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DI-337
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI8XU-02
DTC C1336 / 39 Zero Point Calibration of Deceleration
Sensor Undone
CIRCUIT DESCRIPTION
DTC No. DTC Detecting Condition Trouble Area
Either the condition 1. or 2. is detected:
1. In TEST mode, the shift lever is shifted to any position
S Deceleration sensor
except P range within 2 sec. after ECU terminal IG1 is
C1336 / 39 S Deceleration sensor circuit
turned ON for the first time.
S PNP switch circuit (P range)
2. The deceleration sensor zero point recorded in ECU is
deleted.
WIRING DIAGRAM
Skid Control ECU
18
BR-B
Yaw Rate Sensor V18 YSS
(Shielded)
28
W
YAW2 V18 YAW
1
27
B
GYAW V18 GYAW
3
9
R
VYS V18 VYS
5
19
Y
YD V18 YD
4
F14346
2002 4RUNNER (RM887U)
Author : Date : 513
DI-338
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
INSPECTION PROCEDURE
HINT:
After step 1 and 2, go to step 3 in case of using the hand-held tester, and go to step 5 in case of not using
the hand-held tester.
1 Perform zero point calibration of Deceleration sensor (See page DI-224 ).
2 Is DTC still output?
Check DTC on page DI-224 .
NO No problem.
YES
3 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
2002 4RUNNER (RM887U)
Author : Date : 514
DI-339
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
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
Replace deceleration sensor.
5 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
2002 4RUNNER (RM887U)
Author : Date : 515
DI-340
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
6 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 : 516
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