DESCRIPTION
This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output.
DTC No. |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
---|---|---|---|---|
P157800 |
|
|
Does not come on |
SAE: P1578 |
CAUTION / NOTICE / HINT
HINT:
When this DTC is output, confirm that the vehicle stability control system is normal since it may be malfunctioning.
for Hydraulic Brake Booster: See page
for Vacuum Brake Booster: See page
PROCEDURE
1. |
CHECK FOR DTC (ABS/VSC/TRAC) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch on.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
(e) Check for DTCs (See page ).
OK:
Vehicle stability control system DTCs are not output
Result
Result |
Proceed to |
---|---|
OK |
A |
NG (for Hydraulic Brake Booster) |
B |
NG (for Vacuum Brake Booster) |
C |
B | ![]() |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
C | ![]() |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
2. |
CHECK FOR DTC (DTC P157800) |
(a) Clear the DTCs (See page ).
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
(1) Drive the vehicle at a speed for which cruise control operation is possible.
(2) Turn the cruise control system on using the cruise control main switch (ON/OFF).
(3) Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.
(c) Turn the Techstream on.
(d) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
(1) Drive the vehicle at a speed for which cruise control operation is possible.
(2) Turn the cruise control system on using the cruise control main switch (ON/OFF).
(3) Push the cruise control main switch to -/SET to begin control of vehicle speed by the cruise control system.
(e) Check the DTCs (See page ).
OK:
DTC P157800 is not output
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
NG | ![]() |
REPLACE ECM |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (w/ Intermittent function)
(a) Remove the steering column cover.
(b) Check the front wiper intermittent operation.
Text in Illustration
*a
Component with harness connected
(Windshield Wiper Sw ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
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 because intermittent conditions or signals may be ...
Precaution
PRECAUTION
1. PRECAUTIONS FOR REFRIGERANT HFO-1234yf (R1234yf)
(a) Compatibility
(1) The parts used in the refrigerant cycle, the compressor oil, etc. of the
HFO-1234yf (R1234yf) system are not compatible with the conventional HFC-134a (R134a)
system.
(b) HFO-1234yf (R1234yf) Refrigerant
(1 ...