2001-2004 Models

NOTE:

Record all freeze data and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

Turn the ignition switch ON (II).
Check whether the scan tool or the HDS indicates code for the engine coolant temperature (ECT) sensor.
Does the scan tool or the HDS indicate code for ECT sensor?
1. YES -Do the DTC Troubleshooting for the ECT sensor circuit low voltage (see DTC P0117: ECT SENSOR CIRCUIT LOW VOLTAGE ), and the ECT sensor circuit high voltage (see DTC P0118: ECT SENSOR CIRCUIT HIGH VOLTAGE ). Recheck for DTC P1792 after troubleshooting.
2. NO -Turn the ignition switch OFF, then go to step 3.
Disconnect TCM connectors A (26P) and B (22P).
Turn the ignition switch ON (II).
Measure the voltage between TCM connector terminals B20 and A4.

Fig 1: Measuring Voltage Between TCM Connector Terminals B20 And A4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?
1. YES -Go to step 6.
2. NO -Repair an open or short in VREF wire between TCM connector terminals B20 and the ECM.
Measure the voltage between TCM connector terminals A19 and A4.

Fig 2: Measuring Voltage Between TCM Connector A (26P) Terminals A19 And A4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.1 - 4.8 V?
1. YES -Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM (see HOW TO TROUBLESHOOT CIRCUIT AT THE TCM ) and recheck.
2. NO -Repair an open or short in the wire between TCM connector terminal A19 and the ECT sensor.