DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU turns the motor relay on and operates the ABS pump motor.
If the voltage supplied to the motor relay (+BM) is below the DTCs detection threshold due to low voltage from the battery or alternator, the DTC may be stored.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C0273/13 |
Any of the following is detected:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
When C1241/41 is output together with C0273/13, inspect and repair the trouble areas indicated by C1241/41 first (See page ).
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Select the Active Test on the Techstream (See page ).
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Motor Relay |
ABS motor relay |
Relay ON/OFF |
Operating sound of motor can be heard |
(d) Check the operating sound of the ABS motor relay when operating it using the Techstream.
Result |
Proceed to |
---|---|
The operating sound is heard |
A |
The operating sound is not heard |
B |
B |
GO TO STEP 3 |
|
2. |
RECONFIRM DTC |
HINT:
This code is detected when a problem is identified in the brake actuator assembly.
The ABS motor relay is in the brake actuator assembly.
Therefore, ABS motor relay inspection and motor relay unit inspection cannot be performed. Be sure to check if the DTC is output before replacing the brake actuator assembly.
(a) Turn the ignition switch off.
(b) Clear the DTCs (See page ).
(c) Start the engine.
(d) Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
Check if the same DTC is recorded (See page
).
Result |
Proceed to |
---|---|
DTC (C0273/13) is not output |
A |
DTC (C0273/13) is output |
B |
HINT:
A |
CHECK FOR INTERMITTENT PROBLEMS |
B |
REPLACE BRAKE ACTUATOR ASSEMBLY |
3. |
INSPECT ABS NO. 1 FUSE |
(a) Turn the ignition switch off. |
|
(b) Remove the fusible link block from the engine room relay block.
(c) Check if the fusible link is melted.
OK:
The fusible link is not melted.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
ABS NO. 1 (50 A) fuse - Body ground |
Always |
Below 1 Ω |
*1 |
Engine Room Relay Block |
*2 |
Fusible Link Block |
*3 |
ABS NO. 1 Fuse |
NG |
REPLACE FUSIBLE LINK BLOCK (ABS NO. 1 FUSE) |
|
4. |
INSPECT SKID CONTROL ECU (+BM TERMINAL) |
(a) Install the fusible link block to the engine room relay block. |
|
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(c) Disconnect the skid control ECU connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A42-2 (+BM) - Body ground |
Always |
11 to 14 V |
*1 |
Front view of wire harness connector (to Brake Actuator (Skid Control ECU)) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (+BM CIRCUIT) |
|
5. |
INSPECT SKID CONTROL ECU (GND2 TERMINAL) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK |
REPLACE BRAKE ACTUATOR ASSEMBLY |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT) |
Cleaning and protecting the vehicle exterior
Perform the following to protect the vehicle and maintain it in prime condition.
• Working from top to bottom, liberally apply water to the vehicle body, wheel
wells and underside of the vehicle to remove any dirt and dust.
Wash the vehicle body using a ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Push-button start function data and the Diagnostic Trouble Codes (DTCs) can
be read through the Data Link Connector 3 (DLC3) of the vehicle. When the function
seems to be malfunctioning, use the Techstream to check for ...
Light bulbs
You may replace the following bulbs yourself. The difficulty level of replacement
varies depending on the bulb. If necessary bulb replacement seems difficult to perform,
contact your Toyota dealer.
For more information about replacing other light bulbs, c ...