Diagnostic Item 16: Diagnose when the scan tool cannot receive the data sent by ASC-ECU: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Connector check: joint connector (CAN1) and ASC-ECU connector
CAUTION: The strand end of the twist wire should be within 10 cm from the connector. For details refer to SERVICE PRECAUTIONS .

When checking the joint connector, ensure that its wiring harness side and its short pins are not damaged.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the defective connector. Replace the joint connector as necessary.
STEP 2. Resistance measurement at joint connector (CAN1) and ASC-ECU connector.
CAUTION: A digital multimeter should be used. For details refer to SERVICE PRECAUTIONS .

CAUTION: The test wiring harness should be used. For details refer to SERVICE PRECAUTIONS .
1. Disconnect joint connector (CAN1) and the ASC-ECU connector, and measure at the wiring harness side.
2. Turn the ignition switch to the LOCK (OFF) position.
  CAUTION: When measuring the resistance, disconnect the negative battery terminal. For details refer to SERVICE PRECAUTIONS .
3. Ensure that the negative battery terminal is disconnected.
4. Continuity between joint connector (CAN1) terminal No.9 and ASC-ECU connector terminal No.11
  OK: Continuity (2 ohms or less)
5. Continuity between joint connector (CAN1) terminal No.20 and ASC-ECU connector terminal No.10
  OK: Continuity (2 ohms or less)
Q: Is the check result normal?
1. YES: < All the resistances measure 2 ohms or less > Power supply to the ASC-ECU may be suspected. Diagnose the ASC Refer to DIAGNOSIS .
2. NO: < Either or all of the resistances measure more than 2 ohms > Repair the wiring harness between joint connector (CAN1) and the ASC-ECU connector.