -
Replace the relay circuit board.■