Lexus ES: Initialization Switch Error (for Test Diagnosis) (C2198)
DESCRIPTION
The switch circuit inside the combination meter assembly turns on and off according to the steering pad switch assembly operation.
During test mode, the tire pressure warning light blinks at 0.125 second intervals when "Set Pressure" is selected on the multi-information display, and illuminates when the "OK" switch (steering pad switch assembly) is pressed.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C2198 | Initialization Switch Error (for Test Diagnosis) | Test mode procedure is performed. |
| - |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the tire pressure warning ECU and receiver, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the Techstream and write them down before removal.
-
It is necessary to perform initialization
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after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.
PROCEDURE
| 1. | INSPECT STEERING PAD SWITCH ASSEMBLY |
(a) Remove the steering pad switch assembly.
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(b) Inspect the steering pad switch assembly.
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| NG |  | REPLACE STEERING PAD SWITCH ASSEMBLY |
|
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| 2. | INSPECT SPIRAL CABLE SUB-ASSEMBLY |
(a) Remove the spiral cable sub-assembly.
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(b) Inspect the spiral cable sub-assembly.
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| NG | | REPLACE SPIRAL CABLE SUB-ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the G20 spiral cable sub-assembly connector.
(b) Disconnect the G17 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G20-11 (+DP) - G17-2 (MSM+) | Always | Below 1 Ω |
| G20-11 (+DP) or G17-2 (MSM+) - Body ground | Always | 10 kΩ or higher |
| G20-10 (+DP2) - G17-3 (MSTI) | Always | Below 1 Ω |
| G20-10 (+DP2) or G17-3 (MSTI) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TIRE PRESSURE WARNING ECU AND RECEIVER) |
(a) Disconnect the N8 tire pressure warning ECU and receiver connector.
(b) Disconnect the G16 and G17 combination meter assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| N8-3 (CLSW) - G16-6 (INT) | Always | Below 1 Ω |
| N8-3 (CLSW) or G16-6 (INT) - Body ground | Always | 10 kΩ or higher |
| G17-31 (ES) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | CHECK TERMINAL VOLTAGE (INT) |
(a) Connect the N8 tire pressure warning ECU and receiver connector.
(b) Disconnect the G16 combination meter assembly connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G16-6 (INT) - Body ground | Power switch on (IG) | 8 to 15 V |
| OK | | GO TO METER / GAUGE SYSTEM |
| NG | | REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER |
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