injector codes
anyone had to deal with p0204 injector circuit p1261 injector volt control and know what is the likely cause between the two of them.
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P0204
4 Attachment(s)
CIRCUIT DESCRIPTION
The fuel injection control module (FICM) supplies high voltage to each fuel injector on the ignition voltage circuits. The FICM energizes each fuel injector by grounding the command circuit between the FICM and the fuel injector. The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. When a fuel injector circuit condition is detected by the FICM, all of the fuel injectors on the affected ignition voltage circuit will be disabled. If a circuit condition is detected on a fuel injector circuit for cylinders 1, 4, 6, or 7, DTCs P0201, P0204, P0206, P0207 will set, along with DTC P1261. If a circuit condition is detected on a fuel injector circuit for cylinders 2, 3, 5, or 8, DTCs P0202, P0203, P0205, P0208 will set, along with DTC P1262. CONDITIONS FOR RUNNING THE DTC
Attachment 50531 Attachment 50532 Attachment 50533 Attachment 50534 The numbers below refer to the step numbers on the diagnostic table. 2. This step verifies that the condition is not intermittent. 4. This step determines which set of fuel injectors the circuit condition is affecting. If DTC P1261 is set, then a condition exists on cylinders 1, 4, 6, or 7. If DTC P1262 is set, then a condition exists on cylinders 2, 3, 5, or 8. 5. This step tests if a ground is constantly being applied to the fuel injectors. 6. This step isolates which circuit is causing the condition. If the test lamp turns OFF when a multi-way connector is disconnected, test the affected circuits for a short to ground. 7. This step tests for an open circuit. If the DMM displays OL on all of the fuel injector circuits, the ignition voltage circuit is open. 8. This step tests for an open circuit. If the DMM displays OL on one of the fuel injector circuits, the fuel injector command circuit is open. 9. This step tests for excessive resistance in a fuel injector circuit. 10. This step is testing for a short between the ignition feed circuit, and the fuel injector command circuit. If the resistance of the circuits is less than 0.3 ohms , test for a short between the circuits. If a short cannot be found, the fuel injector may be the cause of the condition. The normal fuel injector resistance is between 0.3-0.4 ohms . 11. This step tests for a short to voltage on a fuel injector circuit. If the test lamp illuminates, a short to voltage is the cause of the condition. 12. This step isolates which circuit is causing the condition. If the test lamp turns OFF when a multi-way connector is disconnected, test the affected circuits for a short to voltage. 13. This step tests if a ground is constantly being applied to the fuel injectors. 14. This step isolates which circuit is causing the condition. If the test lamp turns OFF when a multi-way connector is disconnected, test the affected circuits for a short to ground. 15. This step tests for an open circuit. If the DMM displays OL on all of the fuel injector circuits, the ignition voltage circuit is open. 16. This step tests for an open circuit. If the DMM displays OL on one of the fuel injector circuits, the fuel injector command circuit is open. 17. This step tests for excessive resistance in a fuel injector circuit. 18. This step is testing for a short between the ignition feed circuit, and the fuel injector command circuit. If the resistance of the circuits is less than 0.3 Ohm, test for a short between the circuits. If a short cannot be found, the fuel injector may be the cause of the condition. The normal fuel injector resistance is between 0.3-0.4 ohms . 19. This step tests for a short to voltage on a fuel injector circuit. If the test lamp illuminates, a short to voltage is the cause of the condition. 20. This step isolates which circuit is causing the condition. If the test lamp turns OFF when a multi-way connector is disconnected, test the affected circuits for a short to voltage. |
P1261
1 Attachment(s)
CIRCUIT DESCRIPTION
The fuel injection control module (FICM) supplies high voltage to each fuel injector on the ignition voltage circuits. The FICM energizes each fuel injector by grounding the command circuit between the FICM and the fuel injector. The FICM monitors the status of the ignition voltage circuits and the fuel injector command circuits. When a fuel injector circuit condition is detected by the FICM, all of the fuel injectors on the affected ignition voltage circuit will be disabled. If a circuit condition is detected on a fuel injector circuit for cylinders 1, 4, 6, or 7, DTCs P0201, P0204, P0206, P0207 will set, along with DTC P1261. If a circuit condition is detected on a fuel injector circuit for cylinders 2, 3, 5, or 8, DTCs P0202, P0203, P0205, P0208 will set, along with DTC P1262. CONDITIONS FOR RUNNING THE DTC
The ECM detects a circuit fault related to the high voltage circuit to cylinders 1, 4, 6, and 7. ACTION TAKEN WHEN THE DTC SETS
Attachment 50530 |
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