STEP 2. Resistance measurement at gateway-ECU (for TCU) connector and TCU connector.
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
(1) Disconnect the gateway-ECU (for TCU) connector and the TCU connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) caution | When measuring the resistance, disconnect the negative auxiliary battery terminal. For details refer to . |
Ensure that the negative battery terminal is disconnected.
(4) Continuity between gateway-ECU (for TCU) connector terminal No.6 and TCU connector terminal No.33OK: The resistance should be 2 ohms or less
(5) Continuity between gateway-ECU (for TCU) connector terminal No.5 and TCU connector terminal No.13OK: The resistance should be 2 ohms or less
Is the check result normal?
<All the resistances measure 2 ohms or less> Go to Step 3. : <Either or all of the resistances measure more than 2 ohms> Repair the intermediate connector C-253, or wiring harness between gateway-ECU (for TCU) connector and the TCU connector.