Suzuki 2006 SX4, Service Manual

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6C-20 Power Assisted Steering System:
DTC Troubleshooting
Step Action Yes No
1 Was “EPS System Check” performed? Go to Step 2. Go to “EPS System
Check”.
2 DTC check
Is DTC C1153 or C1116 indicated, together?
Go to applicable diag.
flow. Go to Step 3.
3 Torque sensor signal circuit check
1) With ignition switch turned OFF, disconnect torque
sensor connector.
2) Check for voltage between following terminal with
ignition switch ON.
• “E11-18” (“YEL” wire) terminal and body ground
• “E11-10” (“WHT” wire) terminal and body ground
Is it about 0 V?
Go to Step 4. Torque sensor signal
circuit is shorted to
other circuit.
4 Torque sensor circuit check
1) Disconnect P/S control module connector.
2) Check that torque sensor signal circuit is as follows.
• Insulation resistance of wire harness is infinity
between “Torque sensor signal circuit” terminal and
other terminal at torque sensor connector.
• Wiring harness resistance of “Torque sensor signal
circuit” is less than 1
Ω
.
• Insulation resistance between “Torque sensor signal
circuit” and vehicle body ground is infinity.
Is circuit in good condition?
Go to Step 5. Repair or replace
defective circuit.
5 Torque sensor check
1) Connect connectors to P/S control module and torque
sensor with ignition switch turned OFF.
2) Check torque sensor out put voltage referring to “Torque
Sensor and Its Circuit Inspection”.
Is torque sensor in good condition?
Substitute a known-
good P/S control
module and recheck. Go to Step 6.
6 P/S control module resistance check
1) With ignition switch turned OFF, disconnect torque
sensor connector.
2) Check for resistance between following terminal with
ignition switch ON.
• “E11-18” (“YEL” wire) terminal and body ground
• “E11-10” (“WHT” wire) terminal and body ground
Is it about 1 k
Ω
?
Replace steering gear
case. Replace P/S control
module.