Electronic Stability Program: 4F-29
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1017 / C1023: Yaw Rate / G Sensor Assembly Failure
S7RS0B4604025
DTC C1017: Lateral G Sensor Range / Performance
DTC C1023: Yaw Rate Sensor Failure
DTC Detecting Condition and Trouble Area
DTC Detecting Condition Trouble Area
Vehicle behavior and stop lamp switch signal is disagreed
for specified time.
• Back up light switch circuit
• Back up light switch
•ECM
• 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®.
Is DTC U1073 and/or U1100 detected?
Go to applicable diag.
flow.
Go to Step 3.
3 Check stop lamp switch circuit
1) Check stop lamp, stop lamp (brake pedal) switch and
their circuit referring to “Brake Light Symptom Diagnosis
in Section 9B”.
Are they in good condition?
Go to Step 4. Repair or replace.
4 Check ECM circuit for stop lamp switch
1) Disconnect connectors from ECM.
2) Check for proper connection to “E23-20” wire of ECM
connector.
3) If connections are OK, check stop lamp switch circuit for
the following.
• Resistance of “GRN/WHT” wire terminal of stop lamp
switch between stop lamp switch connector and ECM
connector is less than 1 Ω (continuity check)
• Resistance between “GRN/WHT” wire terminal of stop
lamp switch connector and vehicle body ground is
infinity (ground short check)
• Voltage of between “GRN/WHT” wire terminal of stop
switch connector and vehicle body ground is 0 V with
ignition switch tuned ON (power short check)
Are they in good condition?
Substitute a known-
good ECM and recheck.
If DTC C1016 is still
detected, substitute a
known-good ESP®
hydraulic unit / control
module assembly and
recheck.
Repair or replace
defective wire.
DTC Detecting Condition Trouble Area
C1017:
Lateral G sensor signal is out of specified range.
C1023:
• Yaw rate sensor signal is out of range.
• Vehicle behavior and yaw rate signal is disagreed.
• Yaw rate / G sensor assembly
• ESP® control module
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