Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

Connect one-on-one with {0} who will answer your question

This answer was rated:

I have a 320 e excavator I have a 3547-3 code voltage above…

Hey buddy I have a...
Hey buddy I have a 320 e excavator I have a 3547-3 code voltage above normal do U have the wiring schematic for this circuit it the fuel water sensor circuit which wires I jump and hat wires go ecm here pic of serial number
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 1 minute by:
8/10/2021
Mechanic: catmastertech, Technician replied 12 months ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 3,962
Experience: Field service technician for CAT 19 years.
Verified

Let me see what I can find.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 12 months ago
Ok ye just need see which wire to jump to check make sure harness is good if not need shematic to chase back to ecm
Mechanic: catmastertech, Technician replied 12 months ago

I will look but most sensors, the C pi is the signal and B is the return (ground) with A as the power.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 12 months ago
Let me know so which ones should I jump
Mechanic: catmastertech, Technician replied 12 months ago

Jump C to B and check the code to see if voltage is below normal.

Ask Your Own Construction and Road Equipment Question
Mechanic: catmastertech, Technician replied 12 months ago

It goes to the engine ECM J1 at pin 56 Blue wire marked G976

It also goes to the switch panel for the warning light.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 12 months ago
Ok I will check that
Mechanic: catmastertech, Technician replied 12 months ago

I found this testing guide, it might help.

Water-in-Fuel Sensor Operation

The WIF sensor is a normally open sensor. During normal operation, there will be no signal sent from the WIF sensor to the ECM. If water is detected in the fuel, the sensor will send a signal to the ECM. If the signal remains constant for 45 seconds, a 97-15 (E232-1) diagnostic code will become active. If the signal remains constant for 1 hour, a 97-16 (E232-2) diagnostic code will become active. These diagnostic codes can also be caused by a short in the WIF sensor circuit.

Water-in-Fuel Sensor Self Check

When the ignition keyswitch is turned to the ON position, the switch in the WIF sensor will close for 5 seconds. If the ECM does not detect a signal from the WIF sensor during this period, a 97–3 (3547-3) diagnostic code will become active.

Table 2

Troubleshooting Test Steps Values Results

1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the connector for the WIF sensor and the P1/J1 ECM connector. Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the WIF sensor.
D. Check the screw for the ECM connector for the correct torque of 6 N·m (53 lb in).
E. Check the harness for abrasions, for pinch points, and for corrosion.
Loose connection or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring harness. Ensure that all the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.

2. Check For Active Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic connector.
C. Turn the keyswitch to the ON position. If the engine will start, then run the engine.
D. Wait for at least 1 minute.
E. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.
Diagnostic codes
Result: There are no active diagnostic codes for the WIF sensor.
There may be an intermittent fault.
Repair: Refer to Troubleshooting, "Electrical Connectors - Inspect" to identify intermittent faults.
Result: A 97-15 (E232 (1)) or 97-16 (E232 (2)) diagnostic code is active.
Refer to Troubleshooting, "Fuel Contains Water" before continuing with this procedure.
Proceed to Test Step 3.
Result: A 97-3 (3547-3) diagnostic code is active.
Proceed to Test Step 3.

3. Check the Supply Voltage at the Sensor Connector
Note: Refer to the Electrical Schematic for the application to determine the sensor supply voltage.
A. Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor connector.
C. Turn the keyswitch to the ON position.
D. Measure the voltage between the sensor supply and sensor return terminals on the harness connector for the WIF sensor.
E. Turn the keyswitch to the OFF position.
Between 11 VDC and 13 VDC for a 12 VDC system.
Between 22 VDC and 26 VDC for a 24 VDC system.
Between 7.5 VDC and 8.5 VDC for an 8 VDC supply
Result: The voltage is not within the expected range. The fault is in the sensor supply wire or the return wire .
Repair: Repair the faulty sensor connector or replace the faulty harness.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The voltage is within the expected range.
Reconnect the WIF sensor to the harness. Proceed to Test Step 4.

4. Check that the Diagnostic Code is Still Active
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic connector.
C. Turn the keyswitch to the ON position. Wait for at least 1 minute.
D. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.
Diagnostic code
Result: A 97-3 (3547-3) diagnostic code is active.
Proceed to Test Step 5.
Result: A 97-15 (E232 (1)) diagnostic code is active.
Proceed to Test Step 7.
Result: No diagnostic code is active.
Return the unit to service.

