DTC Troubleshooting: P0123 (7)

DTC P0123: TP Sensor Circuit High Voltage Turn the ignition switch ON (II). Check the TP SENSOR in the DATA LIST with the HDS. Is there about 0.5 V when the throttle is fully closed and about 4.5 V when the throttle is fully opened?
YES | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM.■
NO | - | Go to Step 3 .
Turn the ignition switch OFF. Disconnect the TP sensor 3P connector. Turn the ignition switch ON (II). At wire harness side, measure voltage between TP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V?
YES | - | Go to Step 8 .
NO | - | Go to Step 7 .

Measure voltage between ECM/PCM connector terminals A20 and A23. Is there about 5 V?
YES | - | Repair open in the wire between the ECM/PCM (A23) and the TP sensor, then go to Step 10 .
NO | - | Go to Step 15 .
Turn the ignition switch OFF. Replace the throttle body (the TP sensor is not available separately). Reconnect all connectors. Turn the ignition switch ON (II). Reset the ECM/PCM with the HDS. Do the ECM/PCM idle learn procedure. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P0123 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■
Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P0123 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. ■