STEP 1. Using scan tool (M.U.T.-III), check data list.
(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 Scan Tool (M.U.T.-III)
."
(2) Check the input signal of ACC relay.- Turn the ignition switch to the ACC position.
| Item No. | Item name | Normal condition | 288 | ACC switch | ON |
|
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 2. Refer to ETACS - Input Signal Procedure 1 "The ignition switch (ACC) signal is not sent to the ETACS-ECU ."
STEP 2. Check ETACS-ECU connector C-415, C-417 and multivision display connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 3. Check the wiring harness between ETACS-ECU connector C-417 (terminal 1) and multivision display connector C-138 (terminal 30).
Check the power supply lines (battery power supply) for open circuit and short circuit.note | Also check intermediate connector C-127, C-128, joint connector C-149 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-127, C-128, joint connector C-149 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection. |
Is the wiring harness between ETACS-ECU connector C-417 (terminal 1) and multivision display connector C-138 (terminal 30) in good condition?
Go to Step 4. The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 4. Check the power supply circuit to the multivision display. Measure the voltage at multivision display connector C-138.
(1) Disconnect the connector, and measure at the wiring harness-side connector.
(2) Measure the voltage between terminal 21 and ground.OK: Battery positive voltage
Is the measured voltage battery positive voltage?
Go to Step 6. Go to Step 5.
STEP 5. Check the wiring harness between ETACS-ECU connector C-415 (terminal 9) and multivision display connector C-138 (terminal 21).
STEP 6. Check the ground circuit to the multivision display connector. Measure the resistance at multivision display connector C-138.
(1) Disconnect multivision display connector C-138, and measure the resistance available at the wiring harness side of the connector.
(2) Measure the resistance between multivision display connector C-138 terminal 40 and ground.OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 8. Go to Step 7.
STEP 7. Check the wiring harness between multivision display connector C-138 (terminal 40) and grounding connector C-01 (terminal 11).
STEP 8. Retest the system.