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Discussion Starter · #1 ·
My VSC Trac, Slip Indicator, and VSC OFF indicators are stuck on, I jumped the ODB connector and got code 34, which points to left rear wheel abs speed sensor. Anyone have this happen before?

The replacement part is not cheap, checking if anyone had a similar problem and if they sucked it up or had another solution.
 

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If it's calling the sensor then you may be screwed, I'd get under there and try and unplug it, clean the contacts and plug it in again, clear the code and see if it comes back.
Have you done any work back there lately or gone wheelin where it could of been hit?? If not you could try and warranty it.



 

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Discussion Starter · #4 ·
lights came on while driving on the highway, nothing rough offroad to speak of, had it aligned, unplugged the sensor, cleaned it, reset the lights, checked as many things I could, no luck

I'll call the dealer, try the warranty thing today, got 37k miles on the truck
 

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Try clearing the code and see if it comes back. It will, if it's a hard failure.
 

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...be nice to hear what the resolution was... :confused:
 

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Discussion Starter · #8 · (Edited)
This is still ongoing, the indicators are still stuck on and apparently I am not the only one on the web with 07's who have had this issue. Unfortunately, not to much info about resolutions for those who have posted the problem on the web.

Clearing codes at the dealer will cost 100 bucks, they don't just clear codes, they do diagnostics hence the cost. My brother has a odbII snap-on computer but the software only goes to '05 vehicles

I jumped the odb connectors cq and tc underneath the dash to get a code. The vsc-on indicator blinks 3 times, pauses and then blinks 4 times, inferring that the code is 34, I looked that up and it points to the left rear abs speed sensor gone bad.

The little plastic part is on avg 200.00, so I have tried some other things for now.

pulled off the speed sensor, cleaned it
pulled the neg battery cable for 24 hours
disconnected the abs system (which is tied in)
ensured the brake fluid was full
checked all fuses
checked as many connectors for tightness that I could find
did a visual underneath the truck for any creased wire harnesses

so far nothing has worked and I am just outside of my warranty

next I'll run an ohm test on the sensor to see if it's bad, which I'll do in a few weeks (going on vacation)

I've seen one thread suggesting that the dealer needs to do a zero point calibration if the speed sensor is not bad

as a last fix, I'll just kill the dash light bulb :)
 

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HOPE THIS HELPS YOU OUT

Last Modified: 7-9-20106.4 CFrom: 200707 Model Year: 2008Model: FJ CruiserDoc ID: RM0000023XQ001XTitle: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0210/33,C0215/34,C1238/38,C1239/39,C1273/73,C1274/74,C1277/77,C1278/78: Rear Speed Sensor RH Circuit (2008 FJ Cruiser)DTC
C0210/33
Rear Speed Sensor RH Circuit
DTC
C0215/34
Rear Speed Sensor LH Circuit
DTC
C1238/38
Foreign Object is Attached on Tip of Rear Speed Sensor RH
DTC
C1239/39
Foreign Object is Attached on Tip of Rear Speed Sensor LH
DTC
C1273/73
Low Output Signal of Rear Speed Sensor RH (Test Mode DTC)
DTC
C1274/74
Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)
DTC
C1277/77
Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)
DTC
C1278/78
Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
DESCRIPTION

.DTC Detecting Conditions
Trouble Areas
C0210/33
C0215/34


When any of following conditions detected:
  1. At vehicle speed of 6 mph (10 km/h) or more, open or short in sensor signal circuit continues for 1 second or more.
  2. Momentary interruption of sensor signal from abnormal wheel occurs 255 times or more.
  3. Open in speed sensor signal circuit continues for 0.5 seconds or more.
  4. With IG1 terminal voltage 9.5 V or more, sensor power supply voltage decreases for 0.5 seconds or more.
  5. When vehicle driven at speed of more than 10 km/h (6 mph), one of wheel speeds below one-seventh of other wheel speeds for 15 seconds or more.
  • Rear speed sensor
  • Rear speed sensor circuit
  • Sensor installation
  • Skid control sensor wire
  • Master cylinder solenoid (skid control ECU)
C1238/38
C1239/39


