Dtc 1020: Master Cylinder Pressure Sensor Power Supply Failure; Dtc C1024: Steering Angle Sensor Circuit Failure; Dtc C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Right-Front / Left-Front / Right-Rear / Left-Rear Wheel Speed Sensor Circuit Or Encoder Failure - Suzuki GRAND VITARA JB416 Service Manual

Step
5 Check brake fluid level switch circuit
1) Disconnect BCM connector.
2) Check for proper connection to BCM connector at "G31-
7" terminal.
3) If OK, then check resistance between "G31-7" terminal
and vehicle body ground.
Is resistance infinity?
6 Check BCM
1) Connect brake fluid level switch connector and BCM
connector.
2) Check voltage at "G31-7" terminal of BCM referring to
"Inspection of BCM and its Circuits: in Section 10B in
related manual".
Is voltage in good condition?

DTC 1020: Master Cylinder Pressure Sensor Power Supply Failure

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
Power supply voltage to master cylinder pressure sensor
in ESP® hydraulic unit / control module assembly is too
low.
DTC Troubleshooting
1) Turn ignition switch to OFF position.
2) Check for proper connection from harness to ESP® control module.
3) If OK, substitute an ESP® hydraulic unit / control module assembly with correct part number.
4) Recheck system.
DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Right-Front / Left-Front / Right-
Rear / Left-Rear Wheel Speed Sensor Circuit or Encoder Failure
Refer to "DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Right-Front / Left-Front / Right-Rear /
Left-Rear Wheel Speed Sensor Circuit or Encoder Failure: in Section 4E".

DTC C1024: Steering Angle Sensor Circuit Failure

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
• Steering angle sensor internal defect is detected by
CPU in steering angle sensor.
• Steering angle sensor signal is out of specified range.
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 C1037, U1073 and/or U1126 detected?
Action
Action
Electronic Stability Program:
Yes
Go to Step 6.
Substitute a known-
good ESP® hydraulic
unit / control module
assembly and recheck.
Trouble Area
• ESP® control module
Trouble Area
• Steering angle sensor
• ESP® control module
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
4F-28
No
"BLKL/RED" wire circuit
is shorted to ground.
Check BCM power and
ground circuit. If circuit
is OK, substitute a
known-good BCM and
recheck.
S5JB0E4604028
S5JB0E4604014
S5JB0E4604029
No
Go to "Electronic
Stability Program
Check: ".
Go to Step 3.