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Home >> Suzuki >> 2010 >> Grand Vitara Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - 4AT >> Diagnostic Information and Procedures >> DTC P0973/P0976: Shift Solenoid "A" Control Circuit Low/Shift Solenoid "B" Control Circuit Low >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "A/T System Check" performed?  Go to Step 2. Go to A/T SYSTEM CHECK .
2  Check shift solenoid valve circuit for ground short 
  1. Disconnect TCM connectors.
  2. Check for proper connection to TCM at terminals "E92-16" (for shift solenoid valve-A), "E92-15" (for shift solenoid valve-B).
  3. If connection is OK, measure resistance between terminal "E92-16" (for shift solenoid valve-A), "E92-15" (for shift solenoid valve-B) of disconnected harness side TCM connector and ground.

Is it less than 11 Ω? 		 DTC P0973: Shift solenoid valve-A circuit is shorted to ground. DTC P0976: Shift solenoid valve-B circuit is shorted to ground. If circuit is OK, go to Step 3. Go to Step 3.
3  Check solenoid valve 
  1. Check pressure control solenoid valve referring to SOLENOID VALVES (SHIFT SOLENOID-A, SHIFT SOLENOID-B, TCC PRESSURE CONTROL SOLENOID AND PRESSURE CONTROL SOLENOID) INSPECTION .

Is check results satisfactory? 		 Intermittent trouble or faulty TCM. Check for intermittent trouble referring to INTERMITTENT AND POOR CONNECTION INSPECTION , If OK, substitute a known-good TCM and recheck. Replace defective solenoid valve referring to SOLENOID VALVES (SHIFT SOLENOID-A, SHIFT SOLENOID-B, TCC PRESSURE CONTROL SOLENOID AND PRESSURE CONTROL SOLENOID) REMOVAL AND INSTALLATION .
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