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DI-291
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI8XS-02
DTC C1243 / 43, C1245 / 45 Malfunction in Deceleration Sensor
CIRCUIT DESCRIPTION
DTC No. DTC Detecting Condition Trouble Area
While vehicle speed becomes 0 km/h (0 mph) from 30 km/h
(18 mph), the condition that GL1 and GL2 signals of ECU ter-
C1243 / 43
minals do not change 40 mV or less continues 16 times in
sequence.
S Deceleration sensor
At the vehicle speed of 30 km/h (18 mph) or more, the condi-
S Wire harness for deceleration sensor system
tion that the difference between acceleration and deceleration
C1245 / 45 values of computation from deceleration sensor and vehicle
speed becomes more than 0.35 G continues for 60 sec. or
more.
WIRING DIAGRAM
Skid Control ECU
V15
VSC Deceleration 11
BR
Sensor V18 GSS
(Shielded)
21
B
GGND V18 GGND
2
1
G
VGS V18 VGS
3
10
R
GL2 V18 GL2
5
22
W
GL1 V18 GL1
1
F14346
2002 4RUNNER (RM887U)
Author : Date : 467
DI-292
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester, and go to step 3 in case of not using
the hand-held tester.
1 Check output value of deceleration sensor.
PREPARATION:
(a) Connect the hand-held tester to DLC3.
(b) Turn the ignition switch ON and turn the hand-held tester main switch ON.
(c) Select the DATALIST mode on the hand-held tester.
CHECK:
Check that the deceleration value of the deceleration sensor observed in the hand-held tester is changing
when the vehicle is tilted.
OK:
Deceleration value must be changing.
OK Go to step 3.
NG
2 Check for open and short circuit in harness and connector between deceleration
sensor and skid control ECU (See page IN-28 ).
NG Repair or replace harness or connector.
OK
Replace deceleration sensor.
2002 4RUNNER (RM887U)
Author : Date : 468
DI-293
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
3 Check deceleration sensor.
PREPARATION:
(a) Remove the consol box.
(b) Connect 3 dry batteries of 1.5 V in series.
GL2 GL1 (c) Connect VGS terminal to the batteries' positive (+) termi-
nal, and GGND terminal to the batteries' negative (-) ter-
minal, apply about 4.5 V between VGS and GGND termi-
VGS GGND nals.
NOTICE:
Do not apply voltage of 6 V or more to terminals VYS and
GYAW.
CHECK:
Check the output voltage of GL1 and GL2 terminals when the
sensor is tilted forward and rearward.
Front OK:
Rearward Symbols Condition Standard Value
GL1 Horizontal About 2.3 V
GL1 Lean forward 0.4 V - about 2.3 V
Forward GL1 Lean rearward About 2.3 V - 4.1 V
F02098
GL2 Horizontal About 2.3 V
GL2 Lean forward About 2.3 V - 4.1 V
GL2 Lean rearward 0.4 V - about 2.3 V
HINT:
S If the sensor is tilted too much it may show the wrong val-
ue.
S If dropped, the sensor should be replaced with a new one.
S The sensor removed from the vehicle should not be
placed upside down.
NG Replace deceleration sensor.
OK
4 Check for open and short circuit in harness and connector between deceleration
sensor and skid control ECU (See page IN-28 ).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
2002 4RUNNER (RM887U)
Author : Date : 469
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