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 |
Locking the driver’s doors from the outside without a key
Move the inside lock button to the
lock position.
Close the door.
►Vehicles with smart key system
The door cannot be locked if the “ENGINE START STOP” switch is in ACCESSORY or IGNITION
ON mode, or the electronic key is left inside the vehic ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT GENERATOR CLUTCH PULLEY
(a) Hold the generator rotor using SST, and turn the clutch pulley clockwise
to check that the outer ring locks.
SST: 09820-63021
Text in Illustration
*1
...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK BATTERY CONDITION
NOTICE:
If the battery is weak or if the engine is difficult to start, perform the following
procedure.
(a) Check the battery for damage or deformation. If severe damage, deformation
or leakag ...