1. DTC P1261 description
The charge-up circuit within the ECM increases the voltage applied to the injector. The charge-up circuit is divided into 2 banks: common power supply 1 and common power supply 2. Common power supply 1 serves the injectors of cylinders No. 1 and No. 4, and common power supply 2 serves the injectors of cylinders No. 2 and No. 3. If there is an insufficient or excessive charge in the common power supply 1 injector charge-up circuit in the ECM, the DTC is set (Charge-up voltage DTC). If the supply voltage is excessively low or high in the common power supply 1 and 2 injector charge-up circuits, this DTC is set (Supply voltage low or high DTC).
2. Condition for setting DTC P1261
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition voltage is 9 to 16 V.
- The ignition switch is ON.
- The engine is running.
- DTC P06AF is not set.
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P06AF (Flash Code 277) EDU (Electric Driver Unit) Injector Custom IC".
Condition for setting the DTC
- The ECM detects a voltage malfunction in the common power supply 1 injector charge-up circuit in the ECM for 2.6 seconds or more.
3. Action taken when DTC P1261 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM inhibits the cruise control.
4. Condition for clearing DTC P1261
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".