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DTC C1252: Coupling Assembly Circuit Open: Troubleshooting

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
C1252: SYMPTOM TROUBLESHOOTING REFERENCE CHART

Step Action YES NO
1  Was "4WD control system check" performed?  Go to Step 2. Go to 4WD CONTROL SYSTEM CHECK .
2  Coupling assembly circuit check 
  1. Disconnect coupling assembly connector "L102" with ignition switch turned OFF.
  2. Check for proper connection to "L102-1" and "L102-2" terminals of coupling assembly connector.
  3. If connection is OK, measure voltage between "L102-1" terminal of coupling assembly connector and vehicle body ground.

Is it 10 - 14 V? 		 Go to Step 3. Go to Step 6.
3  Coupling assembly ground circuit check 
  1. Measure resistance between "L102-2" terminal of coupling assembly connector and vehicle body ground with ignition switch turned OFF.

Is resistance below 5 Ω? 		 Go to Step 4. Go to Step 5.
4  Coupling assembly check 
  1. Check coupling assembly referring to COUPLING ASSEMBLY INSPECTION .

Is it in good condition? 		 Substitute a known-good 4WD control module and recheck. Replace coupling assembly.
5  Coupling assembly circuit check 
  1. Disconnect connector from 4WD control module connector "G26" with ignition switch turned OFF.
  2. Check for proper connection to "G26-2" and "G26-3" terminals of 4WD control module connector.
  3. If connection is OK, measure resistance between "G26-2" terminal of 4WD control module connector and vehicle body ground.

Is resistance below 5 Ω? 		 "GRN" wire is open or high resistance circuit. Substitute a known-good 4WD control module and recheck.
6  Coupling assembly circuit check 
  1. Disconnect connector from 4WD control module connector "G26" with ignition switch turned OFF.
  2. Check for proper connection to "G26-3" terminal of 4WD control module connector.
  3. If connection is OK, measure resistance between "G26-3" terminal of 4WD control module connector and "L102-1" terminal of coupling assembly connector.

Is resistance below 5 Ω? 		 Substitute a known-good 4WD control module and recheck. "YEL" wire is open or high resistance circuit.
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