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 ohms 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 ohms 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: The voltage should measure approximately 12 volts (battery positive 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: The voltage should measure approximately 12 volts (battery positive 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