Page 2273 of 2890
I: TROUBLE CODE 51
—FAULTY VALVE RELAY—
DIAGNOSIS:
Faulty valve relay
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check resistance of valve relay.
OK
Not OK
Replace valve relay.
2. Check contact point of valve relay.
OK
Not OK
Replace valve relay.
3. Check short circuit of valve relay.
OK
Not OK
Replace valve relay.
4. Check input voltage of valve relay.
OK
Not OK
Repair harness/connector.
5. Check ground circuit of valve relay.
OK
Not OK
Repair harness/connector.
6. Check harness between ABS/TCS control
module and valve relay.
OK
Not OK
Repair harness/connector.
7. Check resistance of valve relay to ABS/TCS
control module side.
OK
Not OK
Repair harness/connector.
8. Check body short of harness.
OK
Not OK
Repair harness.
Replace ABS/TCS control module.
62
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2274 of 2890
B4M0440
B4M0441
1. CHECK RESISTANCE OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Remove valve relay.
3) Measure resistance between valve relay terminals.
Terminal / Specified resistance:
No. A—B / 90±10Ω
B4M0442
2. CHECK CONTACT POINT OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Remove valve relay.
3) Attach circuit tester probes to terminals as shown in
figure.
4) Measure resistance between respective terminals.
Terminal / Specified resistance:
No. C—E/1Ωor less (When 12 volts applied.)
No. C—E/1MΩor more
(When no voltage is applied.)
No. C—F/1MΩor more
(When 12 volts applied.)
No. C—F/1Ωor less
(When no voltage is applied.)
63
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2275 of 2890
B4M0443
3. CHECK SHORT CIRCUIT OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Remove valve relay.
3) Measure resistance between valve relay terminals.
Terminal / Specified resistance:
No. B—F/1MΩor more
B4M0444A
4. CHECK INPUT VOLTAGE OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Disconnect valve relay.
3) Measure voltage between valve relay connector and
body.
Connector & terminal / Specified voltage:
(F11) No. 1—body/0V
(F11) No. 3—body / 10—13 V
4) Turn ignition switch ON.
5) Measure voltage between valve relay connector and
body.
Connector & terminal / Specified voltage:
(F11) No. 1—body / 10—13 V
(F11) No. 3—body / 10—13 V
B4M0445A
5. CHECK GROUND CIRCUIT OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Disconnect valve relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between valve relay connector and
body.
Connector & terminal / Specified resistance:
(F11) No. 6—body / 1Ωor less
64
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2276 of 2890

B4M0446A
6. CHECK HARNESS BETWEEN ABS/TCS CONTROL
MODULE AND VALVE RELAY.
1) Turn ignition switch OFF.
2) Disconnect valve relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P6) No. 6—body/1MΩor more
5) Connect valve relay.
6) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P6) No. 6—body / 1Ωor less
B4M0447A
7. CHECK RESISTANCE OF VALVE RELAY TO ABS/
TCS CONTROL MODULE SIDE.
1) Turn ignition switch OFF.
2) Connect valve relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector terminals.
Connector & terminal / Specified resistance:
(P5) No. 1—(P6) No. 1 / 90±10Ω
B4M0729A
8. CHECK BODY SHORT OF HARNESS.
1) Turn ignition switch OFF.
2) Connect valve relay.
3) Disconnect ABS/TCS control module.
4) Turn ignition switch ON.
5) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 1—body / 10—13 V
65
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2277 of 2890

J: TROUBLE CODE 52
—FAULTY MOTOR, MOTOR SENSOR AND/
OR MOTOR RELAY—
DIAGNOSIS:
Faulty motor relay
Faulty motor
Faulty motor sensor
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check resistance of motor relay.
OK
Not OK
Replace motor relay.
2. Check input voltage of motor relay.
OK
Not OK
Repair harness/connector.
3. Check body short of harness.
OK
Not OK
Repair harness.
4. Check harness between ABS/TCS control
module and motor relay.
OK
Not OK
Repair harness/connector.
5. Check motor operation.
OK
Not OK
Go to step 10.
6. Check resistance of motor sensor.
OK
Not OK
Replace hydraulic unit.
7. Check body short of motor sensor.
OK
Not OK
Replace hydraulic unit.
8. Check harness between ABS/TCS control
module and motor sensor.
OK
Not OK
Repair harness/connector.
9. Check body short of motor sensor harness.
OK
Not OK
Repair harness.
Replace ABS/TCS control module.
66
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2278 of 2890
10. Check contact point of motor relay.
OK
Replace motor relay.
11. Check harness between motor and motor
relay.
OK
Repair harness/connector.
12. Check body short of motor harness.
OK
Repair harness.
13. Check ground circuit of motor.
OK
Repair harness/connector.
Replace hydraulic unit.
B4M0741
67
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2279 of 2890

B4M0730A
1. CHECK RESISTANCE OF MOTOR RELAY.
1) Turn ignition switch OFF.
2) Remove motor relay.
3) Measure resistance between motor relay terminals.
Terminal / Specified resistance:
No. a—b/57Ω
NOTE:
Apply + to b terminal.
Apply to a terminal.
B4M0451A
2. CHECK INPUT VOLTAGE OF MOTOR RELAY.
1) Turn ignition switch OFF.
2) Disconnect motor relay.
3) Measure voltage between motor relay connector and
body.
Connector & terminal / Specified voltage:
(F10) No. 1—body / 10—13 V
(F10) No. 3—body/0V
4) Turn ignition switch ON.
5) Measure voltage between motor relay connector and
body.
Connector & terminal / Specified voltage:
(F10) No. 1—body / 10—13 V
(F10) No. 3—body / 10—13 V (In 1 second after
turning ignition key ON.)
B4M0452A
3. CHECK BODY SHORT OF HARNESS.
1) Turn ignition switch OFF.
2) Disconnect motor relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P6) No. 9—body/1MΩor more
68
4-4bBRAKES
8. Diagnostics Chart with Trouble Code
Page 2280 of 2890

B4M0731A
4. CHECK HARNESS BETWEEN ABS/TCS CONTROL
MODULE AND MOTOR RELAY.
1) Turn ignition switch OFF.
2) Connect motor relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector and body.
NOTE:
Apply + to GND.
Apply to (P6) No. 9.
Connector & terminal / Specified resistance:
(P6) No. 9—body / 57±6Ω
5. CHECK MOTOR OPERATION.
1) Connect motor relay.
2) Connect ABS/TCS control module.
3) Operate the TCS sequence check.
4) By the whirring sound check that the motor rotates.
B4M0454A
6. CHECK RESISTANCE OF MOTOR SENSOR.
1) Turn ignition switch OFF.
2) Disconnect motor sensor connector.
3) Measure resistance between motor sensor connector
terminals.
Connector & terminal / Specified resistance:
(F14) No. 1—No.2/72—98Ω
B4M0455A
7. CHECK BODY SHORT OF MOTOR SENSOR.
1) Turn ignition switch OFF.
2) Disconnect motor sensor connector.
3) Measure resistance between motor sensor connector
and body.
Connector & terminal / Specified resistance:
(F14) No. 1—body/1MΩor more
(F14) No. 2—body/1MΩor more
69
4-4bBRAKES
8. Diagnostics Chart with Trouble Code