DESCRIPTION
The power steering ECU assembly is connected to the combination meter assembly via CAN communication. If the power steering ECU assembly detects a malfunction, the power steering warning light comes on. At this time, the vehicle enters fail-safe mode.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
INSPECT CAN COMMUNICATION SYSTEM |
(a) Check for DTCs of the CAN communication system (See page
).
Result |
Proceed to |
---|---|
DTC is not output |
A |
DTC is output |
B |
B | ![]() |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
2. |
CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BATTERY AND BODY GROUND) |
(a) Disconnect the F41 power steering ECU assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F41-5 (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 |
---|---|---|
F41-3 (GND) - Body ground |
Always |
Below 1 Ω |
*a |
Front view of wire harness connector (to Power Steering ECU Assembly) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM (METER/GAUGE SYSTEM) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Perform the Active Test of the combination meter using the Techstream (See
page ).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
PPS Indicator |
Power steering warning light |
ON or OFF |
Perform the test with the vehicle stopped and the engine idling. |
(d) Check that the power steering warning light operates in accordance with the Active Test.
HINT:
Reconnect the connectors and restore the vehicle to its previous condition before checking the combination meter.
OK:
The power steering warning light turns on and off in accordance with the Techstream operation.
OK | ![]() |
REPLACE POWER STEERING ECU ASSEMBLY |
NG | ![]() |
INSPECT METER/GAUGE SYSTEM (HOW TO WITH PROCEED TROUBLESHOOTING) |
Short in CAN Bus Lines
DESCRIPTION
There may be a short circuit between the CAN bus lines when the resistance between
terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.
Symptom
Trouble Area
The resistance between terminals 6 (CANH ...
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
2. REMOVE NO. 2 DOOR INSIDE HANDLE BEZEL LH
3. REMOVE REAR DO ...