STEP 1. Using scan tool (M.U.T.-III), read the combination meter diagnostic trouble code
Check if DTC is stored in the combination meter.(1) caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III)
."
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is stored.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC stored?
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) Turn the ignition switch to the LOCK (OFF) position.
(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) Turn the ignition switch to the ON position.
(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.-III), check data list
Check the input signal from the ignition switch (IG1) in the ETACS-ECU.- Turn the ignition switch to the ON position.
| Item No. | Item name | Normal condition | Item 254 | IG voltage | Battery positive voltage |
|
Item No. | Item name | Normal condition |
Item 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 ignition switch (IG1) signal is not received." .
STEP 6. Check of open circuit in IG1 line between the ignition switch (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