C1285 Vacuum Sensor Malfunction

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Diag Code: 85

DESCRIPTION
DTC C1285 can be deleted when the vacuum sensor sends a vacuum signal or the Test Mode ends.
DTC C1285 is output only in the Test Mode.

DTC Code Diag Code DTC Detection Condition Trouble Area
C1265 65 When any of the following is detected:
  1. When IG1 terminal voltage is 20 to 32 V, VCM terminal voltage is not between 4.3 and 5.8 V for 1.2 seconds or more.
  2. Either PIM or PIM2 terminal voltage is not between 0.4 and 4.5 V for 1.2 seconds or more.
  3. After the stop light switch is turned off with PMC terminal voltage 1 V or more, either PIM or PIM2 terminal voltage does not change by 0.01 V in 1 second.
  4. Noise occurs in either PIM or PIM2 terminal voltage at least 7 times for 5 seconds.
  5. Difference between PIM and PIM2 terminal voltages is 344 mV or more for 10 seconds or more.
• Vacuum sensor
• Vacuum sensor circuit
• Skid control ECU
C1285 85 Detected only during Test Mode. Vacuum sensor

WIRING DIAGRAM


INSPECTION PROCEDURE

1.CHECK STOP LIGHT OPERATION

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2.CHECK VACUUM HOSE

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3.INSPECT VACUUM SENSOR

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4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VACUUM SENSOR)

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5.INSPECT SKID CONTROL ECU (SENSOR INPUT)

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6.RECONFIRM DTC

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7.INSPECT SKID CONTROL ECU (STP TERMINAL)

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8.DTC Clear

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