seadoo gtx ibr issues gen 1 C0073 fault code

[Alexpip]

hi,
i have issues with my seadoo gtx 255 2009 ibr gen 1 in accessory mode i can override the ibr and it works but when i start up jetski i get fault code c0073 try to look everywhere for answers but i can't find a good answer. I have come across that it could be low voltage on battery which i have so im waiting to get a new battery but im just wondering if anyone has had this problem and found a fix for it.

 

[mkov608]

Here is the C0073 fault code description from the manual.



CPS is the crankshaft position sensor.

I had a friends 2013 RXT X 260 in the shop and it was throwing all sorts of codes. At one point the computer even set the C0073 code. After troubleshooting with a lab scope ....

We replaced the IBR module. After the IBR module replacement, our network signals looked good again, and the IBR worked perfectly, but the ECU started setting throttle codes. We isolated that to one faulty throttle position sensor (TPS); there are two TPS sensors in the throttle body. We replaced the throttle body with an inexpensive unit from Ebay; the ski has been running perfectly ever since we changed the throttle body.

Sea-Doo Throttle Body 420892590 420892592 420892591 RXP GTR GTX GTI RXT seadoo | eBay

Here is a list of the codes we were getting as we performed troubleshooting. There was a big delay in troubleshooting because it took 3 months to get a new IBR module.

P062C (Internal fault in ECU)
P1661 (IBR Fault)
U0129 (Can fault between iS and IBR, but there’s no iS on this ski)
U0401 (Can circuit failure; ecm software failure)
B2200

Cleared codes and rode again on 31 Jul; here are the codes set that day.

P062C
U0129
P1661
C0073
U0401

31 Oct 24: New IBR Module installed and married to ECU.

Faults in memory (cleared)

P062C
P1611
P1614
P1615
P160E
U0129
P1661
B2200
U0401

P1611, P1614, P1615, an P160E are new faults.
P160E = Throttle Actuator: controller fault: digital position control below limit
P1611 = Throttle Actuator: power stage fault
P1614 = Throttle Actuator: Return spring check not passed; spring does not close
P1615 = Throttle Actuator: Position monitoring fault

7 Nov faults

P062C
U0129
P1661
U0401
C2316
C2334

12 Nov 3 new faults (all tps)

P1120
P212C
P2620

 

[Alexpip]

so c0073

Here is the C0073 fault code description from the manual.

View attachment 67170

CPS is the crankshaft position sensor.

I had a friends 2013 RXT X 260 in the shop and it was throwing all sorts of codes. At one point the computer even set the C0073 code. After troubleshooting with a lab scope ....

We replaced the IBR module. After the IBR module replacement, our network signals looked good again, and the IBR worked perfectly, but the ECU started setting throttle codes. We isolated that to one faulty throttle position sensor (TPS); there are two TPS sensors in the throttle body. We replaced the throttle body with an inexpensive unit from Ebay; the ski has been running perfectly ever since we changed the throttle body.

Sea-Doo Throttle Body 420892590 420892592 420892591 RXP GTR GTX GTI RXT seadoo | eBay

Here is a list of the codes we were getting as we performed troubleshooting. There was a big delay in troubleshooting because it took 3 months to get a new IBR module.

P062C (Internal fault in ECU)
P1661 (IBR Fault)
U0129 (Can fault between iS and IBR, but there’s no iS on this ski)
U0401 (Can circuit failure; ecm software failure)
B2200

Cleared codes and rode again on 31 Jul; here are the codes set that day.

P062C
U0129
P1661
C0073
U0401

31 Oct 24: New IBR Module installed and married to ECU.

Faults in memory (cleared)

P062C
P1611
P1614
P1615
P160E
U0129
P1661
B2200
U0401

P1611, P1614, P1615, an P160E are new faults.
P160E = Throttle Actuator: controller fault: digital position control below limit
P1611 = Throttle Actuator: power stage fault
P1614 = Throttle Actuator: Return spring check not passed; spring does not close
P1615 = Throttle Actuator: Position monitoring fault

7 Nov faults

P062C
U0129
P1661
U0401
C2316
C2334

12 Nov 3 new faults (all tps)

P1120
P212C
P2620

so cps and cts would be the problem for the code c0073 or would it also be the module ive been a lot of mixed comments on what it could be so trying to get to the bottom of it before i spend big money and buy a brand new ibr.

