STEP 1. Connector check: gateway-ECU connector, telematics control unit (TCU) connector and joint connector (CAN5).
STEP 2. Resistance measurement at gateway-ECU connector and joint connector (CAN5).
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect the gateway-ECU connector and the joint connector (CAN5), 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 battery terminal. For details refer to . |
Ensure that the negative battery terminal is disconnected.
(4) Continuity between gateway-ECU connector terminal No. 6 and joint connector (CAN5) terminal No. 1OK: The resistance should be 2 ohms or less
(5) Continuity between gateway-ECU connector terminal No. 5 and joint connector (CAN5) terminal No. 12OK: 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 wiring harness between gateway-ECU connector and the joint connector (CAN5).
STEP 3. Resistance measurement at gateway-ECU connector.
STEP 4. Resistance measurement at gateway-ECU connector and telematics control unit (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 . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect the gateway-ECU connector and the telematics control unit (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 battery terminal. For details refer to . |
Ensure that the negative battery terminal is disconnected.
(4) Continuity between gateway-ECU connector terminal No. 8 and telematics control unit (TCU) connector terminal No. 33OK: The resistance should be 2 ohms or less
(5) Continuity between gateway-ECU connector terminal No. 7 and telematics control unit (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 5 . <Either or all of the resistances measure more than 2 ohms> Repair the wiring harness between gateway-ECU connector and the telematics control unit (TCU) connector.
STEP 5. Resistance measurement at gateway-ECU connector (short to ground check)
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect the gateway-ECU connector and telematics control unit (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 battery terminal. For details refer to . |
Ensure that the negative battery terminal is disconnected.
(4) Measure the resistance between gateway-ECU connector terminal No. 8 and body ground. <CAN_H>OK: 1 kΩ or more
(5) Measure the resistance between gateway-ECU connector terminal No. 7 and body ground. <CAN_L>OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 6 . <Less than 1 kΩ> Repair the wiring harness between the gateway-ECU connector and telematics control unit (TCU) connector.
STEP 6. Voltage measurement at gateway-ECU connector (short to power supply check)
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to |
(1) Disconnect the gateway-ECU connector and telematics control unit (TCU) connector and measure at the wiring harness side.
(2) Connect the negative battery terminal, and turn the ignition switch to the "ON" position.
(3) Measure the voltage between gateway-ECU connector terminal No. 8 and body ground. <CAN_H>OK: 1.0 volt or less
(4) Measure the voltage between gateway-ECU connector terminal No. 7 and body ground. <CAN_L>OK: 1.0 volt or less
Is the check result normal?
<1.0 volt or less> Go to Step 7. <More than 1.0 volt> Repair the wiring harness between the gateway-ECU connector and telematics control unit (TCU) connector.
STEP 7. Resistance measurement at gateway-ECU connector (line-to-line short check)
caution | A digital multimeter should be used. For details refer to . |
caution | The test wiring harness should be used. For details refer to . |
caution | Strictly observe the specified wiring harness repair procedure. For details refer to . |
(1) Disconnect the gateway-ECU connector and telematics control unit (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 battery terminal. For details refer to . |
Ensure that the negative battery terminal is disconnected.
(4) Measure the resistance between gateway-ECU connector terminal Nos. 8 and 7.OK: 1 kΩ or more
Is the check result normal?
<1 kΩ or more> Go to Step 8. <Less than 1 kΩ> Repair the wiring harness between the gateway-ECU connector and telematics control unit (TCU) connector.
STEP 8. Resistance measurement at gateway-ECU connector.
caution | A digital multimeter should be used. For details refer to . |
(1) Remove the gateway-ECU, and measure at the equipment side.
(2) Resistance at gateway-ECU connector terminal Nos. 8 and 7OK: 120 ± 20 ohms
Is the check result normal?
<Within 120 ± 20 ohms> Go to Step 9. <Not within 120 ± 20 ohms> Replace the gateway-ECU.
STEP 9. Resistance measurement at telematics control unit (TCU) connector.
caution | A digital multimeter should be used. For details refer to . |
(1) Remove the telematics control unit (TCU), and measure at the equipment side.
(2) Resistance at telematics control unit (TCU) connector terminal Nos. 33 and 13OK: 120 ± 20 ohms
Is the check result normal?
<Within 120 ± 20 ohms> The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ). <Not within 120 ± 20 ohms> Replace the telematics control unit (TCU).