2003 Sorento Cruise Control Not Engaging-Please Help!
Discussion
Hello
I've bought a 2003 Kia Sorento 2.5 CRDi XS Auto and I have a problem with my cruise control.
When I press on/off button (on the right side in the dashboard), the indicator 'CRUISE' comes on in the speedometer panel. When I press 'SET' on the steering wheel to cruise ( 'SET' light supposed to come on as well??), nothing happens - I let the accelerator pedal free, the speed went down like the cruise never been activated. But after hitting 50 and above, it got turned off itself and wouldn't turn on back again. I had to pullover on hard shoulder and turn off the ignition to turn cruise on back again. Each time I hit 50, it turns off!
I've tried the steering wheel connection with a multimeter and it all works fine. So I took my Sorento to the dealer and updated the ECU software. It took around 45mins to complete the process (~£56 incl VAT). Then I took it for a test drive, the cruise control still wouldn't set and turns off when the speed reaches 50mph. They also ran a DTC check, found no error codes. I'm just stuck here. I've done all the checks, electrical connection, brake light switch and speed/ABS sensors but to no avail!
Has anyone had a similar issue with your car and how did you get it sorted?
Theres no accelerator linkage, so all electronically controlled as I can see wires connected to the accelerator pedal base. The last place I can check is the accelerator sensor at throttle body (?), but I don't know where it is located (can anyone share a pic?) OR there is a pedal position sensor at the base of the accelerator pedal?
I would highly appreciate any help on this.
Thanks!
I've bought a 2003 Kia Sorento 2.5 CRDi XS Auto and I have a problem with my cruise control.
When I press on/off button (on the right side in the dashboard), the indicator 'CRUISE' comes on in the speedometer panel. When I press 'SET' on the steering wheel to cruise ( 'SET' light supposed to come on as well??), nothing happens - I let the accelerator pedal free, the speed went down like the cruise never been activated. But after hitting 50 and above, it got turned off itself and wouldn't turn on back again. I had to pullover on hard shoulder and turn off the ignition to turn cruise on back again. Each time I hit 50, it turns off!
I've tried the steering wheel connection with a multimeter and it all works fine. So I took my Sorento to the dealer and updated the ECU software. It took around 45mins to complete the process (~£56 incl VAT). Then I took it for a test drive, the cruise control still wouldn't set and turns off when the speed reaches 50mph. They also ran a DTC check, found no error codes. I'm just stuck here. I've done all the checks, electrical connection, brake light switch and speed/ABS sensors but to no avail!
Has anyone had a similar issue with your car and how did you get it sorted?
Theres no accelerator linkage, so all electronically controlled as I can see wires connected to the accelerator pedal base. The last place I can check is the accelerator sensor at throttle body (?), but I don't know where it is located (can anyone share a pic?) OR there is a pedal position sensor at the base of the accelerator pedal?
I would highly appreciate any help on this.
Thanks!
Clearly its DBW so there will be no cruise wires relating to pedal or throttle. It will all be ecu controlled.
Reasons to not engage could be many, brake pedal switch, clutch pedal switch, other ?
Whether proper ecu scanner will allow you to see all these inputs or not for test, no idea. You'd think a dealer level should, but it's an old car so maybe not.
Reasons to not engage could be many, brake pedal switch, clutch pedal switch, other ?
Whether proper ecu scanner will allow you to see all these inputs or not for test, no idea. You'd think a dealer level should, but it's an old car so maybe not.
Tyres are all almost new, but I don't think its anything to do with tyres.
I do have the manual but it doesn't say anything about CC troubleshooting.
DBW explains it but when the dealer did a DTC check, it didn't show anything. Agreed, it's not worth spending huge money on a 15 year old car, but I'll give a shout to the dealer and see what they gonna come up with with to do a ECU check for CC readings etc.
I initially started everything form the diagram below...
I do have the manual but it doesn't say anything about CC troubleshooting.
DBW explains it but when the dealer did a DTC check, it didn't show anything. Agreed, it's not worth spending huge money on a 15 year old car, but I'll give a shout to the dealer and see what they gonna come up with with to do a ECU check for CC readings etc.
I initially started everything form the diagram below...
Odd layout and what the hell is a Cancle switch ?
It could be any one aspect on that drawing not correct or a combination of multiple.
And whether any ecu check from a dealer will show anything...depends exactly what they did check..and what they are able to check.
The chances of showing a fault on a basic engine ecu check are very unlikely as generally that would be a subsystem, as most engine ecu related checks are emissions etc based one way or another.
But who knows what some manufacturers do.
It could be any one aspect on that drawing not correct or a combination of multiple.
And whether any ecu check from a dealer will show anything...depends exactly what they did check..and what they are able to check.
The chances of showing a fault on a basic engine ecu check are very unlikely as generally that would be a subsystem, as most engine ecu related checks are emissions etc based one way or another.
But who knows what some manufacturers do.
This is actually from an American website and is referring to 3.5 petrol Sorentos. What I understand from the diagram is, that 'cancel switch' is referring to all the switches in the car that would cancel the CC when used, like when the CRUISE switch is turned off (cancel), it cancels the CC.
