DTC U2516 DETECTION CONDITION AND POSSIBLE CAUSE DTC U2516 Information display CAN system communication error 16:EM2 Audio unit Device code: 16 error code:12 Car-navigation unit Device code:26 error code:81 Hands-free telephone unit (with Car-navigation system) 26:Er81 Hands-free telephone unit (without Car-navigation system) DETECTION CONDITION WARNING: Perform the following on-board diagnosis according to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] . CAN system related harness malfunction CAN system-related module malfunction POSSIBLE CAUSE Malfunction of connectors between information display, car-navigation unit or audio unit, SIRIUS satellite radio unit, hands-free telephone unit and climate control unit Open or short circuit in wiring harness Information display malfunction Climate control unit malfunction Car-navigation unit or audio unit malfunction SIRIUS satellite radio unit malfunction Hands-free telephone unit malfunction
Scheme 27
| CAUTION: When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals. | |||
|---|---|---|---|
| Step | Inspection | Action | |
| 1 | VERIFICATION BEFORE SERVICING Are any DTCs, except the following, displayed? U2516 16:Er12 Device code: 16 error code: 12 26:Er81 Device code:26 error code:81 | Yes | Determine the open circuit location referring to DETERMINE OPEN CIRCUIT LOCATION (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM] . |
| No | Go to the next step. | ||
| 2 | INSPECTION OF CONTROL MODULE CONNECTOR OUTPUTTING DTCs Inspect the terminal condition of the control module connector outputting DTCs and the mid-connector. Are the connector terminals normal without damage, deformation, corrosion, or disconnection? | Yes | Go to the next step. |
| No | Repair or replace the connector, then go to Step 9. | ||
| 3 | INSPECTION OF POWER SUPPLY OF CONTROL MODULE OUTPUTTING DTCs Refer to the terminal voltage table of the control module outputting DTCs to inspect the terminal voltage and fuse condition. Is the power supply voltage normal? | Yes | Go to the next step. |
| No | Repair or replace the connector, then go to Step 9. | ||
| 4 | INSPECTION OF BODY GROUND CONDITION OF CONTROL MODULE OUTPUTTING DTCs Inspect the body ground wires and ground point of the control module outputting DTCs. Are the ground and ground point normal? | Yes | Go to the next step. |
| No | Repair or replace the connector, then go to Step 9. | ||
| 5 | CAN SYSTEM RELATED WIRING HARNESS INSPECTION CAN system related wiring harness inspection: Short to ground Short to power supply Short between twisted pair wiring harness Open circuit Is the wiring harness normal? | Yes | Go to the next step. |
| No | Repair or replace the connector, then go to Step 9. | ||
| 6 | INSPECT INFORMATION DISPLAY Disconnect the information display connector. Measure the resistance between the following information display connector terminals: Between terminal J and terminal L (part side) Is the resistance 118-130 ohm? | Yes | Go to the next step. |
| No | Replace the information display, then go to Step 9. (See INFORMATION DISPLAY REMOVAL/INSTALLATION .) | ||
| 7 | INSPECT CLIMATE CONTROL UNIT Disconnect the climate control unit connector. Measure the resistance between the following climate control unit connector terminals: Between terminal J and terminal L (part side) Is the resistance 118-130 ohm? | Yes | Go to the next step. |
| No | Replace the climate control unit, then go to Step 9. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) | ||
| 8 | CAN RELATED MODULE VERIFICATION Remove only one of the CAN-related modules. Clear DTCs using the M-MDS. Inspect the DTCs of all modules. Are DTCs U2516, 16:Er12, Device code:16 error code:12, 26:Er81, Device code:26 error code:81 displayed? | Yes | Reinstall the removed module, remove another module and perform the same inspection. Inspect all of the CAN-related modules using the same procedure. After inspecting all of the modules, go to the next step. |
| No | Replace the removed module. | ||
| 9 | AFTER REPAIR VERIFICATION Connect all of the modules. Clear DTCs. Inspect the DTCs. Are DTCs displayed? | Yes | Perform the CAN system on-board diagnosis again according to the troubleshooting procedure (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .) |
| No | DTC troubleshooting completed. | ||
| CAUTION |
|---|
| When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals. |
DTC U2516 DIAGNOSTIC PROCEDURE