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 Circuit Normal voltage Remarks
E49-1 GRN
Main power supply for
internal memory and P/S
motor
10 – 14 V —
E49-2 BLK
Ground for P/S control
module
Below 0.3 V —
E51-1 BLK Motor output 1
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ”,
“Reference
waveform No.2:
”and “Reference
waveform No.3: ”)
• Engine idling and steering wheel at
straight position
• Voltage between “E51-1” and vehicle
body ground
E51-2 RED Motor output 2
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ”,
“Reference
waveform No.2: ”
and “Reference
waveform No.3: ”)
• Engine idling and steering wheel at
straight position
• Voltage between “E51-2” and vehicle
body ground
E52-1 LT GRN/BLK
Ignition switch signal for P/S
control module
10 – 14 V Ignition switch ON
E52-2 — — — —
E52-3 — — — —
E52-4 PPL Vehicle speed signal
*0 – 1 V
↑↓
8 – 14 V
(“Reference
waveform No.9”
under “Inspection of
ECM and Its Circuits
in Section 1A”.)
• Ignition switch ON
•Front left tire turned quickly with right
tire locked
E52-5 GRY “EPS” warning light 0 V “EPS” warning light OFF
E52-6 BLU Torque sensor signal (Sub)
About 0 – 2.5 V
• Steering wheel with left turn
• Out put voltage varies linearly
depending on steering force
About 2.5 V Steering wheel at free
About 2.5 – 6 V
• Steering wheel with right turn
• Out put voltage varies linearly
depending on steering force
E52-7 — — — —
E52-8 GRN
Main power supply for torque
sensor
About 12 V
• Ignition switch ON
• Check voltage between “E52-8” and
“E52-9” terminals
E52-9 BRN Ground for torque sensors Below 0.3 V —
E52-10 — — — —
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