5. Create a Short Circuit at the Sensor Connector
A.Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor from the harness.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Use the jumper to connect the sensor signal terminal to the sensor return terminal on the harness connector for the WIF sensor.
E. Turn the keyswitch to the ON position. Wait for at least 1 minute.
F. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.
Open circuit
Result: A 97-3 (3547-3) diagnostic code was active before installing the jumper. A 97-15 (E232 (1)) code was active with the jumper installed. There is an open circuit in the WIF sensor.
Repair: Install a replacement sensor. Refer to Disassembly and Assembly, "Water Separator and Fuel Filter (Primary) - Remove and Install" for the correct procedure.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: There is still an active 97-3 (3547-3) diagnostic code with the jumper installed. The sensor is OK.
Proceed to Test Step 6.

6. Check the Harness for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the water-in-fuel sensor and P1 connector.
C. Use a multimeter to check the resistance of the sensor signal wiring between the sensor connector and the P1 connector.
Note: Refer to the Electrical Schematic for the application for the correct terminals.
D. Install the removed connectors.
Less than 2 Ohms.
Result: The measured resistances are greater than 2 Ohms. There is an open circuit in the harness.
Repair: Repair the sensor connector or replace the harness.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The measured resistance is less than 2 Ohms. There may be a short circuit in the harness.
Proceed to Test Step 7.

7. Create an Open Circuit at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor from the harness.
C. Turn the keyswitch to the ON position.
D. Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes.
Short circuit
Result: A 97-15 (E232 (1)) diagnostic code is active with the WIF sensor connected. A 97-3 (3547-3) diagnostic code was active after disconnecting the WIF sensor. There is a short in the WIF sensor.
Install a replacement sensor. Refer to Disassembly and Assembly, "Water Separator and Fuel Filter (Primary) - Remove and Install" for the correct procedure.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The 97-15 (E232(1)) diagnostic code is still active with the WIF sensor disconnected. The WIF sensor is OK.
Proceed to Test Step 8.

8. Check the Harness for a Short Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the WIF sensor from the harness. Disconnect the P1 connector.
C. Use a multimeter to measure the resistance between the WIF sensor signal terminal on the P1 connector and all other terminals on P1.
D. Reconnect the WIF sensor to the harness. Reconnect the P1 connector.
Greater than 100 Ohms
Result: The measured resistances are less than 100 Ohms. There is a short in the harness.
Repair: Repair the faulty sensor connector or replace the faulty harness.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The measured resistance is greater than 100 Ohms. There is a fault in the ECM.
Contact the Dealer Solutions Network (DSN).

Ask Your Own Construction and Road Equipment Question
Customer reply replied 12 months ago
Can u send me the wiring diagram there two other wires
Customer reply replied 12 months ago
I have community to the pin 56
Mechanic: catmastertech, Technician replied 12 months ago

I am sorry, the file is too big and I am not allowed to share copyrighted documents per site policy.

Does it change to a -4 code (voltage below normal) when the signal shorted to the ground (2) pin? If not, when reading the power and ground do you have the correct voltage? (1-to-2 pin)

Ask Your Own Construction and Road Equipment Question
Customer reply replied 12 months ago
No
Mechanic: catmastertech, Technician replied 12 months ago

Sorry for the late reply, had to run and errand.

I would remove the wire from the ECM and ground the return wire directly at the ECM, that should force the ECM to see a below normal voltage. If it does not, the ECM may be the fault.

Ask Your Own Construction and Road Equipment Question
Mechanic: catmastertech, Technician replied 12 months ago

The 147 purple (+battery key on fuse) is fuse #35 in the panel. It should send battery voltage to the sensor.

Ask Your Own Construction and Road Equipment Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask catmastertech Your Own Question
catmastertech
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 3,962
3,962 Satisfied Customers
Experience: Field service technician for CAT 19 years.

