VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C146E and C146F
| DTC Code | DTC Name |
|---|---|
| C146E | Open in ABS Solenoid Relay Circuit |
| C146F | Short in ABS Solenoid Relay Circuit |
DESCRIPTION
The ABS solenoid relay supplies power to the ABS solenoid and TRC/TRAC solenoid.
The solenoid relay is turned on 1.5 seconds after the ignition switch is turned to ON, and is turned off if an open or short in the solenoid is detected by the self diagnosis performed when the engine starts running.
The ABS solenoid relay is housed in the skid control ECU in the actuator assembly.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
C146E |
Open in ABS Solenoid Relay Circuit |
Either of the following is detected:
|
|
C146F |
Short in ABS Solenoid Relay Circuit |
Immediately after ignition switch to ON and solenoid relay is OFF, relay contact is ON continuously for 4.5 seconds or more. |
Skid control ECU (Brake actuator assembly) |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
When C1241 and/or C1417 is output together with C146E and/or C146F, inspect and repair the trouble areas indicated by C1241 first.
for C1241:Click here
for C1417:Click here
PROCEDURE
CHECK TERMINAL VOLTAGE (+BS TERMINAL)
Turn the ignition switch off.
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A100 skid control ECU (brake actuator assembly) connector.
-
*a
Front view of wire harness connector
(to Skid Control ECU [Brake Actuator Assembly])
Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection
Condition
Specified Condition
A100-38 (+BS) - Body ground
Always
11 to 14 V
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (+BS CIRCUIT)
CHECK HARNESS AND CONNECTOR (GND1 TERMINAL)
-
*a
Front view of wire harness connector
(to Skid Control ECU [Brake Actuator Assembly])
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
A100-25 (GND1) - Body ground
Always
Below 1 Ω
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)
-
RECONFIRM DTC
Tip:These codes are detected when a problem is determined in the skid control ECU (brake actuator assembly).
The solenoid circuits are in the skid control ECU (brake actuator assembly).
Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed.
Be sure to check if any DTCs are output before replacing the skid control ECU (brake actuator assembly).
Reconnect the A100 skid control ECU (brake actuator assembly) connector.
Clear the DTCs.
Turn the ignition switch off.
Start the engine.
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.
Chassis > ABS/VSC/TRC > Clear DTCs
Chassis > ABS/VSC/TRC > Trouble Codes
Result
Proceed to
DTC C146E and/or C146F are not output
DTC C146E and C146F are output
Tip:If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), with the ignition switch ON and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly). Make sure that no DTCs are output.
If any DTCs are output while jiggling a connector or wire harness from the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
The DTCs were probably output due to a bad connection of the connector terminal.