CVT Symptom Troubleshooting - HDS does not communicate with the TCM (CVT: With ACC)
- CVT system communication check
-1. Connect the HDS to the DLC .
-2. Turn the vehicle to the ON mode.
-3. Check the Mode Menu of the CVT system with the HDS.
Does the HDS show the Mode Menu of the CVT system?
YES
The CVT system communication is OK. Intermittent failure, the system is OK at this time.
NO
Go to step 2.
- Fuse check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check the following fuses.
Fuse No. A10 No. A39 Are the fuses OK?
YES
The fuses are OK. Reinstall the fuses, then go to step 3.
NO
Replace faulty fuse, and recheck. If the fuse blows again, repair a short to ground in the blown fuse circuit.
- Open wire check (+B/+B TCU line)
-1. Disconnect the following connector.
TCM 50P connector -2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected Test point 1 TCM 50P connector No. 1 Test point 2 Body ground Is there battery voltage?
YES
The +B/+B TCU wire is OK. Go to step 4.
NO
Repair an open in the +B/+B TCU wire between the under-hood fuse/relay box and the TCM.
- Open wire check (IG1/IG1 line)
-1. Turn the vehicle to the ON mode.
-2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode TCM 50P connector: disconnected Test point 1 TCM 50P connector No. 8 Test point 2 Body ground Is there battery voltage?
YES
The IG1/IG1 wire is OK. Go to step 5.
NO
Repair an open in the IG1/IG1 wire between the under-hood fuse/relay box and the TCM.
- Open wire check (GND1 (TCU) line, GND2 (TCU) line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected Test point 1 TCM 50P connector No. 9 TCM 50P connector No. 10 Test point 2 Body ground Are there continuity?
YES
The GND1 (TCU) wire and the GND2 (TCU) wire are OK. Go to step 6.
NO
Repair an open in the GND1 (TCU) wire and/or the GND2 (TCU) wire between the TCM and ground (G201), or repair poor ground (G201).
- Open wire check (F-CAN A_H line, F-CAN A_L line)
-1. Disconnect the following connector.
CAN gateway 16P connector -2. Check for continuity between test points 1 and 2.
F-CAN A_H wire
Test condition Vehicle OFF (LOCK) mode CAN gateway 16P connector: disconnected TCM 50P connector: disconnected Test point 1 CAN gateway 16P connector (female terminals) No. 3 : Test point 2 TCM 50P connector No. 3 F-CAN A_L wire
Test condition Vehicle OFF (LOCK) mode CAN gateway 16P connector: disconnected TCM 50P connector: disconnected Test point 1 CAN gateway 16P connector (female terminals) No. 11 : Test point 2 TCM 50P connector No. 11 Is there continuity?
YES
The F-CAN_H wire and the F-CAN_L wire are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If the symptom goes away and the TCM was substituted, replace the original TCM .
NO
Repair an open in the F-CAN_H wire and/or the F-CAN_L wire between the CAN gateway and the TCM.