Here are the description and diagostic procedures.
DTC P0753: NO. 1 SOLENOID CIRCUIT
Shifting is performed in combination with ON and OFF position of shift solenoids controlled by ECT ECU. If an open or short circuit occurs in either shift solenoid, ECT ECU reverts to fail-safe mode.
See Fig. 2. DTCs are output when a open or short circuit occurs.
Possible causes are:
No. 1 solenoid circuit.
No. 1 solenoid.
ECT ECU malfunction.
Diagnosis & Repair Procedure
1. Ensure ignition is off. Access ECT ECU. Backprobing ECT ECU harness connector with ohmmeter, measure resistance between terminal No. S1 and ground. If resistance is 11-15 ohms, replace ECT ECU and retest. If resistance is not within specification, go to next step.
2. Disconnect solenoid harness connector (next to PNP switch) at transaxle. Check continuity between terminal S1 of transaxle harness connector and corresponding terminal of ECT ECU harness connector.
3. If continuity exists, go to next step. If continuity does not exist, inspect and repair circuit as needed.
4. Measure resistance between transaxle connector terminals S1 and ground. If resistance is 11-15 ohms, replace solenoid. If resistance is not as specified, replace transaxle sub-harness as needed.
Friday, April 1st, 2011 AT 12:22 PM