STEP 1. Using scan tool (M.U.T.-IIISE), read the combination meter DTC
Check if DTC is set in the combination meter.(1) caution | To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE). |
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)
."
(2) Press the electric motor switch to turn on the power supply mode.
(3) Check if DTC is set.
(4) Press the electric motor switch to turn off the power supply mode.
Is the DTC set?
Troubleshoot the combination meter (Refer to ). Go to Step 2.
STEP 2. Voltage measurement at the combination meter connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Press the electric motor switch to turn off the power supply mode.
(3) Measure the voltage between the combination meter connector (B+B terminal) and ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 4. Go to Step 3.
STEP 3. Check of open circuit in B+B line between the fusible link and combination meter connector.
STEP 4. Voltage measurement at the combination meter connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Press the electric motor switch to turn on the power supply mode.
(3) Measure the voltage between the combination meter connector (IG1 terminal) and ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 7. Go to Step 5.
STEP 5. Using scan tool (M.U.T.-IIISE), check data list
Check the input signal from the OSS-ECU (IG1) signal in the ETACS-ECU.- Press the electric motor switch to turn on the power supply mode.
| Item No. | Item name | Normal condition | 254 | IG voltage | Battery positive voltage |
|
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 6. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The OSS-ECU (IG1) signal is not received." .
STEP 6. Check of open circuit in IG1 line between the OSS-ECU (IG1) and combination meter connector.
STEP 7. Resistance measurement at the combination meter connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the combination meter connector (GND terminal) and ground.OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 9. Go to Step 8.
STEP 8. Check of open circuit in GND line between combination meter connector and ground.
STEP 9. Retest the system