As you said its DBW system that controls the CC, there won't be any need to check the throttle body? I can see some wires in the diesel injector but nothing on the EGR
As you said its DBW system that controls the CC, there won't be any need to check the throttle body? I can see some wires in the diesel injector but nothing on the EGR
Edited by zakmuh on Wednesday 14th June 11:44
Chances are it's one of the sensors, possibly the transmission sensor if it's speed-specific and you don't get any traction control/ABS oddities...
Have you had the car on a Kia-specific diagnostic machine? i.e. not just standard OBD2 codes, but the manufacturer-specific codes. That will likely tell you what the issue is, if not it'd be worth doing live datalogging with a laptop connected when it happens.
Have you had the car on a Kia-specific diagnostic machine? i.e. not just standard OBD2 codes, but the manufacturer-specific codes. That will likely tell you what the issue is, if not it'd be worth doing live datalogging with a laptop connected when it happens.
Hopefully the user manual tells you what the normal behaviour is. Is that different to what you're getting here?
Assuming this behaviour is abnormal (rather than just user following the incorrect procedure to use CC) you could start diagnosing it by looking for the six switches shown in that diagram and check that they are all electrically working correctly.
If any of the switches are normally-closed, also see if you can locate the CC control unit and check continuity through the loom+switch, since a wiring fault would usually make the switch look open.
Assuming this behaviour is abnormal (rather than just user following the incorrect procedure to use CC) you could start diagnosing it by looking for the six switches shown in that diagram and check that they are all electrically working correctly.
If any of the switches are normally-closed, also see if you can locate the CC control unit and check continuity through the loom+switch, since a wiring fault would usually make the switch look open.
Thanks for your reply.
I've checked all the CC related switches for continuity- found no issues. I don't think my car has a CC module as it has DBW (drive-by-wire ) throttle system, hence controlled by the ECU (or ECM). The above diagram I followed as a guidance only, for checking switches and connections.
I think I should get the speed sensor out (speedometer sleeve), give it a good cleaning with electrical contact cleaner and check for it's required pulse voltage again and see what happens then.
https://kia.7zap.com/en/eur/sorento/eurk3e002a/vin...
I've checked all the CC related switches for continuity- found no issues. I don't think my car has a CC module as it has DBW (drive-by-wire ) throttle system, hence controlled by the ECU (or ECM). The above diagram I followed as a guidance only, for checking switches and connections.
I think I should get the speed sensor out (speedometer sleeve), give it a good cleaning with electrical contact cleaner and check for it's required pulse voltage again and see what happens then.
https://kia.7zap.com/en/eur/sorento/eurk3e002a/vin...
zakmuh said:
Steveiturbo, I thought so but CRUISE light turns off when it hits 50 - so this is something to do with speed input, isn't it?
reenV8S, I couldn't find any info with regards to a CC control module and I was told it's all controlled by ECU.
Well if it does it at exactly 50mph all the time....then it must be getting a speed reading from somewhere in order to achieve that, otherwise it could not be at the exact same speed.reenV8S, I couldn't find any info with regards to a CC control module and I was told it's all controlled by ECU.
Yes each time, as soon as the speed mph hand reaches 50 in the speedometer, it happens.
ABS is working. Dealer checked the ABS sensor reading while the computer connected to the car - on stationary it read 0.9 and with wheels rotating, it kept increasing. So sensors are working okay.
Input and output sensors on the gearbox reading were okay as well.
Did you say theres no throttle body for diesel engine? Just wondering if any vacuum hoses disconnected/leaking?
ABS is working. Dealer checked the ABS sensor reading while the computer connected to the car - on stationary it read 0.9 and with wheels rotating, it kept increasing. So sensors are working okay.
Input and output sensors on the gearbox reading were okay as well.
Did you say theres no throttle body for diesel engine? Just wondering if any vacuum hoses disconnected/leaking?
Edited by zakmuh on Thursday 15th June 14:00
Edited by zakmuh on Thursday 15th June 20:58
Hello,
I carried out the speed sensor voltage check again today and got these results as shown in the pics below. 0.37v showign when all the wires are connected to the sensor without rotating it. 0.64v showing when the sensor is attached to the drill and rotating to its full speed.
In the diagram above it tells the pulse voltage should be between 0 - 5V. Should I expect the sensor to read 5V? Then 0.64V reading isn't enough - sensor is faulty?
Cheers
I carried out the speed sensor voltage check again today and got these results as shown in the pics below. 0.37v showign when all the wires are connected to the sensor without rotating it. 0.64v showing when the sensor is attached to the drill and rotating to its full speed.
In the diagram above it tells the pulse voltage should be between 0 - 5V. Should I expect the sensor to read 5V? Then 0.64V reading isn't enough - sensor is faulty?
Cheers
If I am reading you correctly you are saying you are spinning the abs sensor in a drill!
Why?
That is not how they work. They measure EM pulses relative to the speed of a castellated ring on the wheel hub, switching between 5v & 0v generally.
Or are these really that different from normal abs sensors?
Why?
That is not how they work. They measure EM pulses relative to the speed of a castellated ring on the wheel hub, switching between 5v & 0v generally.
Or are these really that different from normal abs sensors?
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