P1875
DTC P1875: Damper Speed Sensor System (Poor performance)CAUTION:
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
DIAGNOSTIC FUNCTION
TC-SST-ECU checks that the damper (closer to the engine than input shaft) is normal.
DESCRIPTIONS OF MONITOR METHODS
The damper speed sensor is determined to be abnormal.
MONITOR EXECUTION
^ Continuous
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
^ P0715: Input shaft 1 (odd number gear axle) speed sensor system (Output high range out)
^ P0716: Input shaft 1 (odd number gear axle) speed sensor system (Poor performance)
^ P0717: Input shaft 1 (odd number gear axle) speed sensor system (Output low range out)
^ P2766: Input shaft 2 (even number gear axle) speed sensor system (Poor performance)
Sensor (The sensor below is determined to be normal)
^ Input shaft 1 (odd number gear axle) speed sensor
^ Input shaft 2 (even number gear axle) speed sensor
LOGIC FLOW CHARTS (Monitor Sequence)
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS
Check Conditions
^ Voltage of battery: 8 V or more.
^ Voltage of battery: 16.5 V or less.
^ Engine speed: 500 r/min or more.
^ Time since above engine condition: 400 millisecond.
JUDGMENT CRITERIA
^ Sensor output speed: 16,000 r/min or more. (400 millisecond)
^ "Engine speed via CAN"-"Sensor output speed": 500 r/min or more. (500 millisecond)
OBD-II DRIVE CYCLE PATTERN
^ The output of the sensor remains 16,000 r/min or less for 400 milliseconds.
^ The value of the "Engine speed via CAN"-"Sensor output speed"remains 500 r/min or less for 500 milliseconds.
PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES: Go to Step 2.
NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1875 set?
YES: Replace the TC-SST assembly.
NO: Intermittent malfunction.