Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di abs cic0278c
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DI-220
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
DI6SO-04
DTC C0278 / 11, C0279 / 12 ABS Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No. DTC Detecting Condition Trouble Area
With IG1 terminal voltage at 8.5 V -19 V, when solenoid
C0278 / 11 relay is turned ON, relay contact is OFF*1 for 0.2 sec. or S ABS solenoid valve relay
longer. S ABS solenoid valve relay circuit
Immediately after IG1 is turned ON, when solenoid relay is S Valve supply voltage
C0279 / 12
turned OFF, relay contact is ON*2 for 0.2 sec. or longer.
*1 Relay contact OFF condition: When all solenoid supplied voltage are below 2.5 V.
*2 Relay contact ON condition: Any of voltage supplied by solenoid is 6 V or more.
WIRING DIAGRAM
ABS Actuator with ECU
Fusible Link Block
ALT ABS 24
5 B
A4 +BM
2
B
A4 +BS
1
BR
A4 GND1
23
W-B
A4 GND2
Battery
EC
F09225
2002 ECHO (RM884U)
Author : Date : 390
DI-221
DIAGNOSTICS - ANTI-LOCK BRAKE SYSTEM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check ABS solenoid relay operation.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check the operation sound of the ABS solenoid relay when operating it with the TOYOTA hand-held tester.
OK:
The operation sound of the ABS solenoid relay should be heard.
NG Check and replace ABS actuator assembly.
OK
2 Check voltage between terminals +BS (2) and GND (1, 23) of ABS ECU.
PREPARATION:
LOCK Disconnect the ABS ECU connector.
CHECK:
1 Measure the voltage between terminals 2 and 1, 23 of ABS
(-) ECU harness side connector.
OK:
Voltage: 10 - 14 V
(+)
23
2 F08556
NG Check and replace ECU-IG fuse.
Check and repair harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection. If the connection is normal, the ECU may be defective.
2002 ECHO (RM884U)
Author : Date : 391
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