Electronic Stability Program: 4F-39
DTC Troubleshooting
DTC C1039: Yaw Rate / G Sensor Assembly Internal Failure
S7RS0B4604035
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1040: Stability Control System Function Failure
S7RS0B4604036
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
Step Action Yes No
1 Was “Electronic Stability Program Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 Check DTC
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC.
Is there any DTC(s) other than C1038 and C1090?
Go to applicable DTC
diag. flow.
Substitute a known-
good steering angle
sensor and recheck. If
DTC C1038 is still
detected, substitute a
known-good ESP®
hydraulic unit control
module assembly and
recheck.
DTC Detecting Condition Trouble Area
Yaw rate / G sensor assembly internal failure is detected. • Yaw rate / G sensor assembly
• 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
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC.
Are DTC C1034 and/or C1073 detected?
Go to applicable DTC
diag. flow.
Go to step 3.
3 Check yaw rate / G sensor assembly
1) Check yaw rate / G sensor assembly referring to “Yaw
Rate / G Sensor Assembly On-Vehicle Inspection”.
Is it good condition?
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
Substitute a known-
good yaw rate / G
sensor assembly and
recheck.
DTC Detecting Condition Trouble Area
Stability control is active for more than specified time
without yaw rate change.
• 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 Check DTC for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP®.
Is there any DTC(s) other than C1040?
Go to applicable DTC
diag. flow.
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
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