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DTC B1132 Starter circuit fail
 
 
cautionWhen replacing the ECU, always check that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
When the engine starting circuit system "ON" status is received while the starter setting circuit system is "OFF", the starter setting circuit system determines that the system is defective, and the KOS&OSS-ECU sets DTC B1132. At the same time, KOS&OSS-ECU displays the power supply system error warning to the combination meter.
 
 
JUDGMENT CRITERIA
Check Conditions
  • After KOS&OSS-ECU activation
Judgment Criterion
  • When the starter setting signal is "OFF", the cranking signal is received from ECM.
 
 
PROBABLE CAUSES
  • Damaged wiring harness or connector (short to power supply in ST line)
  • Malfunction of ECM
  • Malfunction of KOS&OSS-ECU
  • Malfunction of ETACS-ECU
 
 
DIAGNOSIS
STEP 1. Check of short to power supply, short to ground or open circuit in STO 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. Check of short to power supply, short to ground or open circuit in ST line between ETACS-ECU connector and ECM connector
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check the other system data list
Check the ECM data list.
  • Item No. 79: Cranking signal (Refer to GROUP 13A - Diagnosis - Data List Reference Table ).
Is the check result normal?
Go to Step 4.
Carry out the troubleshooting for DTC B1131 (Refer to ).
 
STEP 4. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.
(1) Turn the power supply mode of the engine switch from "OFF" to "ON."
(2) On completion, check that the DTC is not set, after 10 seconds or more have elapsed since the engine switch "ON."
Is the DTC set?
Replace the ECM and register the chassis number and key codes [Refer to GROUP 00 - How to Perform VIN Writing ], and go to Step 6.
: Go to Step 5.
 
STEP 5. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.
(1) Turn the power supply mode of the engine switch from "OFF" to "ON."
(2) On completion, check that the DTC is not set, after 10 seconds or more have elapsed since the engine switch "START."
Is the DTC set?
Replace the ECM and register the chassis number and key codes [Refer to GROUP 00 - How to Perform VIN Writing ], and go to Step 6.
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 6. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.
(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from "OFF" to "ON."
(3) On completion, check that the DTC is not set again.
Is the DTC set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).