STEP 2. Charging system check
STEP 3. Using scan tool (M.U.T.-IIISE), check the data list.
STEP 4. Voltage measurement at the EPS-ECU connector (+B, GND terminal)
(1) Disconnect the EPS-ECU connector.
(2) Measure the EPS-ECU voltage at the connector side.
(3) Engine start
(4) Measure the voltage between the EPS-ECU connector (+B terminal) and the EPS-ECU connector (GND terminal) or body ground.OK: Approximately battery positive voltage
Is the check result normal?
Go to Step 8. Go to Step 5.
STEP 5. Check of open circuit in GND line between EPS-ECU connector and body ground.
STEP 6. Check the fusible link.
STEP 7. Check of short to power supply, short to ground, and open circuit in +B line between fusible link and EPS-ECU connector
STEP 8. Voltage measurement at the EPS-ECU connector (IG1, GND terminal)
(1) Disconnect the EPS-ECU connector.
(2) Measure the EPS-ECU voltage at the connector side.
(3) Engine start
(4) Measure the voltage between the EPS-ECU connector (IG1 terminal) and the EPS-ECU connector (GND terminal) or body ground.OK: Approximately battery positive voltage
Is the check result normal?
Go to Step 10. Go to Step 9.
STEP 9. Check of short to power supply, short to ground, and open circuit in IG1 line between EPS-ECU connector and ETACS-ECU connector
STEP 10. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
(1) Engine start
(2) Check if the DTC is set.
Is the DTC set?
Replace the EPS-ECU (Refer to ). Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).