catmastertech is online now

Related Construction and Road Equipment Questions
I'm working working on a CAT 336 excavator and the AC
I'm working working on a CAT 336 excavator and the AC condenser fan won't kick on. And high pressure is about 350psi.Fan fuse,relay and fan it's self are all good but fan won't turn on.Any help would … read more
PAPA Chris
PAPA Chris
Field Service Technician
Automotive Technology
35 satisfied customers
Buddy have a d10 dozer serial jjw00197 has a code 3409-5 can
Hey buddy have a d10 dozer serial jjw00197 has a code 3409-5 can u tell me where it is located… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Gm how are u u have d10t2 serial jjw00197 I have exhaust
Gm how are u u have d10t2 serial jjw00197 I have exhaust temp code voltage above normal here a pic of codes would u know what wires I should check or a schematic for the exhaust temp sensors here code… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a 2008 cat 262C. hydraulics all work, reverse works
Hello, i have a 2008 cat 262C. hydraulics all work , reverse works but goes into alarm when the joystick is set to forward operation … read more
MitchellF415
MitchellF415
Heavy duty mechanic
Red seal certification
18 satisfied customers
Hei, har en komatsu wa 320 - 1 1990 mod. har mistet langlys
hei, har en komatsu wa 320 - 1 1990 mod. har mistet langlys og nærlys, men e har strøm i ledning merket rød og grønn, ka e feilen . har du koblingsskjema. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,190 satisfied customers
How are u I have a cat 926m loader serial lte03596 have
How are u I have a cat 926m loader serial lte03596 have intermittent code 2993-3 amd e 1357 how I start troubleshooting this Idk what wires go to ecm wanted check then and which ecm is it diagram woul… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a cat excavator serial number tfx00790 320elrr has a
I have a cat excavator serial number tfx00790 320elrr has a code 732-5 voltage i was wondering if u have a schematic fir this I thino I was gona jump the solenoid to see if code changes I think that w… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a Catapillar to 46D skid steer that is coming up with
I have a Catapillar to 46D skid steer that is coming up with an alarm that says number two number three injectors below voltage alarm what does that mean … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a Cat d6n lgp, the hydraulic and transmission gauges
I have a Cat d6n lgp, the hydraulic and transmission gauges are at the top temp when the keys is turned on and the park brake light does not come on. the engine wont crank because of this. have you an… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a 312 caterpillar excavator and the electronic
I have a 312 caterpillar excavator and the electronic monitor panel doesn't turn on and blinks… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Codes 030 96.03, 030 271.05, 079 136.08, 079 137.08,
codes 030 96.03, 030 271.05, 079 136.08, 079 137.08, 079299.13. cat 953c serial# ***** … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
2014 Cat 262D Skid Steer is displaying fault code 2474-3
2014 Cat 262D Skid Steer is displaying fault code 2474-3 "Left joystick forward/reverse position sensor voltage above normal. … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a bobcat 334G mini excavator. I was working on a
Hi, I have a bobcat 334G mini excavator. I was working on a slope the past weekend and while I was cutting in a new road the excavator made 3 audible beeps and then the engine shut off. The Red exclam… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,190 satisfied customers
I HAVE A CATERPILLAR EXCAVATOR 324D. I PUT THE ET AND HAVE
I HAVE A CATERPILLAR EXCAVATOR 324D. I PUT THE ET AND HAVE THE CODES: 268-2 PROGRAMMED PARAMETER FAULT: ERRATIC, INTERMITTENT OR INCORRECT. 1785-3 INTAKE MANIFOLD PRESSURE SENSOR: VOLTAGE ABOVE NORNAL… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
I need to know the procedure to calibrate the governor actuator
I need to know the procedure to calibrate the governor actuator on a Cat 320l excavator I've changed out the actuator and now need to calibrate the ecm… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Cat d5n parking brake will not release, have to jump solenoid
Cat d5n parking brake will not release, have to jump solenoid on starter to start, once running parking brake will not release… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Hello, I have a 320 Cat/Favco 30 ton. Unable to swing. Engine loads up when trying to swin
Hello, I have a 320 Cat/Favco 30 ton. Unable to swing. Engine loads up when trying to swing. I've located four solenoid valves located on pilot system near pump. I've also located solenoid valve on sw… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Hi, im Daniel, I need schematic electrical diagram for cat
Hi, i'm Daniel, I need schematic electrical diagram for cat excavator 320. I'm working on the cat excavator 320 and the problem it has is that, when I raise throttle control, when the engine accelerat… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
3,962 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Curtis B.

Curtis B.

Technician

2,324 satisfied customers

Technican turned service manager with multiple lines of equipment and rental units.

Wayne

Wayne

Journeyman

1,298 satisfied customers

worked on many road graders, Bull dozers , skid steers, Rollers

Cat Man

Cat Man

Cat Engine Expert

578 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

299 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

85 satisfied customers

24 years of experience diagnosing & repairing

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

JBFixxer

JBFixxer

Mechanic

22 satisfied customers

16+ years experience, hydraulics,hydrostatics, engines, fuel injection systems. And everything in between.

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x