Code No.P1802: Shift Lever System (LIN communication malfunction)














caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis 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.

OPERATION



DIAGNOSIS CODE SET CONDITIONS



PROBABLE CAUSES



  • Malfunction of the shift lever-ECU
  • Malfunction of the LIN bus
  • Malfunction of TC-SST-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .) After repairing the CAN bus line, go to Step 2.

STEP 2. M.U.T.-III diagnosis code
Check the shift lever diagnosis code. (Refer to .)

Q. Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 3.

STEP 3. Inspection of the TC-SST-ECU connector, intermediate connector, and shift lever-ECU connector: B-125, A-65, C-58
Check for the contact with terminals.

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. Check the wiring harness between B-125 TC-SST-ECU connector terminal No.17 and C-58 shift lever-ECU connector terminal No.16.
Check the communication line for open or short circuit.

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. Replace the shift lever assembly, and check if the diagnosis code is reset.
(1)Replace the shift lever assembly. (Refer to .)
(2)Check the diagnosis code.

Q. Is diagnosis code No. P1802 set?
Replace the TC-SST assembly. (Refer to .)
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)