Toyota Corolla Cross: IG Circuit Short to Ground (B227111)
DESCRIPTION
This DTC is stored when a malfunction in the IG drive circuit or IG hold circuit of the certification ECU (smart key ECU assembly) or a malfunction in the IG output circuit between the output terminal of the certification ECU (smart key ECU assembly) and IG relay is detected.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Note |
|---|---|---|---|---|
| B227111 |
IG Circuit Short to Ground |
When either of the following conditions is met (1-trip detection logic*1):
|
| DTC Output Confirmation Operation:
|
- *1: Only detected while a malfunction is present and the ignition switch is ON.
- *2: The IG circuit and IG hold circuit activate the IG relay.
- *3: After the IG circuit turns on, even if the certification ECU (smart key ECU assembly) malfunctions, the IG hold circuit will maintain the power source mode in ON.
|
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
|---|---|
|
The ignition switch cannot be turned to ON (the hybrid control system cannot be started). |
The power source mode cannot be changed to ON. |
|
DTC No. | Data List and Active Test |
|---|---|
|
B227111 | Power Source Control
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.
Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
- The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
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- Before replacing the certification ECU (smart key ECU assembly), refer to Registration.
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- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. | CHECK HARNESS AND CONNECTOR (POWER SOURCE) |
| (a) Disconnect the I222 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 |
|---|---|---|
|
I222-6 (+B) - Body ground |
Ignition switch off | 11 to 14 V |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE |
|
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| 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 HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) AND BODY GROUND) |
(a) Disconnect the I223 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the 8B and 8C power distribution box assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-17 - I223-24 (IGPD) |
Always | Below 1 Ω |
|
8B-10 - I223-11 (IGRD) |
Always | Below 1 Ω |
|
8C-17 or I223-24 (IGPD) - Other terminals and body ground |
Always | 10 kΩ or higher |
|
8B-10 or I223-11 (IGRD) - Other terminals and body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. |
CHECK POWER DISTRIBUTION BOX ASSEMBLY |
(a) Disconnect the 8C power distribution box assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-17 - 8E-14 | Always |
Below 1 Ω |
|
8C-17 or 8E-14 - Other terminals |
Always | 10 kΩ or higher |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
|
| 5. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - IGP RELAY) |
(a) Remove the IGP-MAIN relay from the No. 1 engine room relay block and No. 1 junction block assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8E-14 - No. 1 engine room relay block and No. 1 junction block assembly IGP-MAIN relay terminal 1 |
Always | Below 1 Ω |
|
8E-14 or No. 1 engine room relay block and No. 1 junction block assembly IGP-MAIN relay terminal 1 - Other terminals and body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. |
INSPECT IGP RELAY |
| (a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | | REPLACE IGP RELAY |
|
| 7. |
CHECK POWER DISTRIBUTION BOX ASSEMBLY |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8B-10 - 8B-36 | Always |
20 Ω or higher |
|
8B-10 - 8C-41 | Always |
20 Ω or higher |
|
8B-10 or 8B-36 - Other terminals |
Always | 10 kΩ or higher |
|
8B-10 or 8C-41 - Other terminals |
Always | 10 kΩ or higher |
| OK | | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
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Precaution
PRECAUTION PRECAUTIONS WHEN USING GTS (a) When using the GTS with the ignition switch off to troubleshoot:
Connect the GTS to the vehicle, and turn a courtesy light switch on and off at 1.5 seconds intervals until communication between the GTS and vehicle begins.
(b) After all DTCs are cleared,
