CVT Symptom Troubleshooting - HDS does not communicate with the TCM (1.5 L Engine)
HDS does not communicate with the TCM
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshots, and review the General Troubleshooting Information .
- 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. A16 No. D17 Are the fuses OK?
YES
The fuses are OK. Reinstall the fuses, then go to step 3.
NO
Replace the fuse(s), and recheck. If the fuse blows again, repair a short to ground in the blown fuse circuit(s).
- Open wire check (+B/+B TCU line)
-1. Jump the SCS line with the HDS, and wait more than 1 minute.
NOTE: This step must be done to protect the TCM from damage.
-2. Disconnect the following connector.
TCM 50P connector -3. 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 MISS SOL 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 wire is OK. Go to step 5.
NO
Repair an open in the IG1 wire between the under-dash 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. Measure the resistance 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 Is there 1.0 Ω or less?
YES (CAN gateway 12P connector type)
The GND1 (TCU) wire and the GND2 (TCU) wire are OK. Go to step 6.
YES (CAN gateway 16P connector type)
The GND1 (TCU) wire and the GND2 (TCU) wire are OK. Go to step 7.
NO
Repair an open in the GND1 (TCU) wire and/or the GND2 (TCU) wire between the TCM and ground (G151), or repair poor ground (G151).
- Open wire check (F-CAN A_H line, F-CAN A_L line)
-1. Measure the resistance between test points 1 and 2.
F-CAN A_H wire
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected Test point 1 DLC (16P) (female terminals) No. 6 : Test point 2 TCM 50P connector No. 3 F-CAN A_L wire
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected Test point 1 DLC (16P) (female terminals) No. 14 : Test point 2 TCM 50P connector No. 11 Is there 1.0 Ω or less?
YES
The F-CAN A_H wire and the F-CAN A_L wire are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original TCM .
NO
Repair an open in the F-CAN A_H wire and/or the F-CAN A_L wire between the DLC and the TCM.
- Open wire check (F-CAN A_H line, F-CAN A_L line)
-1. Disconnect the following connector.
CAN gateway 16P connector -2. Measure the resistance between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected CAN gateway 16P connector: disconnected Test point 1 TCM 50P connector No. 3 Test point 2 CAN gateway 16P connector (female terminals) No. 3: Test point 1 TCM 50P connector No. 11 Test point 2 CAN gateway 16P connector (female terminals) No. 11: Is there 1.0 Ω or less?
YES
The F-CAN A_H wire and the F-CAN A_L wire are OK. Go to step 8.
NO
Repair an open in the F-CAN A_H wire and/or the F-CAN A_L wire between the CAN gateway and the TCM.
- Open wire check (DIAG-CAN_H line, DIAG-CAN_L line)
-1. Measure the resistance between test points 1 and 2 individually.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected CAN gateway 16P connector: disconnected Test point 1 DLC (16P) (female terminals) No. 6: Test point 2 CAN gateway 16P connector (female terminals) No. 2: Test point 1 DLC (16P) (female terminals) No. 14: Test point 2 CAN gateway 16P connector (female terminals) No. 10: Is there 1.0 Ω or less?
YES
The DIAG-CAN_H wire and the DIAG-CAN_L wire are not open. Go to step 9.
NO
Repair an open in the DIAG-CAN_H wire and/or the DIAG-CAN_L wire between the CAN gateway and the DLC.
- Shorted wire check (DIAG-CAN_H line)
-1. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected CAN gateway 16P connector: disconnected Test point 1 DLC (16P) (female terminals) No. 6: Test point 2 Body ground Is there 1 MΩ or more?
YES
The DIAG-CAN_H wire is not shorted to ground. Go to step 10.
NO
Repair a short to ground in the DIAG-CAN_H wire between the CAN gateway and the DLC.
- Shorted wire check (DIAG-CAN_H line to DIAG-CAN_L line)
-1. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode TCM 50P connector: disconnected CAN gateway 16P connector: disconnected Test point 1 DLC (16P) (female terminals) No. 6: Test point 2 DLC (16P) (female terminals) No. 14: Is there 1 MΩ or more?
YES
The DIAG-CAN_H wire and the DIAG-CAN_L wire are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original TCM .
NO
Repair a short in the DIAG-CAN_H wire to the DIAG-CAN_L wire between the CAN gateway and the DLC.