How to tell if a fault is an open circuit?
This is our first indication that the fault is an open circuit fault. You should check the voltage on wire #1 at the bottom of the control fuse and X2 at the top of the neutral link. You should check the voltage on wire #1 at the bottom of the control fuse and wire #2 on the bottom of the neutral link.
When is a problem in the control circuit?
If correct voltage is not present, then the problem is in the power circuit. If correct voltage is present and the contactor is energized, then the problem is in the power circuit. If correct voltage is present, the contactor is not energized and the OL is not tripped, then the problem is in the control circuit.
Where is Bank 1 located on a catalytic converter?
The Bank 1 portion of the code refers to the side where the #1 cylinder is located. There are two O2 sensors in your vehicle. The sensor located before the catalytic converter is the upstream sensor, also known as Sensor 1. The one after the catalytic converter, which is the downstream sensor, is Sensor 2.
How to tell if a control circuit fuse is open?
You should check the voltage on X1 at the top of the control circuit fuse and X2 at the top of the neutral link. If the correct voltage is present, continue to Step 6. If the correct voltage is not present, then X2 wire is open from the top of the neutral link to the terminal on the secondary of the transformer.
How to troubleshoot an open circuit fault in the control?
The fault could also be many different types, such as, open circuit fault, short circuit fault or a ground fault. This general troubleshooting procedure is designed to start in the middle of the problem area and give us the best idea which direction to go.
What causes a VTEC system to malfunction?
NOTE: While there are some exceptions, the general rule is that if the code sets at, or just above idling speeds, the fault is caused by a general electrical issue, while if the code sets above about 4000 RPM, the fault almost invariably involves insufficient oil pressure, or a failure of the VTEC oil pressure sensor. None found.
What does too lean off idle bank 1 mean?
Specifically, the PCM is detecting a lean condition which means too much air in the air/fuel ratio. This code is set for Bank 1, which is the bank of cylinders that includes cylinder number 1.
Why is my PCM throwing a trouble code?
The problem can also be caused by a faulty PCM or ECM inaccurately throwing the code. Although there are a few possible causes of the code, it is a relatively-specific error. This can make the diagnostic process a little easier compared to some other diagnostic trouble codes.