Suzuki Swift Sport 2004 Service & Repair Manual page 918

6C-36 Power Assisted Steering System:
Voltage Check
1) Remove console box.
2) Check for voltage at each terminal with connectors connected to the P/S control module.
NOTE
As each terminal voltage is affected by the battery voltage, confirm if the battery voltage is 11 V or
more when ignition switch is ON.
*: The voltage of this circuit may not be checked by voltmeter. If so, use oscilloscope.
Terminal Wire color
E49-1 GRN
E49-2 BLK
E51-1 BLK
E51-2 RED
E52-1 LT GRN/BLK
E52-2 —
E52-3 —
E52-4 PPL
E52-5 GRY
E52-6 BLU
E52-7 —
E52-8 GRN
E52-9 BRN
E52-10 —
Circuit
Main power supply for
internal memory and P/S
motor
Ground for P/S control
module
Motor output 1
Motor output 2
Ignition switch signal for P/S
control module
—
—
Vehicle speed signal
"EPS" warning light
Torque sensor signal (Sub)
—
Main power supply for torque
sensor
Ground for torque sensors
—
Normal voltage
10 – 14 V
Below 0.3 V
*0 – 1 V
↑↓
10 – 14 V
• Engine idling and steering wheel at
("Reference
straight position
waveform No.1: ",
• Voltage between "E51-1" and vehicle
"Reference
body ground
waveform No.2:
"and "Reference
waveform No.3: ")
*0 – 1 V
↑↓
10 – 14 V
• Engine idling and steering wheel at
("Reference
straight position
waveform No.1: ",
• Voltage between "E51-2" and vehicle
"Reference
body ground
waveform No.2: "
and "Reference
waveform No.3: ")
10 – 14 V Ignition switch ON
—
—
*0 – 1 V
↑↓
8 – 14 V
• Ignition switch ON
("Reference
• Front left tire turned quickly with right
waveform No.9"
tire locked
under "Inspection of
ECM and Its Circuits
in Section 1A".)
0 V "EPS" warning light OFF
• Steering wheel with left turn
About 0 – 2.5 V
• Out put voltage varies linearly
depending on steering force
About 2.5 V Steering wheel at free
• Steering wheel with right turn
About 2.5 – 6 V
• Out put voltage varies linearly
depending on steering force
—
• Ignition switch ON
About 12 V
• Check voltage between "E52-8" and
"E52-9" terminals
Below 0.3 V
—
Remarks
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