2018 / ECLIPSE CROSS / EC - Workshop Manual
42 -BODY > 42B-KEYLESS OPERATION SYSTEM (KOS) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > B1133 IG1 output internal fail
Code No.B1133 IG1 setting circuit fail
| caution | When replacing the ECU, always check that the communication circuit is normal. |
DIAGNOSTIC FUNCTION
When a short circuit of IG1 setting circuit system is detected, KOS&OSS-ECU sets diagnosis code No.B1133. At the same time, KOS&OSS-ECU displays the power supply system error warning to the combination meter, and flashes the indicator of engine switch in amber.
JUDGEMENT CRITERIA
Check Conditions
- After KOS&OSS-ECU activation
Judgement Criterion
- IG1 setting circuit system is detected.
PROBABLE CAUSES
- Damaged wiring harness or connector (short to earth or short to power supply in IG1 line)
- Malfunction of ETACS-ECU
- Malfunction of KOS&OSS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check of short to power supply or short to earth circuit in IG1 line between KOS&OSS-ECU connector and ETACS-ECU connector
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
STEP 2. Voltage measurement at ETACS-ECU connector (IGS terminal)
(1) Measure the ETACS-ECU connector side by backprobing.
(2) Using the M.U.T.-IIISE, set the forced power supply output to other than "IG ON" (Refer to 
). (3) Measure the voltage between the ETACS-ECU connector (IGS terminal) and body earth.OK: 1 V or less
(4) Using the M.U.T.-IIISE, set the forced power supply output to" IG ON" (Refer to ). (5) Measure the voltage between the ETACS-ECU connector (IGS terminal) and body earth.OK: System voltage
Is the check result normal?
Go to Step 3. Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
STEP 3. Check whether the diagnosis code is set again.
