STEP 1. Resistance measurement at OSS-ECU connector (PGND terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the OSS-ECU connector (PGND terminal) and body ground.OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 3. Go to Step 2.
STEP 2. Check of open circuit in PGND line between OSS-ECU connector and ground joint connector
STEP 3. Resistance measurement at OSS-ECU connector (SGND terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the OSS-ECU connector (SGND terminal) and body ground.OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 5. Go to Step 4.
STEP 4. Check of open circuit in SGND line between OSS-ECU connector and ground joint connector
STEP 5. Voltage measurement at OSS-ECU connector (+B1 terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the voltage between the OSS-ECU connector (+B1 terminal) and body ground.OK: System voltage
Is the check result normal?
Go to Step 7. Go to Step 6.
STEP 6. Check of short to power supply, short to ground, and open circuit in +B1 line between fusible link and OSS-ECU connector
STEP 7. Voltage measurement at OSS-ECU connector (+B2 terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the voltage between the OSS-ECU connector (+B2 terminal) and body ground.OK: System voltage
Is the check result normal?
Replace the OSS-ECU and register the VIN (Refer to ). Go to Step 8.
STEP 8. Check of short to power supply, short to ground, and open circuit in +B1 line between fusible link and OSS-ECU connector