4F-32 Electronic Stability Program:
DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Wheel Speed Sensor Circuit or
Encoder Failure
S7RS0B4604051
DTC C1021 / C1025 / C1031 / C1035: Right-Front / Left-Front / Right-Rear / Left-Rear Wheel Speed
Sensor Circuit Failure
DTC C1022 / C1026 / C1032 / C1036: Right-Front / Left-Front / Right-Rear / Left-Rear Wheel Speed
Sensor or Encoder Failure
Wiring Diagram
DTC Detecting Condition and Trouble Area
NOTE
When the vehicle was operated in any of the following ways, one of these DTCs may be set even when
the sensor is in good condition. If such possibility is suspected, clear DTC once referring to “DTC
Clearance” and then performing the driving test as described in Step 2 of “Electronic Stability Program
System Check”, check whether or not any abnormality exists.
• The vehicle was driven with parking brake pulled.
• Wheel spin occurred while driving.
• Wheel(s) was turned while the vehicle was jacked up.
• The vehicle was stuck.
DTC Troubleshooting
[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
RED/BLK
RED
E85-15
E85-14
12V
BLK
WHT
1
WHT/BLK
WHT
E85-2
E85-3
12V
BLK
WHT
2
BLK
WHT
LT GRN/BLK
LT GRN
E85-6
E85-5
12V
3
BLK
WHT
BRN
E85-11
E85-12
12V
4
YEL
5
I6RS0B460016-01
[A]: ESP® control module connector (viewed from
terminal side)
2. Right- front wheel speed sensor 4. Right-rear wheel speed sensor
1. Left-front wheel speed sensor 3. Left-rear wheel speed sensor 5. ESP® hydraulic unit / control module assembly
DTC Detecting Condition Trouble Area
DTC C1021, C1025, C1031, C1035:
Wheel sensor signal is out of specified range.
DTC C1022, C1026, C1032, C1036:
Abnormal wheel speed sensor signal is detected.
• Wheel speed sensor
• Wheel speed sensor circuit
• Wheel encoder
• 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”.
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