DIAGRAMA SENSORES ----ECU-----ACTUADORES
DIAGRAMA DE FLUJO PARA DIAGNOSTICAR UN PROBLEMA
HINT:
Use these procedures to troubleshoot the Anti-lock Brake System (ABS).
*: Use the intelligent tester.
1.VEHICLE BROUGHT TO WORKSHOP
NEXT
2.INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT
3.CHECK AND CLEAR DTC*
NEXT
4.PROBLEM SYMPTOM CONFIRMATION
5.SYMPTOM SIMULATION
NEXT
6.CHECK FOR DTC*
7.PROBLEM SYMPTOMS TABLE
Symptom
Suspected Area
1. IG power suouce circuit (ground circuit)
2. Front speed sensor circuit
ABS does not operate
3. Rear speed sensor circuit
4. Brake actuator (hydraulic circuit)
When above areas (1 to 4) are all normal but problem still
occurs, replace skid control ECU
ABS does not operate properly
1. Front speed sensor circuit
2. Rear speed sensor circuit
3. Stop light switch circuit
4. Brake actuator (hydraulic circuit)
When above areas (1 to 4) are all normal but problem still
occurs, replace skid control ECU
ABS warning light malfunction
1. ABS warning light circuit
2. Skid control ECU
1. ABS warning light circuit
DTC check cannot be performed
2. TC and CG terminal circuit
When above areas (1 and 2) are normal but problem still
occurs, replace skid control ECU
Speed sensor signal check cannot 1. TS and CG terminal circuit
be performed
2. Skid control ECU
8.OVERALL ANALYSIS AND TROUBLESHOOTING
a
Terminals of EcU
Data List / Active Test
CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU WITH ACTUATOR)
a.
Measure the voltage of the wire harness side connector.
Symbols (Terminal No.)
Wiring
Color
Terminal Description
Condition
Specified
Condition
+BS (S2-1) - GND (S2- W-R - WSolenoid relay power supply Always
2, 24)
B
10 to 14 V
EXI4*1 (S2-3) - GND
(S2-2, 24)
G-W - WL4 switch input
B
Ignition switch ON, L4 switch ON
Below 1.5 V
EXI4*1 (S2-3) - GND
G-W - W- L4 switch input
Ignition switch ON, L4 switch OFF
8 to 14 V
(S2-2, 24)
GL1*1, *4 (S2-4) GND (S2-2, 24)
R - W-B
Deceleration sensor input
Ignition switch ON, vehicle is
stopped
0.5 to 4.5 V
GGND*1 (S2-7) - GND
B - W-B
(S2-2, 24)
Deceleration sensor GND
Ignition switch OFF
Below 1.5 V
FL+ (S2-9) - FL (S2-8)
Front speed sensor LH input
Ignition switch ON, slowly turn left
front wheel
Pulse
generation
STP (S2-10) - GND (S2- G-W - WStop light switch input
2, 24)
B
Stop light switch ON
8 to 14 V
STP (S2-10) - GND (S2- G-W - WStop light switch input
2, 24)
B
Stop light switch OFF
Below 1.5 V
RL+ (S2-11) - RL (S212)
Ignition switch ON, slowly turn left
rear wheel
Pulse
generation
WA (S2-13) - GND (S2- R-G - WABS warning light output
2, 24)
B
Ignition switch ON, ABS warning
light ON
9 to 14 V
WA (S2-13) - GND (S2- R-G - WABS warning light output
2, 24)
B
Ignition switch ON, ABS warning
light OFF
Below 1 V
D/G (S2-14) - GND (S2- L-Y - W2, 24)
B
Diagnosis tester
communication line
Ignition switch ON
10 to 14 V
TS (S2-15) - GND (S22, 24)
W - W-B
Terminal TS of DLC3
Ignition switch OFF
Below 1.5 V
TS (S2-15) - GND (S22, 24)
W - W-B
Terminal TS of DLC3
Ignition switch ON
10 to 14 V
TC (S2-16) - GND (S2P-L - W-B Terminal TC of DLC3
2, 24)
Ignition switch OFF
Below 1.5 V
TC (S2-16) - GND (S2P-L - W-B Terminal TC of DLC3
2, 24)
Ignition switch ON
10 to 14 V
R-G
P-L
Rear speed sensor LH input
EXI*1 (S2-17) - GND
(S2-2, 24)
R-B - W- Differential vacuum actuator Ignition switch ON, differential
B
switch input
vacuum actuator switch ON
Below 1.5 V
EXI*1 (S2-17) - GND
(S2-2, 24)
R-B - W- Differential vacuum actuator Ignition switch ON, differential
B
switch input
vacuum actuator switch OFF
10 to 14 V
PKB (S2-18) - GND
(S2-2, 24)
L-O*2 W-B
LG*3 W-B
Parking brake switch input
Ignition switch ON, parking brake
switch ON
Below 1.5 V
PKB (S2-18) - GND
(S2-2, 24)
L-O*2 W-B
LG*3 W-B
Parking brake switch input
Ignition switch ON, parking brake
switch OFF
10 to 14 V
EXI2 (S2-22) - GND
(S2-2, 24)
V - W-B
IG1 power supply
Ignition switch ON
10 to 14 V
+BM (S2-23) - GND
(S2-2, 24)
R - W-B
Motor relay power supply
Always
10 to 14 V
IG1 (S2-25) - GND (S2B - W-B
2, 24)
IG1 power supply
Ignition switch ON
10 to 14 V
VGS*1, *4 (S2-28) GND (S2-2, 24)
W - W-B
Deceleration sensor power
supply
Ignition switch ON, vehicle is
stopped
4.75 to 5.25 V
FR+ (S2-31) - FR (S230)
L-W - O
Front speed sensor RH input
Ignition switch ON, slowly turn right Pulse
front wheel
generation
RR+ (S2-33) - RR (S234)
b.
c.
d.
e.
f.
g.
G-R
Rear speed sensor RH input
HINT:
*1: 4WD
*2: 1GR-FE
*3: Except 1GR-FE
*4: Pre-runner
If the result is not as specified, there may be a malfunction in the skid control ECU.
Go to step 10
9.CHECK FOR FLUID LEAKAGE
NEXT
10.REPAIR OR REPLACE
NEXT
11.CONFIRMATION TEST
NEXT
END
Ignition switch ON, slowly turn right Pulse
rear wheel
generation
