I have replaced the Sensor on the Crank but still have a Code P0335
I have confirmed the two wires on the outside of the connector to PCM, no broken circuit. Center wire on this connector has continuity to ground.
Is Code on this vehicle referring to the sensor in the Distributor?
What is the test procedure for this sensor?
Anyone with a Wiring Schematic for this car?
The car runs with this sensor disconnected.

Sensor Connector below Intake. (Sensor has been replaced)

 

That plug is for the CKF (Crankshaft Fluctuation Sensor) and NOT your CKP (Crank Position Sensor). The CKP is found inside your distributor.

 

Thanks for the Reply.,

2nd Question- What is the diagnostic test for the sensor inside the distributor?
Do you have wiring schematic for this circuit?

Bruce

 

Use a multimeter to measure resistance (Ohms) between the two CKP wire pins (C8, Blu wire; C9, Wht wire) in the unplugged ECU connector. If you read 350-700 Ohms, then test each wire individually for a short to ground.

 

Looking for a Connector Pinout clarification
Is the C connector Blue? On the blue connector there is a white in Pin 2 and blue on pin 3 with no continuity between them and open to ground on both.
3 Grey connectors, none have white and blue on pin 8 & 9

Anyone have PCM Pinout with Pin orientation Chart and circuit description?

 

The ECM/PCM connectors are in alpha order from left to right (A, B, C, D). Yes, Connector C is blue.

You're reading the wire terminal pins incorrectly. For a female connector, the terminal numbering is from the wire side. Those are terminal no. 8 and 9, not 2 and 3.

 

I was referencing numbering on the back of the connector. It appeared to be indicative showing 1 on the top right and 11 on the top left. But without a diagram it is difficult to confirm.
So if I read no continuity between these two wires, the sensor circuit is open, Sensor in the Distributor has failed? Or broken wires to the distributor?
Is this sensor replaceable? or do we have to change the distributor?
Bruce

 

1. It would be unusual for both wire to have no continuity, which indicates an open (break). Are you checking the wires for continuity between connector C120 (from distributor) to the Connector C?

If there was an open in the wires from the continuity test, it would not test the sensor in the distributor since Connector C120 would normally be disconnected to check continuity.

2. Generally, to test the CKP sensor, you would measure the resistance at the distributor CKP sensor wires to see if there was 350-700 Ohms. Sensor terminal no. 2 (Lt Blu wire) and terminal no. 6 (Blu/Yel wire).




If the sensor was faulty, the distributor or distributor housing would be replaced. The sensor is part of the distributor housing; the sensor generally is not replaceable.

 

I disconnected the harness from the PCM as well as from the distributor. Checked both the white wire and blue wire from Dist Conn to PCM Conn. NO short to ground, no short to each wire and no resistant on each wire. Good continuity (0 Ohms). With harness connected to PCM only, there is 1 ohm to ground on the white wire circuit. Is this supposed to be grounded? or is there a problem inside the PCM?
Checked the CKP Circuit on the Distributor, 402 ohms. Appears to be okay.
What else could be causing my P0335 code?

 

Reconnect the distributor connector to the wire harness and again unplug ECU connector C. Measure resistance (Ohms) rather than continuity between pins C8 and C9? What is the Ohm reading?

Next test for continuity to body ground at each pin, and post the results.

 

In my latest test, I reconnected the distributor grey connector, disconnected Connector C from the PCM and measured the resistance between the white & blue. I get 388 ohms.
Testing each circuit to ground, I confirm they are both good. No short to ground. ( My previous test of this circuit was incorrect where I showed and open. I don't think my test leads were connecting the pins.)d

Still getting the check engine light P0355. In a previous test, I measured 1 ohm to ground on the white wire when I checked it at the distributor end. Blue Connector C was connected to PCM and unplugged from the distributor.

 

Source a replacement ECU.

 

Are you suggesting the white wire, C9 being grounded internally is the issue?
Do you have a pinout diagram for this engine?

 

Your electrical test results rule out everything P0335-related except the ECU.

 

Okay- Thank you very much for sticking with me thru this diagnosis.
I appreciate it.
Once I find an ECU I will follow up.
Do you know if the ECU need to be flashed to VIN Match with the car?

 

What Civic trim (CX, DX. LX, EX, HX, Si), engine (Y7, Y8, Y5, B16A2)), transmission (M/T, A/T), and current ECU (P2E, P2P, P2N, P2T)?

 

It's 2000 Civic 1.6L SI ECU is P2P, 8th digit of VIN is 7 (Engine Code) Automatic Transmission

 

Buy a 99-00 Civic P2P ECU for an A/T transmission. I recommend shopping on eBay because as a buyer you are protected. If ECU is bad, return for full refund or a replacement.

 

I have found a "known good" PCM. Installed to the car. Retested the vehicle and got the same P0335 code. I doubted there would be 2 PCMs with the same issue so I then reinstalled the original PCM.
I installed a "known good" Distributor and my Code P0335 is now cleared and does not return. Successful driving, good acceleration, shifting of the transmission is much better.
I disconnected Connector C from the PCM and measured the resistance between the white & blue with the replaced Distributor and now I get 449 ohms.
Hope this makes sense and is helpful to others with this issue.
Thank you to all who engaged and pointed me in this direction.