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Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- MB991223: Harness Set
- MB992006: Extra Fine Probe
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Use scan tool to diagnose the CAN bus line (Refer to GROUP 54C, Explanation About The
Scan Tool Can Bus Diagnostics .)
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Q.
Is the check result satisfactory?
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Repair the CAN bus line (Refer to GROUP 54C, Diagnosis -
Can Bus Diagnostic
Table .) Then go to Step 23.
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Using scan tool to check the MFI system actuator test (Refer to GROUP 13B, MFI Diagnosis -
Diagnostic
Function .)
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- Item 14: Cooling fan
(Refer to GROUP 13B, MFI Diagnosis -
Actuator Test Reference Table .)
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Q.
Is the check result normal?
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Using scan tool to read the MFI system DTC (Refer to GROUP 13B, MFI Diagnosis -
Diagnostic
Function .)
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Repair the MFI system (Refer to GROUP 13B, MFI Diagnosis -
Diagnostic
Trouble Code Chart .) Then go to Step 23.
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Using scan tool to read the ASC system DTC (Refer to GROUP 35C, Diagnosis -
Diagnostic
Function .)
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Repair the ASC system (Refer to GROUP 35C, Diagnosis -
Diagnostic Trouble
Code Chart .) Then go to Step 23.
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Using scan tool to read the A/C system DTC (Refer to GROUP 55B, Auto A/C Diagnosis -
Diagnostic
Function .)
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Repair the A/C system (Refer to GROUP 55B, Auto A/C Diagnosis -
Diagnostic
Trouble Code Chart .) Then go to Step 23.
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Using scan tool to read the ETACS system DTC (Refer to GROUP 54A, ETACS, Troubleshooting -
Diagnostic
Function .)
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Repair the ETACS system (Refer to GROUP 54A, ETACS, Troubleshooting -
Diagnostic
Trouble Code Chart .) Then go to Step 23.
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(1)Disconnect the ETACS-ECU connector C-312, and measure at front wiring harness connector
side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure the terminal voltage between ETACS-ECU connector C-312 terminal number
2 and body ground, between ETACS-ECU connector C-312 terminal number 8 and body ground, and
between ETACS-ECU connector C-312 terminal number 9 and body ground. OK: Battery positive voltage
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Q.
Is the check result normal?
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Refer to GROUP 00E, Harness Connector Inspection .
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Q.
Is the connectors and terminals in good condition?
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Repair or replace the damaged connector. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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Q.
Is the relay in good condition?
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Replace the damaged relay. Then go to Step 23.
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Q.
Is the fusible link in good condition?
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Replace the damaged fusible link. Then go to Step 23.
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Refer to GROUP 00E, Harness Connector Inspection .
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Q.
Is the connectors and terminals in good condition?
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Repair or replace the damaged connector. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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- Check harness wire for open/short circuit and damage.
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Q.
Is the harness wires in good condition?
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Repair or replace the damaged harness wire. Then go to Step 23.
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Q.
Is the relay in good condition?
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Replace the damaged relay. Then go to Step 23.
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Q.
Is the fan motor in good condition?
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Replace the damaged fan motor (Refer to .) Then
go to Step 23.
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Using scan tool to read the ETACS system DTC (Refer to GROUP 54A, ETACS, Troubleshooting -
Diagnostic
Function .)
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Replace the ETACS-ECU (Refer to GROUP 54A, ETACS -
ETACS-ECU .)
Then go to Step 23.
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Using scan tool to check the MFI system actuator test (Refer to GROUP 13B, MFI Diagnosis -
Diagnostic
Function .)
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- Item 14: Cooling fan
(Refer to GROUP 13B, MFI Diagnosis -
Actuator Test Reference Table )
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Q.
Is the check result normal?
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Replace the ECM [Refer to GROUP 13B, Engine Control Module (ECM) .]
When
the ECM is replaced, register the encrypted code (Refer to GROUP 42C, Diagnosis -
ID
Code Registration Judgment Table .) Then go to Step 23.
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Q.
Does the radiator fan and condenser fan operate normal?
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An intermittent malfunction is suspected (Refer to GROUP 00, How to use troubleshooting -
How
to Cope with Intermittent Malfunction .)
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Replace the ECM [Refer to GROUP 13B, Engine Control Module (ECM) .]
When
the ECM is replaced, register the encrypted code (Refer to GROUP 42C, Diagnosis -
ID
Code Registration Judgment Table .) Then go to Step 23.
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Q.
Does the radiator fan and condenser fan operate normal?
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The procedure is complete.
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