DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK WHETHER DTC OUTPUT RECURS
INSPECT FUSE (AM2)
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)
DTC B2271 Ignition Hold Monitor Malfunction
DESCRIPTION
This DTC is stored when the IG output circuits inside the main body ECU are open or shorted.
| DTC Code | Detection Condition | Trouble Area |
| B2271 | The IG1 No. 3 relay actuation circuit or integration relay (IG2 relay) actuation circuit inside the main body ECU is abnormal. | |
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK WHETHER DTC OUTPUT RECURS |
Check whether DTC B2271 is output.
Result| Result | Proceed to |
| DTC B2271 output | A |
| No DTC output | B |
| | USE SIMULATION METHOD TO CHECK ()
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Remove the AM2 fuse from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| AM2 fuse | Always | Below 1 Ω |
| 3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) |
Disconnect the E1, E2 and 2D main body ECU connectors.
Measure the voltage and resistance according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E1-6 (AM1) - Body ground | Always | 11 to 14 V |
| E2-1 (AM2) - Body ground | Always | 11 to 14 V |
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| 2D-62 (GND2) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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