Code No.B1132 Starter circuit fail


caution When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA


Check Conditions
  • After OSS-ECU activation
Judgment Criterion
  • When the following conditions are met:

  1. When the starter setting signal is OFF, the cranking signal is received from engine-ECU.
  2. When the starter setting signal is OFF, the ignition start signal is received from ETACS-ECU.

PROBABLE CAUSES



  • Damaged wiring harness or connector (short to power supply in STO line or STOE line)
  • Engine starting circuit system error (NTSW line)
  • Malfunction of engine-ECU
  • ETACS-ECU malfunction
  • Malfunction of OSS-ECU
  • AS&G system error <at past trouble>

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III other system diagnosis code
Check the diagnosis code of engine-ECU.

Q. Is the diagnosis code U1004 set?
Check the diagnosis code of AS&G-ECU, and perform the troubleshooting. (Refer to GROUP 17 - Troubleshooting .) Then, go to Step 2.
Go to Step 2

STEP 2. M.U.T.-III other system data list
Check the engine-ECU data list.

  • Item No. 79: Cranking signal (Refer to GROUP 13A - Troubleshooting, Service Data Reference Table .)

Q. Is the check result normal?
Go to Step 3
Carry out the troubleshooting for the diagnosis code No.B1131. Refer to .

STEP 3. open circuit or short circuit in NTSW line between starter relay connector and engine-ECU connector

Q. Is the check result normal?
Go to Step 4
Repair the connector(s) or wiring harness.

STEP 4. M.U.T.-III other system data list
Check the ABS-ECU data list or ASC-ECU data list.

  • Item No. 87: Ignition switch (input value) (Refer to GROUP 35B - Troubleshooting <ABS> or GROUP 35C - Troubleshooting <ASC>.)

Q. Is the check result normal?
Go to Step 5
Replace the ETACS-ECU.

STEP 5. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?
YES (Set after 10 seconds or more have elapsed since the engine switch ON) : Replace the engine-ECU and register the chassis number and key codes [Refer to GROUP 00 - How to Perform Chassis Number (Chassis No.) Writing ].
YES (Set within 10 seconds since the engine switch ON) : Replace the OSS-ECU and register the chassis number (Refer to ).
NO : Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).