VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT
DTC detecting condition:
• Defective ABS wheel speed sensor (broken wire, input voltage too high)
• Defective harness connector
Trouble symptom:
• ABS does not operate.
• VDC does not operate.
• EyeSight does not operate.
Wiring diagram:
Vehicle dynamics control system Vehicle Dynamics Control System > WIRING DIAGRAM">
STEP | CHECK | YES | NO |
1.CHECK POOR CONTACT OF CONNECTOR.
Check if there is poor contact between VDCCM&H/U and ABS wheel speed sensor.
Is there poor contact?
Repair the connector.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 2.
2.CHECK HARNESS CONNECTOR BETWEEN VDCCM&H/U AND ABS WHEEL SPEED SENSOR (CHECK FOR OPEN CIRCUIT).
1) Turn the ignition switch to OFF.
2) Disconnect the connector (B310) from the VDCCM&H/U.
3) Disconnect the connector from ABS wheel speed sensor.
4) Measure the resistance between VDCCM&H/U connector and ABS wheel speed sensor connector.
Connector & terminal
DTC C0021
(B310) No. 6 — (B6) No. 1:
(B310) No. 5 — (B6) No. 2:
DTC C0023
(B310) No. 8 — (B15) No. 1:
(B310) No. 9 — (B15) No. 2:
DTC C0025
(B310) No. 12 — (R72) No. 1:
(B310) No. 11 — (R72) No. 2:
DTC C0027
(B310) No. 2 — (R73) No. 1:
(B310) No. 3 — (R73) No. 2:
Is the resistance less than 1 ??
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 3.
Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
3.CHECK GROUND SHORT OF HARNESS.
Measure the resistance between VDCCM&H/U connector and chassis ground.
Connector & terminal
DTC C0021
(B310) No. 6 — Chassis ground:
DTC C0023
(B310) No. 8 — Chassis ground:
DTC C0025
(B310) No. 12 — Chassis ground:
DTC C0027
(B310) No. 2 — Chassis ground:
Is the resistance 1 M? or more?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 4.
Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
4.CHECK ABS WHEEL SPEED SENSOR POWER SUPPLY CIRCUIT.
1) Connect the VDCCM&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 C0021
(B6) No. 2 (+) — Chassis ground (−):
DTC C0023
(B15) No. 2 (+) — Chassis ground (−):
DTC C0025
(R72) No. 2 (+) — Chassis ground (−):
DTC C0027
(R73) No. 2 (+) — Chassis ground (−):
Is the voltage 5 — 16 V?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 6.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 5.
5.CHECK VDCCM&H/U POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the VDCCM&H/U connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between VDCCM&H/U connector terminals.
Connector & terminal
(B310) No. 1 (+) — (B310) No. 26 (−):
(B310) No. 14 (+) — (B310) No. 26 (−):
(B310) No. 20 (+) — (B310) No. 26 (−):
Is the voltage 10 — 15 V?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 6.
Check the generator, battery and VDCCM&H/U power supply circuit.
6.CHECK ABS WHEEL SPEED SENSOR SIGNAL.
1) Prepare an oscilloscope.
2) Check the ABS wheel speed sensor. Front ABS Wheel Speed Sensor > INSPECTION"> Rear ABS Wheel Speed Sensor > INSPECTION">
Does the oscilloscope indicate the waveform pattern as shown in the figure?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 7.
Replace the ABS wheel speed sensor. Front ABS Wheel Speed Sensor"> Rear ABS Wheel Speed Sensor">
7.CHECK VDCCM&H/U.
1) Connect all connectors.
2) Perform the Clear Memory Mode. Clear Memory Mode">
3) Perform the Inspection Mode. Inspection Mode">
4) Read the DTC. Read Diagnostic Trouble Code (DTC)">
Is the same DTC displayed?
Replace the VDCCM&H/U. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)">
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC C0027 REAR LEFT ABS SENSOR CIRCUIT OPEN OR SHORT">Go to Step 8.
8.CHECK DETECTION OF OTHER DTCS FOR VDC.
Read Diagnostic Trouble Code (DTC)">
Is any other DTC displayed?
Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)">
Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.
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