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Home >> Suzuki >> 2007 >> Aerio Base, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Diagnostic Information and Procedures >> DTC P0727 (No. 35): Engine Speed Input Circuit No Signal >> 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 engine speed input signal circuit for open 
  1. Turn ignition switch OFF.
  2. Disconnect TCM and ECM connectors from TCM and ECM.
  3. Check for proper connection to TCM at terminal "G07- 15" and to ECM at terminal "G04-10".
  4. If OK, check continuity between terminals "G07-15" and "G04-10" of disconnected harness side TCM and ECM connectors.

Is continuity indicated? 		 Go to Step 3. "LT GRN/BLK" circuit open.
3  Check engine speed input signal circuit for short 
  1. Check continuity between terminal "G07-15" of disconnected harness side TCM connector and ground.

Is continuity indicated? 		 "LT GRN/BLK" circuit shorted to ground. Go to Step 4.
4  Check TCM terminal voltage 
  1. Connect TCM connectors to TCM with ignition switch OFF.
  2. Turn ignition switch ON.
  3. Measure voltage between terminal "G07-15" of connected harness side TCM connector and ground.

Is it 10 - 14 V? 		 Go to Step 5. Substitute a known-good TCM and recheck.
5  Check ECM terminal voltage 
  1. Turn ignition switch OFF.
  2. Connect ECM connectors to ECM.
  3. Turn ignition switch ON.
  4. Measure voltage between terminal "G04-10" of connected harness side ECM connector and ground.

Is it 10 - 14 V? 		 Intermittent trouble or faulty TCM or ECM.
Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION .
If OK, substitute a known-good TCM and/or ECM recheck.		 Substitute a known-good ECM and recheck.
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