A/C Condenser Fan High Speed Circuit Troubleshooting

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Do not use this troubleshooting procedure if the A/C compressor is inoperative. Refer to the SYMPTOM TROUBLESHOOTING INDEX .
Before doing any symptom troubleshooting, check for powertrain DTCs (see GENERAL TROUBLESHOOTING INFORMATION )

Check the No 3-3 (SUB FAN MTR) (30 A without SH-AWD) or No 3-2 (SUB FAN MTR) (40 A with SH-AWD) fuse in the under-hood fuse/relay, and the No 16 (7 5 A) fuse in the driver's under-dash fuse/relay box
Are the fuses OK?

YES -Go to step 2

NO -Replace the fuse(s), and recheck If fuse(s) blow again, check for a short in the No 3-3 (SUB FAN MTR) (30 A without SH-AWD) or No 3-2 (SUB FAN MTR) (40 A with SH-AWD) fuse, or No 16 (7 5 A) fuse circuits.
Jump the SCS line with the HDS
NOTE: This step must be done to protect the powertrain control module (PCM) from damage
Disconnect PCM connector A (49P)
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
Measure the voltage between PCM connector A terminal No 5 and body ground

Fig 1: Measuring Voltage Between PCM Connector A Terminal 5 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 6

NO -Repair open in the wire between the under-hood fuse/relay box and the PCM If the wire is OK, replace the under-hood fuse/relay box (see REMOVAL AND INSTALLATION )
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Connect the ECM/PCM connector A (49P) terminals No. 4, No. 5, and No. 40 to body ground with jumper wires.

Fig 2: Connecting PCM Connector A (49P) Terminals 4, 5 & 40 To Body Ground With Jumper Wires
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
Does the A/C condenser fan run on high?

YES -Check for loose wires or poor connections at ECM/PCM connector A (49P) terminals No. 4, No. 5., and No. 40. If the connections are good, substitute a known-good PCM, and recheck If the symptom/indication goes away, replace the original PCM (see ECM/PCM REPLACEMENT )

NO -Go to step 9
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
Disconnect under-hood fuse/relay box connector C (5P)
Check for continuity between under-hood fuse/relay box connector C (5P) terminal No. 2 and body ground
Is there continuity?

Fig 3: Checking Continuity Between Under-Hood Fuse/Relay Box Connector C (5P) Terminal No. 2 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

YES -Replace the under-hood fuse/relay box (see REMOVAL AND INSTALLATION )

NO -Check for an open in the wire between the under-hood fuse/relay box and body ground. If the wire is OK, check for poor ground at G302 (see LEFT ENGINE COMPARTMENT WIRE HARNESS (DASHBOARD BRANCH) )