P1887
DTC P1887: Shift fork 3 jump outCAUTION
^ 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 movement of the shift fork 3 is normal.
DESCRIPTIONS OF MONITOR METHODS
The movement of the shift fork 3 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)
^ Not applicable
Sensor (The sensor below is determined to be normal)
^ Not applicable
LOGIC FLOW CHARTS (Monitor Sequence) [Functional check - 6th gear]
DTC SET CONDITIONS [FUNCTIONAL CHECK - 6TH GEAR]
Check Conditions
^ Voltage of battery: 8 V or more.
^ Voltage of battery: 16.5 V or less.
^ Engine speed: 650 r/min or more.
^ Time since above engine condition: 1.5 second or more.
^ Shift fork 3 current gear: 6th gear.
JUDGMENT CRITERIA
^ Shift fork position: - 6 mm (- 0.24 inch) or more, and input shaft 2 (even) speed: 500 r/min or more, or synchro (6th gear) slip speed: 80 r/min or more. (400 millisecond)
OBD-II DRIVE CYCLE PATTERN [FUNCTIONAL CHECK - 6TH GEAR]
The status with the shift fork position - 6 mm (- 0.24 inch) or less, or with the input shaft 2 (even) speed 500 r/min or less and with the synchro (6th gear) slip speed 80 r/min or less continues for 400 milliseconds.
PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
^ Malfunction of TC-SST shift fork
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. P1887 set?
YES: Replace the TC-SST assembly.
NO: Intermittent malfunction. (Refer to How to Cope with Intermittent Malfunction.)