DESCRIPTION
This DTC is stored when a malfunction in the IG circuit or IG hold circuit of the certification ECU (smart key ECU assembly) is detected.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
---|---|---|---|---|
B2271 | Ignition Hold Monitor Malfunction | When either of the following conditions is met (1-trip detection logic*1):
|
|
|
Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
---|---|
The engine switch cannot be turned on (IG) (the engine cannot be started). | The power source mode cannot be changed to on (IG). |
DTC No. | Data List and Active Test |
---|---|
B2271 | Power Source Control
Starting Control
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (POWER SOURCE) |
(a) Disconnect the J41 certification ECU (smart key ECU assembly) connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J41-4 (+B) - Body ground | Always | 11 to 14 V |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE |
|
2. | CHECK HARNESS AND CONNECTOR (GROUND) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Reconnect the J41 certification ECU (smart key ECU assembly) connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J41-17 (IG1D) - Body ground | Engine switch on (ACC) → Engine switch on (IG) | 1 V or less → 9 V or higher |
OK | ![]() | END (TEMPORARY CONNECTION FAILURE IS SUSPECTED) |
NG | ![]() | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
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