Toyota Corolla Cross: Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the clearance warning ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY POWER SOURCE) |
(a) Disconnect the I24 clearance warning ECU assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
(1) for HEV Model:
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I24-1 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
|
I24-1 (IG) - Body ground |
Ignition switch off |
Below 1 V |
(2) for Gasoline model:
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I24-1 (IG) - Body ground |
Ignition switch ON |
10.5 to 16 V |
|
I24-1 (IG) - Body ground |
Ignition switch off |
Below 1 V |
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (for HEV Model) |
B |
|
NG (for Gasoline Model) |
C |
| B | .gif)
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| C |
|
GO TO STOP AND START SYSTEM |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I24-31 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Sensor Frozen Indication (Dirty or Frozen)
DESCRIPTION
When the ultrasonic sensor is dirty or frozen, "Parking Assist
Unavailable Please Clean Parking Assist Sensor" is displayed on the multi-information
display in the combinati
Precaution
PRECAUTION
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY
TERMINAL
NOTICE:
After the ignition switch is turned off, there may be a waiting
time before disconnecting the nega
SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION)
Procedure Part Name Code
1 REAR SEAT OUTER BELT ASSEMBLY
73370E
- -
2 DECK TRIM SIDE PANEL ASSEMBLY
64740C -
- -
3 LUGGAGE HOLD BELT STRIKE
Communication between ECUs connected by LIN Bus off (B278588)
DESCRIPTION
If the certification ECU (smart key ECU assembly) detects a communication error
with an ECU connected to the certification bus lines for 7 seconds or more, DTC
B278588 will be stored.
DTC No.
Detection Item
DTC Detection Condition
Trouble
