DESCRIPTION
The power steering ECU distinguishes the ignition switch status as ON or off through the IG power source circuit.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1551 |
IG power source circuit malfunction inside ECU |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (IG POWER SUPPLY) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Data List.
(f) Select the items "IG Power Supply" in the Data List and read the value displayed on the Techstream.
EMPS
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
IG Power Supply |
ECU power source voltage/ Min.: 0 V Max.: 20.1531 V |
11 to 14 V |
Ignition switch ON |
OK:
Normal condition value is displayed the Techstream.
OK |
REPLACE POWER STEERING ECU |
|
2. |
CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU) |
(a) Disconnect the connectors from the power steering ECU. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
D20-6 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D19-2 (PGND) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Power Steering ECU) |
OK |
REPLACE POWER STEERING ECU |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Indicators and warning lights
The indicator and warning lights on the instrument cluster and center panel
inform the driver of the status of the vehicle’s various systems.
For the purpose of explanation, the following illustration displays all indicators
and warning lights illuminat ...
Skid Control ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Skid Control ECU Communication Stop Mode
"ABS/VSC/TRAC" is not displayed on "CAN Bus Check" screen of
the Techstr ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The procedure listed below is for the LH side.
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
...