DESCRIPTION
When a problem occurs in the power steering system, the power source relay circuit is shut off to stop the power assist.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1552 |
PIG power source circuit malfunction inside ECU |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (PIG POWER SUPPLY) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Data List.
(f) Select the items "PIG Power Supply" in the Data List and read the value displayed on the Techstream.
EMPS
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
PIG Power Supply |
Power source voltage to active motor/ Min.: 0 V Max.: 20.1531 V |
11 to 14 V |
The engine is running and power steering is operating. |
OK:
Normal condition value is displayed the Techstream.
OK | ![]() |
REPLACE POWER STEERING ECU |
|
2. |
CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the connector from the power steering ECU. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D19-1 (PIG) - Body ground |
Always |
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 |
Installation
INSTALLATION
PROCEDURE
1. ADJUST COMPRESSOR OIL LEVEL
(a) When replacing the cooler compressor assembly with a new one, gradually
discharge the inert gas (helium) from the service valve, and drain the following
amount of oil from the vent ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful bec ...