G/box: 70 Auto: - Recurring "Input shaft speed sensor" fault

jr09_50 · Apr 4th, 2011, 21:11

V70 2.5TDi Auto - 1999. Help! Flashing arrow followed by ECU light. Trans Fault code indicated "Input shaft speed sensor" faulty - replaced it. OK for a few days - then lights all came on again. Checked codes again & cleared - still same fault indicated. Checked LH Front ABS ring clean (road speed sensed from here). Everything appears to be working correctly, but clearly something is causing the fault code to be generated. Anyone got any idea where else to look please? Oh - lights all on again!!

Chris_Rogers · Apr 5th, 2011, 17:16

Have you looked at the wiring?

Have you actualy replaced the input speed sensor, this tansmission has two sensors input and output speed which look the same, they are both light blue from memory.

jr09_50 · Apr 5th, 2011, 17:25

Definitely replaced input speed sensor - unless Volvo specialist got it wrong! Also checked multiplug onto trans ECU & as best as rest of loom for general condition - seems OK. I know there could be a broken wire, but in fairness everything appears to be working OK - even torque converter lock up which usually stops if sensor faulty.

Chris_Rogers · Apr 5th, 2011, 17:35

Found this, shows the speed sensor location.

http://www.transtec.com/tech_insert/94659.pdf

jr09_50 · Apr 7th, 2011, 20:25

Hi Chris & thanks for the info - you know what - looks like the Volvo specialist got it wrong - the sensor he ID'd as input from his info is labelled as output on the info you sent. I printed it off & will be paying another visit - as he is a colleague I will try not to be too grumpy - we all make mistakes! I checked the plate on the box & it is as shown in the PDF!
Fingers crossed we'll get the right one this time!

Apr 4th, 2011, 21:11	#1
jr09_50 New Member Last Online: Sep 8th, 2012 17:51 Join Date: Feb 2007 Location: Faringdon	Recurring "Input shaft speed sensor" fault V70 2.5TDi Auto - 1999. Help! Flashing arrow followed by ECU light. Trans Fault code indicated "Input shaft speed sensor" faulty - replaced it. OK for a few days - then lights all came on again. Checked codes again & cleared - still same fault indicated. Checked LH Front ABS ring clean (road speed sensed from here). Everything appears to be working correctly, but clearly something is causing the fault code to be generated. Anyone got any idea where else to look please? Oh - lights all on again!!

Apr 5th, 2011, 17:16	#2
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Have you looked at the wiring? Have you actualy replaced the input speed sensor, this tansmission has two sensors input and output speed which look the same, they are both light blue from memory.

Apr 5th, 2011, 17:25	#3
jr09_50 New Member Last Online: Sep 8th, 2012 17:51 Join Date: Feb 2007 Location: Faringdon	Definitely replaced input speed sensor - unless Volvo specialist got it wrong! Also checked multiplug onto trans ECU & as best as rest of loom for general condition - seems OK. I know there could be a broken wire, but in fairness everything appears to be working OK - even torque converter lock up which usually stops if sensor faulty.

Apr 5th, 2011, 17:35	#4
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Found this, shows the speed sensor location. http://www.transtec.com/tech_insert/94659.pdf

Apr 7th, 2011, 20:25	#5
jr09_50 New Member Last Online: Sep 8th, 2012 17:51 Join Date: Feb 2007 Location: Faringdon	Hi Chris & thanks for the info - you know what - looks like the Volvo specialist got it wrong - the sensor he ID'd as input from his info is labelled as output on the info you sent. I printed it off & will be paying another visit - as he is a colleague I will try not to be too grumpy - we all make mistakes! I checked the plate on the box & it is as shown in the PDF! Fingers crossed we'll get the right one this time!

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