Power Assisted Steering System: 6C-37
DTC “C1121”: Vehicle Speed Signal Circuit Malfunction
B931H26304012
Troubleshooting
NOTE
After repairing the trouble, clear the DTC using a SDS tool or mode coupler switch. Refer to “DTC
(Diagnostic Trouble Code) Deleting (Page 6C-20)”.
Possible Cause
• Faulty vehicle speed signal circuit.
• Faulty speed sensor.
• Faulty EPS control unit.
Step
Action
Yes
No
1
1) Turn the ignition switch OFF.
2) Check the EPS control unit connector for loose or poor
contact. If OK, then check the vehicle speed signal lead
wire continuity.
3) Disconnect the EPS control unit coupler [B], speed
sensor coupler [C] and combination meter coupler [A].
Refer to
“Speed Sensor Removal and Installation: in
Section 9C”
and
“Combination Meter Removal and
Installation: in Section 9C”
.
4) Turn the ignition switch OFF.
5) Check the EPS control unit connector for loose or poor
contact. If OK, then check the vehicle speed signal lead
wire continuity.
Go to step 2.
Bl/B wire open.
I931H1630048-01
I931H1630048-01
Summary of Contents for 2009 LT-A500XP
Page 2: ......
Page 4: ......
Page 14: ...00 9 Precautions ...
Page 224: ...1E 3 Engine Lubrication System EXHAUST SIDE INTAKE SIDE I931H1150003 02 ...
Page 304: ...1K 4 Exhaust System ...
Page 346: ...2D 5 Wheels and Tires ...
Page 438: ...3D 26 Propeller Shafts ...
Page 482: ...4D 6 Parking Brake ...
Page 512: ...5A 28 Automatic Transmission ...
Page 624: ...Prepared by December 2008 Part No 99500 44080 03E Printed in U S A 624 ...