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DI-276
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI8XR-02
DTC C1232 / 32, C1244 / 44 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS & BA & TRAC & VSC.
If the sensor functions abnormally, the ABS warning light comes on.
CIRCUIT DESCRIPTION
DTC No. DTC Detecting Condition Trouble Area
Detection of either the condition 1. or 2.:
1. At the vehicle speed of 10 km/h (6 mph) or more, when
the condition that ECU terminal GL1 signal change
range is less than 20 mV, and ECU terminal GL2 signal
change range swings by 468 mV or more occurs for 30
S Deceleration sensor
C1232 / 32 sec. or more.
S Deceleration sensor circuit
2. At the vehicle speed of 10 km/h (6 mph) or more, the
condition that ECU terminal GL2 signal change range is
less than 20 mV, and ECU terminal GL1 signal change
range swings by 468 mV or more occurs for 30 sec. or
more.
Any of the conditions 1. through 4. is detected:
1. The condition that ECU terminals GL1 and GL2 values
are -1.5 G or less or 1.5 G or more continues for 1.2
sec. or more.
2. The condition that the deceleration sensor terminal VGS
voltage is 4.4 V or less or 5.6 V or more continues for
1.2 sec. or more. S Deceleration sensor
C1244 / 44
3. At the vehicle speed of 0 km/h (0 mph), after the differ- S Deceleration sensor circuit
ence of output value between deceleration sensor termi-
nals GL1 and GL2 becomes 0.6 G or more, the condi-
tion that it does not become 0.4 G or less continues for
60 sec. or more.
4. Deceleration sensor signal momentary open occurs for
7 times or more.
2002 4RUNNER (RM887U)
Author : Date : 452
DI-277
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
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 : 453
DI-278
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
INSPECTION PROCEDURE
1 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
2 Check deceleration sensor.
In case of using the hand-held tester:
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
as the vehicle is tilted.
OK:
Deceleration value must be changing.
In case of not using the hand-held tester:
PREPARATION:
(a) Remove the consol box.
GL2 GL1 (b) Connect 3 dry batteries of 1.5 V in series.
(c) Connect VGS terminal to the batteries' positive (+) termi-
nal, and GGND terminal to the batteries' negative (-) ter-
VGS GGND minal, apply about 4.5 V between VGS and GGND termi-
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
Front sensor is tilted forward and rearward.
OK:
Rearward
Symbols Condition Standard Value
GL1 Horizontal About 2.3 V
Forward GL1 Lean forward 0.4 V - about 2.3 V
F02098
GL1 Lean rearward About 2.3 V - 4.1 V
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
2002 4RUNNER (RM887U)
Author : Date : 454
DI-279
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
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
Check and replace skid control ECU.
2002 4RUNNER (RM887U)
Author : Date : 455
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