When ID registration is being performed via the automatic ID registration function, the tire pressure warning ECU and receiver stores C2128 and the tire pressure warning light blinks.
When the tire pressure warning ECU receives data from all registered tire pressure warning valve and transmitters and the system is judged to be normal, the tire pressure warning light turns off.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C2128 | Auto ID Under Registration | ID registration is being performed via the automatic ID registration function | Electronically controlled brake system | - |
Turn the ignition switch to ON.
Check if the electronically controlled brake system DTCs are output.
If DTC C2128 is stored, electronically controlled brake system DTCs may also be stored. If electronically controlled brake system DTCs are stored, perform troubleshooting for the electronically controlled brake system before performing ID registration via the automatic ID registration function.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
A
B
Turn the ignition switch off.
Turn the ignition switch to ON.
Perform ID registration for the tire pressure warning ECU and receiver (ID registration via the automatic ID registration function).
Perform the following procedures within 1 trip and do not turn the ignition switch off.
| Proceed to |
|---|
| NEXT |
NEXT
Connect the GTS to the DLC3.
Turn the GTS on.
Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
According to the display on the GTS, display the ECU Data List.
| Tester Display |
|---|
| [RAM] Auto ID Registered FL Wheel Judgment Status |
| [RAM] Auto ID Registered FR Wheel Judgment Status |
| [RAM] Auto ID Registered RL Wheel Judgment Status |
| [RAM] Auto ID Registered RR Wheel Judgment Status |
Refer to the following chart and check the "[RAM] Auto ID Registered Wheel Judgment Status" of each transmitter.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| [RAM] Auto ID Registered FL Wheel Judgment Status | FL wheel registration status during automatic ID registration (RAM) | Fixed, Under a Judgment of Side by Side Car Influence or Under a Judgment, Not Registered | Actual registration status | Cleared each time the ignition switch is turned to ON from off. |
| [RAM] Auto ID Registered FR Wheel Judgment Status | FR wheel registration status during automatic ID registration (RAM) | Fixed, Under a Judgment of Side by Side Car Influence or Under a Judgment, Not Registered | Actual registration status | Cleared each time the ignition switch is turned to ON from off. |
| [RAM] Auto ID Registered RL Wheel Judgment Status | RL wheel registration status during automatic ID registration (RAM) | Fixed, Under a Judgment of Side by Side Car Influence or Under a Judgment, Not Registered | Actual registration status | Cleared each time the ignition switch is turned to ON from off. |
| [RAM] Auto ID Registered RR Wheel Judgment Status | RR wheel registration status during automatic ID registration (RAM) | Fixed, Under a Judgment of Side by Side Car Influence or Under a Judgment, Not Registered | Actual registration status | Cleared each time the ignition switch is turned to ON from off. |
| Result | Proceed to |
|---|---|
| "Under a Judgment of Side by Side Car Influence or Under a Judgment" is displayed for 1 or more "[RAM] Auto ID Registered Wheel Judgment Status" Data List items. | A |
| "Under a Judgment of Side by Side Car Influence or Under a Judgment" is not displayed for any "[RAM] Auto ID Registered Wheel Judgment Status" Data List items. | B |
A
B
Perform ID registration for the tire pressure warning ECU and receiver (ID registration via GTS).
| Proceed to |
|---|
| NEXT |
NEXT
Explain to customer that there is a high possibility that they traveled in close proximity to another vehicle with the same type of tire pressure warning valve and transmitter during ID registration via the automatic ID registration function.
Perform ID registration for the tire pressure warning ECU and receiver (ID registration via GTS).
| Proceed to |
|---|
| NEXT |
NEXT
Explain to the customer that the time required for registration to complete varies depending on the driving conditions and circumstances.
Registration may take longer than normal in the following situations.
The vehicle is stopped frequently
The vehicle is stopped for long period of time
The vehicle is driven in reverse
The vehicle is driven on rough roads or uneven surfaces
The vehicle was not stopped for 15 minutes or more before registration
The vehicle is driven at 40 km/h (25 mph) or less for a long period of time
The ignition switch is turned off during ID registration