Dtc C1017 / C1023: Lateral G Sensor / Yaw Rate Sensor; Dtc C1020 / C1028: Master Cylinder Pressure Sensor Power Supply Failure / Circuit - Suzuki SX4 Service Manual

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4F-32 Electronic Stability Program:

DTC C1017 / C1023: Lateral G Sensor / Yaw Rate Sensor

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
C1017:
• Lateral G sensor signal is out of specified range.
• Vehicle behavior and lateral G sensor signal is
disagreed.
C1023:
• Yaw rate sensor signal is out of range.
• Vehicle behavior and yaw rate signal is disagreed.
DTC Troubleshooting
Step
1
Was "Electronic Stability Program Check" performed?
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 U0073 and/or U0123 detected?
3
Check yaw rate / G sensor
1) Check yaw rate / G sensor referring to "Yaw Rate / G
Sensor On-Vehicle Inspection".
Is it good condition?

DTC C1020 / C1028: Master Cylinder Pressure Sensor Power Supply Failure / Circuit

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
DTC C1020:
Power supply voltage to master cylinder pressure sensor
is too high or low in ESP® hydraulic unit / control module
assembly.
DTC C1028:
• Master cylinder pressure sensor circuit is opened,
shorted to power or ground circuit in ESP® control
module.
• Master cylinder pressure sensor signal is out of
specified range in ESP® control module.
DTC Troubleshooting
Step
1
Was "Electronic Stability Program Check" performed?
2
Check ESP® hydraulic unit / control module assembly
power and ground circuit
1) Check that ESP® hydraulic unit / control module
assembly power supply circuit and ground circuit is in
good condition referring to "ESP® Hydraulic Unit /
Control Module Assembly Power and Ground Circuit
Check".
Are check results OK?
Action
Action
Trouble Area
• Yaw rate / G sensor
• ESP® control module
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
Trouble Area
• ESP® control module
Yes
Go to Step 2.
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
S7RW0A4604017
No
Go to "Electronic
Stability Program
Check".
Go to Step 3.
Substitute a known-
good yaw rate / G
sensor and recheck.
S7RW0A4604018
No
Go to "Electronic
Stability Program
Check".
Repair ESP® hydraulic
unit / control module
assembly power or
ground circuit.

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