1.CHECK POOR CONTACT OF CONNECTOR.
Check if there is poor contact between ABSCM&H/U and ABS wheel speed sensor.
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2.CHECK HARNESS CONNECTOR BETWEEN ABSCM&H/U AND ABS WHEEL SPEED SENSOR.
1) Disconnect the connector (B301) from ABSCM&H/U.
2) Disconnect the connector from the ABS wheel speed sensor.
3) Measure the resistance between ABSCM&H/U connector and ABS wheel speed sensor connector.
Connector & terminal
DTC C0101
(B301) No. 3 — (R72) No. 2:
(B301) No. 4 — (R72) No. 1:
DTC C0102
(B301) No. 2 — (R73) No. 2:
(B301) No. 17 — (R73) No. 1:
DTC C0103
(B301) No. 5 — (B6) No. 2:
(B301) No. 6 — (B6) No. 1:
DTC C0104
(B301) No. 16 — (B15) No. 2:
(B301) No. 1 — (B15) No. 1:
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Is the resistance less than 0.5 Ω?
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Repair the harness connector between ABSCM&H/U and ABS wheel speed sensor.
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3.CHECK GROUND SHORT OF HARNESS.
Measure the resistance between the ABSCM&H/U connector and chassis ground.
Connector & terminal
DTC C0101
(B301) No. 4 — Chassis ground:
DTC C0102
(B301) No. 17 — Chassis ground:
DTC C0103
(B301) No. 6 — Chassis ground:
DTC C0104
(B301) No. 1 — Chassis ground:
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Is the resistance 1 MΩ or more?
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Repair the harness connector between ABSCM&H/U and ABS wheel speed sensor.
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4.CHECK ABS WHEEL SPEED SENSOR POWER SUPPLY CIRCUIT.
1) Connect ABSCM&H/U connector.
2) Turn the ignition switch to ON.
3) Measure the voltage between ABS wheel speed sensor connector and chassis ground.
Connector & terminal
DTC C0101
(R72) No. 2 (+) — Chassis ground (−):
DTC C0102
(R73) No. 2 (+) — Chassis ground (−):
DTC C0103
(B6) No. 2 (+) — Chassis ground (−):
DTC C0104
(B15) No. 2 (+) — Chassis ground (−):
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5.CHECK THE ABSCM&H/U POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Turn the ignition switch to ON.
4) Measure the voltage between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 18 (+) — (B301) No. 15 (−):
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Is the voltage 10 — 15 V?
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Check the generator, battery and ABSCM&H/U power supply circuit.
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6.CHECK ABS WHEEL SPEED SENSOR SIGNAL.
1) Install the ABS wheel speed sensor.
2) Prepare an oscilloscope.
3) Check the ABS wheel speed sensor. 
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Is the pattern the same waveform as shown in the figure?
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Replace the ABS wheel speed sensor.
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7.CHECK ABSCM&H/U.
1) Connect all connectors.
2) Clear the memory.
3) Perform the Inspection Mode.
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Is the same DTC displayed?
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Replace the ABSCM only.
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8.CHECK FOR ANY OTHER DTC ON DISPLAY.
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Is any other DTC displayed?
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Check DTC using “List of Diagnostic Trouble Code (DTC)”.
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It results from a temporary noise interference.
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