 

[mkov608]

Understand. Be careful of BRPs troubleshooting steps in their manual. They are not the best, and they aren't updated to incorporate real-world troubleshooting from dealer or independent shop technicians. For each ski, faults have to be isolated.

To check the CPS, you really need a lab scope to make sure you've got a good signal from the sensor; it's a variable reluctance sensor VRS. While cranking the engine in flood crank mode, the signal should look like this:



To check the CTS; you can remove it, put it in the freezer, check the resistance, and then put it in boiling water, and check the resistance again; compare the resistance vrs temperature to the values listed in the service manual.

Wiring can also be a problem, so you have to make sure you have good continuity between the sensor or component and the ECU with no shorts to power or ground. On the older skis, BRP put the IBR module in a terrible place, and a lot of owners don't take proper care of their skis so the IBR takes a beating from corrosion both externally and sometimes on the electrical connections.

 

[Alexpip]

ok perfect thank you

Understand. Be careful of BRPs troubleshooting steps in their manual. They are not the best, and they aren't updated to incorporate real-world troubleshooting from dealer or independent shop technicians. For each ski; faults have to be isolated.

To check the CPS, you really need a lab scope to make sure you've got a good signal from the sensor; it's a variable reluctance sensor VRS. While cranking the engine in flood crank mode, the signal should look like this:

View attachment 67171

To check the CTS; you can remove it, put it in the freezer, check the resistance, and then put it in boiling water, and check the resistance again; compare the resistance vrs temperature to the values listed in the service manual.

Wiring can also be a problem, so you have to make sure you have good continuity between the sensor or component and the ECU with no shorts to power or ground. On the older skis, BRP put the IBR module in a terrible place, and a lot of owners don't take proper care of their skis so the IBR takes a beating from corrosion both externally and sometimes on the electrical connections.

ok perfect thank you for helping me understand. just have a question if cps was bad wouldn't it not let me start the jetski or turn over according to the manual? cause it lets me start thats why im thinking it could be the module or low voltage cause i had started it hooked up my muti-meter to the incoming ibr power and when it started i was only getting 8 volts so im waiting for new battery. the CTS i unplugged it from the harness and it gave me a fault and re pluuged it and the fault went away so would that mean the cts would be working? being pulling my hair out trying to isolated and get to the bottom but hopefully i will have more answers when my battery comes in.

 

[mkov608]

Not always; I purchased my 2017 GTR 230 used; when I went for the initial test ride, the ski ran like crap (but it ran), and I immediately went back to the boat ramp; I looked at the owner and said. "There's something wrong." I got it to my shop, and there no code on the information center, but there was a code in memory for the CPS when I connected my CanDoo Pro; I put the scope on the ski and confirmed the sensor was bad, but the ski would still run. The ski ran great after replacing the sensor.

What is your battery voltage, CCA rating, and actual CCA? Yes, low battery voltage can cause all sort of problems.

That's a good alternative to checking the resistance of the CTS, but you still don't know if the sensor is in range based on temperature; the sensor could be fine at one point in the scale, but fall out of range at the upper or lower end of the scale. It's best to check it as I described.

 

[Alexpip]

update!!

replace new battery and charging system getting 12v now at ibr power which is a good start, i have ordered new cts and cps and just gonna replace mine, my next step is gonna test each cable going from ibr to cluster for control for shorts , cts and cps going back to ecm for shorts if no luck not sure what my next step either spend $$ or try and sell it

Not always; I purchased my 2017 GTR 230 used; when I went for the initial test ride, the ski ran like crap (but it ran), and I immediately went back to the boat ramp; I looked at the owner and said. "There's something wrong." I got it to my shop, and there no code on the information center, but there was a code in memory for the CPS when I connected my CanDoo Pro; I put the scope on the ski and confirmed the sensor was bad, but the ski would still run. The ski ran great after replacing the sensor.

What is your battery voltage, CCA rating, and actual CCA? Yes, low battery voltage can cause all sort of problems.

That's a good alternative to checking the resistance of the CTS, but you still don't know if the sensor is in range based on temperature; the sensor could be fine at one point in the scale, but fall out of range at the upper or lower end of the scale. It's best to check it as I described.

 

[mkov608]

I would not recommend replacing components (CPS & CTS sensors) just because they are listed in the BRP troubleshooting chart. I have seen new components that were bad right out of the box. Installing a new part (even an OEM version) may induce problems that weren't there before and potentially send you in the wrong direction.