STEP 2. Resistance measurement at the B-304 ETACS-ECU connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the B-304 ETACS-ECU connector terminal No. 2 and
the body earth. OK: Continuity exists (2 Ω or less)
Q.
Is the check result normal?
Go to Step 4
Go to Step 3
STEP 3. Check the wiring harness between B-304 ETACS-ECU connector
(terminal 2) and body earth.
Check the earth wires for open circuit.
note
Before the wiring harness check, check the junction block connector B-303, joint connector
B-02 and earth connector B-25, and repair them if necessary.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunction ).
Repair the wiring harness.
STEP 4. Voltage measurement at the B-304 ETACS-ECU connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the B-304 ETACS-ECU connector terminal No. 20 and the
body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step 6
Go to Step 5
STEP 5. Check the wiring harness between the fusible link No. (25)
and the B-304 ETACS-ECU connector (terminal 20).
note
Before the wiring harness check, check the junction block connectors B-310, and repair
them if necessary.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunction ).
Repair the wiring harness.
STEP 6. Retest the system.
Check that the ETACS-ECU functions work normally.
Q.
Is the check result satisfactory?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunction )
Replace the ETACS-ECU and register the ID codes (Refer to ).
)
)
)
Go to Step 2
Repair the defective connector.
).