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DI-224
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI8XO-02

PRE-CHECK
2WD: USA: 1. DIAGNOSIS SYSTEM
(a) Inspect the battery positive voltage.
Battery positive voltage: 10 - 14 V
4WD: CANADA:
(b) Check the warning lights and buzzer.
(1) Release the parking brake lever.
(2) When the ignition switch is ON, check that the ABS,
BRAKE, VSC TRAC warning lights, VSC or TRAC
OFF and SLIP indicator lights go on for 3 sec.
(3) 4WD:
Check that the center diff. lock indicator light and
VSC OFF indicator light light up when the center
diff. lock switch is pressed.
F14323
(4) Depressing the brake pedal repeatedly may light
the warning light and sound the buzzer.
HINT:
S If the ECU stores DTC, ABS or VSC TRAC indicator light
is ON.
S If the indicator check result is not normal, proceed to trou-
bleshooting for the circuits of the ABS, BRAKE warning
lights,VSC or TRAC OFF, SLIP, center diff. lock indicator
lights.
Trouble Area See page
ABS warning light circuit DI-351
BRAKE warning light circuit DI-365
VSC TRAC warning light circuit DI-354
VSC OFF indicator light circuit (4WD) DI-357
TRAC OFF indicator light circuit (2WD) DI-360
SLIP indicator light circuit DI-363
Center diff. lock indicator light circuit (4WD) DI-357
VSC buzzer circuit DI-367

(c) In case of not using the hand-held tester:
DLC1
E1 Check the DTC.
(1) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS or VSC TRAC warning
lights on the combination meter.

Tc F02201

2002 4RUNNER (RM887U)

Author : Date : 400
DI-225
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM

HINT:
S If no code appears, inspect the diagnostic circuit, ABS or
VSC TRAC warning light circuit.
Trouble Area See page
Tc terminal circuit DI-370
ABS warning light circuit DI-351
VSC TRAC warning light circuit DI-354

S As an example, the blinking patterns for normal code and
Normal Code codes 11 and 21 are shown on the left.
2 sec. (4) Codes are explained in the code table on page
0.25 sec.
DI-234 .
0.25 sec.
(5) After completing the check, disconnect terminals Tc
and E1 of DLC1, and turn off the display.
ON
If 2 or more malfunctions are indicated at the same time, the
lowest numbered DTC will be displayed 1st.
OFF

Code 11 and 21
0.5 sec. 0.5 sec.
1.5 sec.

4 sec. 2.5 sec.

OFF
Code 11 Code 21
R01346

Hand-held Tester (d) In case of using the hand-held tester:
Check the DTC.
(1) Hook up the hand-held tester to DLC3.
(2) Turn the ignition switch ON.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the hand-held tester operator's manual for fur-
DLC3 ther details.
F13739

(e) In case of not using the hand-held tester:
Clear the DTC.
(1) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 times or more within 5 sec.
(4) Check that the warning light shows the normal code
BR3890 blinking pattern.

2002 4RUNNER (RM887U)

Author : Date : 401
DI-226
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM

(5) Remove the SST from terminals Tc and E1 of DLC1.
SST 09843-18020

(f) In case of using the hand-held tester:
Hand-held Tester
Clear the DTC.
(1) Hook up the hand-held tester to DLC3.
(2) Turn the ignition switch ON.
(3) Operate the hand-held tester to erase the codes.
HINT:
Please refer to the hand-held tester operator's manual for fur-
ther details.
DLC3 F13739

2. In case of not using the hand-held tester:
DLC1
E1 ABS SENSOR SIGNAL CHECK (TEST MODE)
HINT:
If the ignition switch is turned from ON to ACC or LOCK during
the test mode, DTC will be erased.
(a) Procedures for the test mode:
(1) Turn the ignition switch OFF.
(2) Shift the shift lever to P range.
Ts Tc
F02201 (3) Using SST, connect terminals Ts and E1 of DLC1.
SST 09843-18020
(4) Check that the steering wheel is in the straight-
ahead position.
(5) Turn the ignition switch ON.

