P0727

DTC P0727 (No.35): Engine Speed Input Circuit No Signal

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and keep engine running for 30 seconds.
4) Check DTC, pending DTC and freeze frame data.

DTC Troubleshooting

1.
Was "A/T System Check" performed?
YES
Go to Step 2.
NO
Go to A/T System Check.

2. Check engine speed input signal circuit for open.

Turn ignition switch OFF.
Disconnect TCM and ECM connectors from TCM and ECM.
Check for proper connection to TCM at terminal "G07-15" and to ECM at terminal "G04-2".
If OK, check continuity between terminals "G07-15" and "G04-2" of disconnected harness side TCM and ECM connectors.

Is continuity indicated?
YES
Go to Step 3.
NO
"LT GRN/BLK" circuit open.

3. Check engine speed input signal circuit for short.

Check continuity between terminal "G07-15" of disconnected harness side TCM connector and ground.

Is continuity indicated?
YES
"LT GRN/BLK" circuit shorted to ground.
NO
Go to Step 4.

4. Check TCM terminal voltage.

Connect TCM connectors to TCM with ignition switch OFF.
Turn ignition switch ON.
Measure voltage between terminal "G07-15" of connected harness side ECM connector and ground.

Is it 10 - 14 V?
YES
Go to Step 5.
NO
Substitute a known-good TCM and recheck.

5. Check ECM terminal voltage.

Turn ignition switch OFF.
Connect ECM connectors to ECM.
Turn ignition switch ON.
Measure voltage between terminal "G04-2" of connected harness side ECM connector and ground.

Is it 10 - 14 V?
YES
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.
NO
Substitute a known-good ECM and recheck.