When either of following conditions (1 or 2) detected:
  1. At vehicle speed of 12 mph (20 km/h) or more, noise in speed sensor signal continues for 5 seconds or more.
  2. At vehicle speed of 6 mph (10 km/h) or more, noise detected as rotor turns, for 15 seconds or more.
  • Rear speed sensor
  • Rear speed sensor circuit
  • Master cylinder solenoid (skid control ECU)
C1273/73
C1274/74


Detected only during test mode.
  • Rear speed sensor
  • Rear speed sensor circuit
  • Sensor installation
  • Skid control sensor wire
  • Master cylinder solenoid (skid control ECU)
C1277/77
C1278/78


Detected only during test mode.
  • Rear speed sensor
  • Rear speed sensor circuit
  • Master cylinder solenoid (skid control ECU)
WIRING DIAGRAM



INSPECTION PROCEDURE




NOTICE:
  • When replacing the master cylinder solenoid, perform zero point calibration
  • Check the speed sensor signal in test mode after clearing or replacement
PROCEDURE


CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Using the Techstream, check for any momentary interruption in the wire harness and connector of the speed sensor.
Select the following menu items: Chassis / ABS/VSC/TRAC/ Data List
DATA LIST: ABS/VSC/TRAC

Tester Display
Measurement Item / Range
Normal Condition
Diagnostic Note
RR Speed Open
RR speed sensor open detection: OPN_DET or NORMAL
OPN_DET: Momentary interruption
NORMAL: Normal

RL Speed Open
RL speed sensor open detection: OPN_DET or NORMAL
OPN_DET: Momentary interruption
NORMAL: Normal
There are no momentary interruptions.
HINT:
Perform the above inspection before removing the sensor and connector.

CHECK AND REPLACE HARNESS OR CONNECTOR

READ VALUE USING DATA LIST
(a) Connect the Techstream to the DLC3.
(b) Start the engine and drive the vehicle.
(c) Turn the tester on.
(d) Select the following menu items: Chassis / ABS/VSC/TRAC/ Data List
DATA LIST: ABS/VSC/TRAC

Tester Display
Measurement Item / Range
Normal Condition
Diagnostic Note
RR Wheel Speed
Wheel speed sensor (RR) reading : min.: 0 MPH (0 km/h), max.: 202 MPH (326 km/h)
Actual wheel speed
Similar to speed indicated on speedometer
RR Wheel Speed
Wheel speed sensor (RL) reading : min.: 0 MPH (0 km/h), max.: 202 MPH (326 km/h)
Actual wheel speed
Similar to speed indicated on speedometer
(e) Check that there is no significant difference between the speed value displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.

There is no significant difference in the displayed speed values.
HINT:
There is a tolerance of +- 10% in the speedometer indication.
REAR SPEED SENSOR INSTALLATION

PERFORM TEST MODE INSPECTION
(a) Perform a TEST MODE inspection and check for DTCs

REPAIR OR REPLACE HARNESS OR CONNECTOR


RECONFIRM DTC
(a) Clear the DTC(s)
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output

Result
Proceed to
DTC not output
A
DTC output
B

END

5.
CHECK REAR SPEED SENSOR INSTALLATION


(a) Check that the speed sensor installation bolt is tightened properly.
OK:
The installation bolt is tightened properly.
Torque: 8.0 N·m (82 kgf·cm, 71in·lbf)

TIGHTEN BOLT PROPERLY


CHECK REAR SPEED SENSOR
(a) Visually check the speed sensor for deformation and damage

No deformation or damage.
There is no gap between the sensor and rear axle carrier.
REAR SPEED SENSOR

