DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit between terminal ACCD of the certification ECU (smart key ECU assembly) and the ACC relay.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
---|---|---|---|---|
B2274 |
ACC Monitor Malfunction |
The ACC relay circuit of the certification ECU (smart key ECU assembly) is malfunctioning. (1-trip detection logic*) HINT: When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning. |
|
|
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
---|---|
HINT: The engine switch can be turned on (IG) and the engine can be started. |
- |
DTC No. |
Data List and Active Test |
---|---|
B2274 |
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) |
Click here
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE |
|
2. |
CHECK HARNESS AND CONNECTOR (GROUND) |
Click here
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the 3A and 3D instrument panel junction block assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F1-16 (ACCD) - 3A-30 |
Always |
Below 1 Ω |
3D-3 - Body ground |
Always |
Below 1 Ω |
F1-16 (ACCD) or 3A-30 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3A-30 - 3D-3 |
20°C (68°F) |
285.71 to 428.57 Ω |
3K-1 - 3A-40 |
Battery voltage not applied between terminals 3A-30 and 3D-3 |
10 kΩ or higher |
Battery voltage not applied between terminals 3A-30 and 3D-3 |
Below 1 Ω |
NG | ![]() |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
5. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Reconnect the F1 certification ECU (smart key ECU assembly) connector. |
|
(b) Install the instrument panel junction block assembly.
Click here
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F1-16 (ACCD) - Body ground |
Engine switch off → Engine switch on (ACC) |
1 V or less → 8.5 V or higher |
OK | ![]() |
END (TEMPORARY CONNECTION FAILURE IS SUSPECTED)
|
NG | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Toyota CH-R Service Manual > Front Door Speaker: Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE FRONT DOOR INSIDE HANDLE BEZEL PLUG
Click here
2. REMOVE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT ARMREST ...
Toyota CH-R Service Manual > Pre-collision System: Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U023A)
DESCRIPTION
These DTCs are stored when a communication malfunction occurs between ECUs that
perform pre-collision control.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
U0100
Lost Communication with ECM / PCM & ...