B1092 – Poor reception of ETACS signal MMC Colt

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COMMENTS ON TROUBLE SYMPTOM

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PROBABLE CAUSE

Malfunction of the blower switch

Damaged wiring harness or connectors

Malfunction of the ETACS-ECU

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DIAGNOSIS PROCEDURE

STEP 1. Check the blower system.

Q. Does the blower motor work normally?

STEP 2. Connector check: B-232 ETACS-ECU connector

Q. Is the check result normal?

STEP 3. Voltage measurement at B-232 ETACS-ECU connector.

Q. Is the check result normal?

STEP 4. Check the wiring harness between B-232 ETACS-ECU connector terminal No.24 and B-114 blower switch connector terminal No.1.

Check the blower relay power supply line for open circuit.

Q. Is the check result normal?

STEP 5. M.U.T.-III diagnosis code

Q. Is the diagnosis code set?

STEP 6. M.U.T.-III CAN bus diagnostics

Q. Is the check result normal?

STEP 7. M.U.T.-III other systems diagnosis code

Q. Is the diagnosis code set?