[Previous][Next]
DTC B1130: Ignition power supply
 
 
caution
  • If DTC B1130 is set, always diagnose the CAN bus lines.
  • Before replacing ECU, ensure that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
If the output power supply status is different from the electric motor switch status information received from ETACS-ECU via CAN, OSS-ECU sets the DTC B1130. At the same time, OSS-ECU displays the power supply system error warning screen to the multi information display of the combination meter, and flashes the indicator of electric motor switch in amber.
 
 
DTC SET CONDITION
Check Conditions
  • The terminal voltage of +B1 and +B2 is between 10 and 16 V.
Judgment Criterion
  • Any of the following conditions is met, and 2 seconds or more have elapsed.
    1. The electric motor switch status information received from ETACS-ECU is other than OFF when the power supply mode of OSS is OFF.
    2. The electric motor switch status information received from ETACS-ECU is other than ACC when the power supply mode of OSS is ACC.
    3. The electric motor switch status information received from ETACS-ECU is other than ON when the power supply mode of OSS is ON.
    4. The electric motor switch status information received from ETACS-ECU is other than START when the power supply mode of OSS is START.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus line
  • Damaged wiring harness or connector (short to ground, short to power supply, or open circuit in ACC line, IG1 line, or STO line)
  • Malfunction of OSS-ECU
  • ETACS-ECU malfunction
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect scan tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to ON.
(3) Diagnose the CAN bus line.
(4) Turn the power supply mode of the electric motor switch to OFF.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the diagnostic trouble code.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect scan tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to ON.
(3) Check if OSS-ECU DTC B1131 or B1133 is set.
(4) Turn the power supply mode of the electric motor switch to OFF.
Is the DTC set?
Refer to diagnostic trouble code chart .
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to OFF.
(3) Operate the electric motor switch to change the power supply mode, and check that the data list display of ETACS-ECU is changed.
 
WHEN POWER SUPPLY MODE IS ACC (ELECTRIC MOTOR SWITCH INDICATOR IS ILLUMINATED IN AMBER)
ETACS-ECU data list
Item No.Check itemDisplay
288ACC switchON
 
WHEN POWER SUPPLY MODE IS ON (ELECTRIC MOTOR SWITCH INDICATOR IS ILLUMINATED IN BLUE)
ETACS-ECU data list
Item No.Check itemDisplay
254IG voltageSystem voltage
 
WHEN POWER SUPPLY MODE IS ELECTRIC MOTOR UNIT START)
ETACS-ECU data list
Item No.Check itemDisplay
287Starter switchON
Is the check result normal?
: Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
: Go to Step 4.
: Go to Step 5.
: Go to Step 6.
 
STEP 4. Check of short to power supply, short to ground and open circuit in ACC line between OSS-ECU connector and ETACS-ECU connector
noteBefore the wiring harness check, check the joint connector, and repair if necessary.
Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.
 
STEP 5. Check of short to power supply, short to ground and open circuit in IG1 line between OSS-ECU connector and ETACS-ECU connector
noteBefore the wiring harness check, check the joint connector, and repair if necessary.
Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.
 
STEP 6. Check of short to power supply, short to ground and open circuit in STO line between OSS-ECU connector and ETACS-ECU connector
Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.
 
STEP 7. Using scan tool (M.U.T.-IIISE), check data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to OFF.
(3) Check the OSS-ECU data list. (Check only where a problem is present.)
  • Using the scan tool (M.U.T.-IIISE), perform the forced power supply output.
 
State of forced power supply outputItem No.Check itemDisplay
IG-ON15IG1 output (monitor)ON
OFF
IG-ST13Cranking/ST SIG.output (monitor)ON
OFF
OK: Depending on the state of forced power supply output, the display is turned ON/OFF.
Is the check result normal?
Go to Step 8.
Replace the OSS-ECU and register the chassis number (Refer to ).
 
STEP 8. Using scan tool (M.U.T.-IIISE), check data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the power supply mode of the electric motor switch to the OFF before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Turn the power supply mode of the electric motor switch to OFF.
(3) Operate the electric motor switch to change the power supply mode, and check that the data list display of ETACS-ECU is changed. (Check only where a problem is present.)
 
WHEN POWER SUPPLY MODE IS ACC (ELECTRIC MOTOR SWITCH INDICATOR IS ILLUMINATED IN AMBER)
ETACS-ECU data list
Item No.Check itemDisplay
288ACC switchON
 
WHEN POWER SUPPLY MODE IS ON (ELECTRIC MOTOR SWITCH INDICATOR IS ILLUMINATED IN BLUE)
ETACS-ECU data list
Item No.Check itemDisplay
254IG voltageSystem voltage
 
WHEN POWER SUPPLY MODE IS ELECTRIC MOTOR UNIT START)
ETACS-ECU data list
Item No.Check itemDisplay
287Starter switchON
Is the check result normal?
: Go to Step 9.
: Replace the ETACS-ECU (Refer to GROUP 54A, ETACS - ETACS-ECU ).
 
STEP 9. Recheck for diagnostic trouble code.
Check again if the DTC is set in the OSS-ECU.
(1) Erase the DTC.
(2) Turn the electric motor switch from OFF to ON.
(3) On completion, check that the DTC is not set again.
Is the diagnostic trouble code set?
Replace the OSS-ECU and register the VIN (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).