DTC C1253: Coupling Assembly Circuit Short: Troubleshooting

2013 Suzuki SX4 Crossover, Automatic CVT TransSECTION 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.
C1253: SYMPTOM TROUBLESHOOTING REFERENCE CHART

Step Action YES NO
Was "4WD control system check" performed?  Go to Step 2. Go to 4WD CONTROL SYSTEM CHECK .
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.
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.
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.
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 above 1 MΩ? 
"GRN" wire is shorted to ground circuit. Substitute a known-good 4WD control module and recheck.
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 above 1 MΩ? 
Substitute a known-good 4WD control module and recheck. "YEL" wire is shorted to ground circuit.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
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