INSPECT SKID CONTROL SENSOR WIRE


(a) Disconnect the rear speed sensor wire.
(b) Measure the resistance.
Standard resistance (LH)
Tester Connection
Specified Condition
X2-2 - OX1-1
10 kΩ or higher
X2-2 - OX1-2
Below 1 Ω
X2-2 - OX1-3
10 kΩ or higher
X2-2 - OX1-4
10 kΩ or higher
X2-2 - Body ground
10 kΩ or higher
X2-1 - OX1-1
Below 1 Ω
X2-1 - OX1-2
10 kΩ or higher
X2-1 - OX1-3
10 kΩ or higher
X2-1 - OX1-4
10 kΩ or higher
X2-1 - Body ground
10 kΩ or higher
Standard resistance (RH):
Tester Connection
Specified Condition
X1-1 - OX1-1
10 kΩ or higher
X1-1 - OX1-2
10 kΩ or higher
X1-1 - OX1-3
Below 1 Ω
X1-1 - OX1-4
10 kΩ or higher
X1-1 - Body ground
10 kΩ or higher
X1-2 - OX1-1
10 kΩ or higher
X1-2 - OX1-2
10 kΩ or higher
X1-2 - OX1-3
10 kΩ or higher
X1-2 - OX1-4
Below 1 Ω
X1-2 - Body ground
10 kΩ or higher

REPLACE SKID CONTROL SENSOR WIRE


CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL SENSOR)


(a) Disconnect the skid control ECU connector.
(b) Disconnect the rear speed sensor connector
(c) Measure the resistance.
Standard resistance (LH)
Tester Connection
Specified Condition
A4-20 (RL+) - X2-2
Below 1 Ω
A4-6 (RL-) - X2-1
Below 1 Ω
Standard resistance (RH)
Tester Connection
Specified Condition
A4-5 (RR+) - X1-2
Below 1 Ω
A4-19 (RR-) - X1-1
Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK SKID CONTROL SENSOR (INPUT VOLTAGE)


(a) Disconnect the rear speed sensor connector.
(b) Turn the ignition switch to ON
(c) Measure the voltage
Standard voltage (LH)
Tester Connection
Specified Condition
X2-2 - Body ground
5.7 to 17.3 V
Standard voltage (RH)
Tester Connection
Specified Condition
X1-2 - Body ground
5.7 to 17.3 V
MASTER CYLINDER SOLENOID
10
RECONFIRM DTC
(a) Clear the DTC(s) <A href="(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output
Result
Proceed to
DTC output
A
DTC not output
B

END
11
REPLACE REAR SPEED SENSOR
(a) Replace the rear speed sensor
12
RECONFIRM DTC
(a) Clear the DTC(s)
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more for at least 60 seconds.
(d) Check if the same DTC(s) is output

Result
Proceed to
DTC output
A
DTC not output
B
END
 

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Thanks for the update! It's a learning experience for a lot of us, and replies/resolutions add to the knowledge base.

Do you have, or know anyone with, a ScanGauge? Director13 had what could have been a similar problem, we reset the code with the ScanGauge, and I don't think it came back.

If you're not familiar with the Scan Gauge, it's a OBDII plug-in display (which you can leave installed) that can show various vehicle parameters, such as fuel economy (or lack thereof!) and it also allows diagnostic code readouts and resets. They are not tied to a vehicle, so you could borrow one to try a reset. You're a little far, so see if anyone out thataway has one...
 

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Discussion Starter · #11 ·
thanks pukahead for all the data, the ohms data will indeed help. I'll check into the skid control ECU connector also and see if I can get a hold of a scan guage to reset. I'l also looking for another way to reset the lights via odb connector without needing a scan guage, wip ..
 

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thanks pukahead for all the data, the ohms data will indeed help. I'll check into the skid control ECU connector also and see if I can get a hold of a scan guage to reset. I'l also looking for another way to reset the lights via odb connector without needing a scan guage, wip ..

The props should go to baja2oy for all that technical info!

:cheers:
 

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AAMCO does free diognostics but they will prolly tell ya the same thing you already know, sensors do go bad. Try swapping one from the other side and see if it still calls it out, if so the sensor is fried, if not you have a wiring problem.



 

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Discussion Starter · #14 ·
AAMCO does free diognostics but they will prolly tell ya the same thing you already know, sensors do go bad. Try swapping one from the other side and see if it still calls it out, if so the sensor is fried, if not you have a wiring problem.
good idea Mike, I'll try to swap the rear sensors and see if I get the same code # or a diff one.

I'll post up once I get a handle on it after vacation in a few weeks
 

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Discussion Starter · #16 ·
it is a pita and is what really sucks, the rear speed sensor is only 15 bucks for a ford truck but 200 for a toyota

i'll see if anyone has a scanguage at the norcal run next weekend
 
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