4F-34 Electronic Stability Program:
DTC C1024: Steering Angle Sensor Circuit Failure
S7RS0B4604029
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1027: ESP® OFF Switch Circuit Failure
S7RS0B4604030
Wiring Diagram
6 Check wheel speed sensor
1) Refer to “Front / Rear Wheel Speed Sensor On-Vehicle
Inspection”, check output voltage or waveform.
Is specified voltage and/or waveform obtained?
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
Replace wheel speed
sensor and recheck.
Step Action Yes No
DTC Detecting Condition Trouble Area
• Steering angle sensor internal defect is detected by
CPU in steering angle sensor.
• Steering angle sensor signal is out of specified range.
• Steering angle sensor
• ESP® control module
Step Action Yes No
1 Was “Electronic Stability Program Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP®.
Are DTC U1073 and/or U1126 detected?
Go to applicable DTC
diag. flow.
Go to Step 3.
3 Check sensor calibration
1) Calibrate steering angle sensor referring to “Sensor
Calibration”.
2) Clear all DTC(s) and check DTC for ESP®.
Is DTC C1024 still detected?
Go to Step 4. Steering angle sensor
calibration was
incompleted.
4 Check steering angle sensor
1) Check steering angle sensor referring to “Steering Angle
Sensor On-Vehicle Inspection”.
Is it good condition?
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
Replace steering angle
sensor.
[A]
E85
16
1
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
LT GRN/RED
BLK/ORN
12V
E85-7
1
2
I6RS0B460018-01
[A]: ESP® control module connector (viewed from terminal side) 1. ESP® OFF Switch 2. ESP® hydraulic unit control module assembly
To Next Page
Loading...
Need help?
General