(6) Check that the ABS warning light blinks.
HINT:
0.13 sec. 0.13 sec. If the ABS warning light does not blink, inspect the ABS warning
light circuit or the Ts terminal circuit.
ON
Trouble Area See page
Ts terminal circuit DI-372
ABS warning light circuit DI-351
OFF
BR3904

2002 4RUNNER (RM887U)

Author : Date : 402
DI-227
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM

(b) Check the deceleration sensor.
Keep the vehicle in a stationary condition on a level place
for 1 sec. or more.
(c) Check the master cylinder pressure sensor.
Leaving the vehicle in a stationary condition and the
brake pedal in free condition for 1 sec. or more, continue
to depress the brake pedal with the force of 98 N (10 kgf,
22 lbf) or more for 1 sec. or more.
HINT:
At this time, the ABS warning light goes on for 3 sec.
(d) 4WD:
Check the center diff. lock switch.
Turn the center diff. lock switch from OFF to ON and OFF
again.
(e) 4WD:
Check the L4 position switch.
(1) Shift the transfer lever to L4 position and turn the
center diff. lock switch ON.
(2) Shift the transfer lever to H4 position.
(f) Check the speed sensor signal.
Drive the vehicle straight forward.
Drive the vehicle with a speed faster than 45 km/h (28
mph) for several seconds. Check that the ABS warning
light comes off.
HINT:
The sensor check may not be completed if the wheels spin or
the steering wheel is steered during this check.
(g) Stop the vehicle.
(h) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020
(i) Read the number of blinks of the ABS warning light.
HINT:
S See the list of DTC on the next page.
S If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
S If 2 or more malfunctions are indicated at the same time,
the lowest number code will be displayed 1st.
Malfunction Code (Example Code 72, 76)
7 2 7 6

OFF
1.5 sec. 2.5 sec. 4 sec.
0.5 sec. 0.5 sec.
0.5 sec. 0.5 sec. Repeat
BR3893

(j) After doing the check, disconnect SST from the terminals
of DLC1 and turn the ignition switch OFF.
SST 09843-18020
2002 4RUNNER (RM887U)

Author : Date : 403
DI-228
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM

Hand-held Tester 3. In case of using the hand-held tester:
ABS SENSOR SIGNAL CHECK (TEST MODE)
(a) Hook up the hand-held tester to DLC3.
(b) Do step (b) - (g) on the previous page.
(c) Read the DTC by following the prompts on the tester
screen.
HINT:
Please refer to the hand-held tester operator's manual for fur-
DLC3 F13739 ther details.

DTC of ABS sensor check function:
Code No. Diagnosis Trouble Area
S Right front speed sensor
C1271 / 71 Low output voltage of right front speed sensor S Sensor installation
S Sensor rotor
S Left front speed sensor
C1272 / 72 Low output voltage of left front speed sensor S Sensor installation
S Sensor rotor
S Right rear speed sensor
C1273 / 73 Low output voltage of right rear speed sensor S Sensor installation
S Sensor rotor
S Left rear speed sensor
C1274 / 74 Low output voltage of left rear speed sensor S Sensor installation
S Sensor rotor
C1275 / 75 Abnormal change in output voltage of right front speed sensor Right front speed sensor rotor
C1276 / 76 Abnormal change in output voltage of left front speed sensor Left front speed sensor rotor
C1277 / 77 Abnormal change in output voltage of right rear speed sensor Right rear speed sensor rotor
C1278 / 78 Abnormal change in output voltage of left rear speed sensor Left rear speed sensor rotor
S Deceleration sensor
C1279 / 79 Deceleration sensor is faulty
S Sensor installation

C1281 / 81 Master cylinder pressure sensor output signal is faulty Master cylinder pressure sensor
C1282 / 82* Transfer indicator (center diff. lock) switch malfunction Transfer indicator (center diff. lock) switch
C1283 / 83* Transfer L4 position switch malfunction Transfer L4 position switch

*: 4WD
4. In case of not using the hand-held tester:
VSC SENSOR SIGNAL CHECK (TEST MODE)
NOTICE:
When having replaced the yaw rate sensor, deceleration
sensor and/or ECU, perform zero point calibration of the
yaw rate and deceleration sensors (See step 7.).
HINT:
If the ignition switch is turned from ON to ACC or LOCK during
the test mode, DTC will be erased.
(a) Procedures for the test mode:
(1) Turn the ignition switch OFF.
(2) Check that the shift lever position is at P range. Turn
the steering wheel to the neutral position.

2002 4RUNNER (RM887U)

Author : Date : 404
DI-229
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM

(3) Using SST, connect terminals Ts and E1 of DLC1.
DLC1
E1 SST 09843-18020
(4) Start the engine.

Ts Tc
F02201

(5) Check that the VSC TRAC warning light blinks.
HINT:
0.13 sec. 0.13 sec. If the VSC TRAC warning light does not blink, inspect the VSC
TRAC warning light circuit or the Ts terminal circuit.
ON
Trouble Area See page
Ts terminal circuit DI-372
VSC TRAC warning light circuit DI-354
OFF
(b) Check the steering angle sensor.
BR3904
Turn the steering wheel either to left or right for 450

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