Suzuki SWIFT RS415 2017, Service Manual

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6C-9 Power Assisted Steering System:
P/S System Symptom Diagnosis
S4RS0A6304001
This section describes trouble diagnosis of the P/S system parts whose trouble is not indicated by the on-board
diagnostic system (self-diagnostic function). When no malfunction is indicated by the on-board diagnostic system
(self-diagnosis function) and assuredly those steering basic parts as described in “Steering Symptom Diagnosis: in
Section 6A” are all in good condition, check the following power steering system parts which may be a possible cause
for each symptom of the steering.
Serial Data Link Circuit Check
S4RS0A6304012
CAUTION:
Be sure to perform “EPS System Check: ” before starting “Troubleshooting”.
Wiring Diagram
Condition Possible cause Correction / Reference Item
Steering wheel feels
heavy (Perform “Steering
Force Check: ” before
diagnosis.) Steering wheel installed improperly
(twisted) Install steering wheel correctly.
Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor Inspection: ”.
Poor performance of motor Check motor referring to “Motor Assembly
Inspection: ”.
Steering gear case assembly faulty Replace.
Poor performance of VSS Check VSS referring to “DTC P0500: Vehicle
Speed Sensor (VSS) Malfunction: in Section
1A”.
Vehicle pulls to one side
during straight driving Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor Inspection: ”.
Poor recovery after turns Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor Inspection: ”.
Steering column faulty Replace.
E52-11
E49-2 BLK
GRY
LT GRN/BLK
E52-1
E52-5
E49-1 GRN
GRN
BLK
G28-25 G28-31
RED/BLK
1
2
[B]
[A]
1 2 3 4 5
6 7 8 9
11
10
12 13 14 15 16 17 18 19 20
10 9 8 7 6 5 4 3 2 1
16 15 14 13 12 11
26 25 24 23 22 21 20 19 18 17 32 31 30 29 28 27
[C]
12V
PPL/WHT
8
3
4
4
2
4
4
5
6
7
9
1
4
I4RS0B630003-
[A]: Connector “E52” (viewed from harness side) 2. Ignition switch 6. “EPS” warning lamp
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 7. Date link connector (DLC)
[C]: Connector “G28” (viewed from harness side) 4. Fuse 8. P/S control module
1. Main fuse 5. Combination meter 9. To ECM, BCM, Air bag SDM and ABS hydraulic unit/control
module assembly