Scheme 72
![Scheme 72: ON-VEHICLE INSPECTION [08/2012 - ]](https://i.diagnostdata.com/repair/aa/aaf05130f34b67d0e2b6fce9eb6f17fdb082e44ad3a4f10e2e69f62dbb81badc.webp)
- CHECK POWER SOURCE MODE CHANGE FUNCTION Check the function of the engine switch. Check that power source mode changes in accordance with the conditions of the shift position and brake pedal. Brake Pedal Shift Lever Power Source Mode Pattern Depressed P or N Position When the engine switch is pushed once. off --> engine start Not depressed P position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> off Except P Position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> on (ACC) - P Position When the engine switch is pushed in the on (IG) condition (engine running). on (IG) --> off - Except P Position When the engine switch is pushed in the on (IG) condition (engine running). on (IG) --> on (ACC) Check if power source mode changes without pressing the engine switch. With power source mode on (ACC) and the shift position in P, wait for at least 1 hour. Check that power source mode changes from on (ACC) to off automatically.
- CHECK INDICATOR CONDITION Check the indicator on the engine switch. Check that the engine switch indicator turns on and changes color according to the table below. Power Source Mode/Condition Indicator Light Condition Brake pedal released Brake pedal depressed, shift lever in P or N off OFF Turns ON (Green) on (ACC, IG) Turns ON (Amber) Turns ON (Green) Engine running OFF OFF Steering lock not unlocked Flashes (Green) for 30 sec. Flashes (Green) for 30 sec. System malfunction Flashes (Amber) for 15 sec. Flashes (Amber) for 15 sec.
DESCRIPTION
This DTC is output when a problem such as an open in the AM2 fuse, an open or short in the wire harness between the fuse and power source control ECU, a short in the IG output circuit inside the power source control ECU, a short between the power source control ECU and relay, and a short in the relay is detected.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2271 | Hold circuit, IG1 relay actuation circuit or IG2 relay actuation circuit inside power source control ECU is open or short | AM2 fuse IG2 relay Cowl side J/B RH Cowl side J/B LH Power source control ECU Wire harness or connector |
Scheme 73
This DTC is output when there is a problem in the IG1 output circuit, which is from the inside of the power source control ECU to the RH-IG or LH-IG relay.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2272 | IG1 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning | AM2 fuse Cowl side J/B RH Cowl side J/B LH Power source control ECU Wire harness or connector |
Scheme 74
This DTC is output when there is a problem in the IG2 output circuit, which is from the inside of the power source control ECU to the IG2 relay.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2273 | IG2 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning | AM2 fuse IG2 relay Power source control ECU Wire harness or connector |
Scheme 75
This DTC is output when there is a problem in the ACC output circuit, which is from the inside of the power source control ECU to the ACC or PWR POINT relay.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2274 | ACC relay actuation circuit inside power source control ECU or other related circuit is malfunctioning | AM2 fuse Cowl side J/B RH Power source control ECU Wire harness or connector |
Scheme 76
This DTC is output when there is an open, short, or any other problem in the engine start request output circuit inside the power source control ECU or in the external circuit.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2275 | ST output circuit (engine starting request signal circuit) inside power source control ECU or other related circuit is malfunctioning | AM2 fuse ECM Steering lock ECU Power source control ECU Wire harness or connector |
Scheme 77
This DTC is output when the ACCR output circuits inside the power source control ECU are open or short.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2276 | ACCR output circuit inside power source control ECU or other related circuit is malfunctioning | Power source control ECU ECM Wire harness or connector |
Scheme 78
This DTC is output when the submersion circuit monitor inside the power source control ECU detects that the vehicle is submerged in water.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2277 | Submersion circuit monitor inside power source control ECU detects that vehicle is submerged in water | Power source control ECU |
This DTC is output when 1) a malfunction is detected between the power source control ECU and the engine switch; or 2) either of the switches inside the engine switch is malfunctioning.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2278 | Communication is abnormal between the power source control ECU and engine switch or the engine switch is defective | Engine switch Power source control ECU Wire harness or connector |
Scheme 79
The power source control ECU and the shift lock control ECU are connected by a cable and the BEAN. If the cable information and BEAN information are inconsistent, this DTC will be output.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2281 | Cable and BEAN between the power source control ECU and the shift lock control ECU are inconsistent | Power source control ECU Shift lock control ECU ECM Wire harness or connector |
Scheme 80
The power source control ECU and the combination meter are connected by a cable and the BEAN. DTC B2282 is output when: 1) the cable information and BEAN information are inconsistent; and 2) a malfunction is detected between the vehicle speed sensor and combination meter.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2282 | When both conditions below are met: Cable for BEAN information between the power source control ECU and the combination meter are inconsistent Malfunction is detected between the vehicle speed sensor and the combination meter | Multiplex communication system Combination meter system Power source control ECU Wire harness or connector |
Scheme 81
Scheme 82
HINT
- A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
- If a short occurs in an ECU, all systems in the diagram below will not operate normally.
The skid control ECU converts these signals into 4-pulse signals and sends them to the combination meter. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the power source control ECU. The power source control ECU determines the vehicle speed based on the frequency of these pulse signals.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2283 | When both conditions below are met: Over-deceleration in vehicle speed Vehicle speed and engine speed do not match | DTC B2282 detection area Combination meter Speed sensor Skid control ECU Wire harness or connector |
This DTC is output when: 1) the brake signal circuit between the power source control ECU and the stop light switch is malfunctioning; and 2) the BEAN information is inconsistent.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2284 | Communication or communication line is abnormal between the power source control ECU and the stop light switch | Stop light switch Multiplex communication system CAN communication system ECM Power source control ECU Wire harness or connector |
Scheme 83
This DTC is output when serial communication signals and LIN communication signals in the circuit between the power source control ECU and steering lock actuator (steering lock ECU) are inconsistent.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2285 | Cable and LIN information between the power source control ECU and the steering lock ECU are inconsistent | Power source control ECU Steering lock ECU Wire harness or connector |
Scheme 84
This DTC is output when serial communication signals and multiplex communication signals in the circuit between the power source control ECU and ECM are inconsistent.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2286 | Serial communication signals and multiplex communication signals in the circuit between the power source control ECU and engine control ECU are inconsistent. | Multiplex communication system CAN communication system ECM Power source control ECU Wire harness or connector |
Scheme 85
This DTC is output when there is a LIN communication problem between the power source control ECU and smart key ECU (certification ECU).
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2287 | Communication or communication line is abnormal between the power source control ECU and the certification ECU | Power source control ECU Certification ECU Wire harness or connector |
Scheme 86
Scheme 87
This DTC is output when the power source control ECU cannot detect the unlock condition of the steering lock within a specified time.
HINT
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2288 | After turning engine switch from off to on (IG), the steering wheel does not unlock for a certain period of time (ECU unlocks steering wheel only when it receives an unlock signal from LIN communication and cable) | Power source control ECU Steering lock ECU Wire harness or connector |
Scheme 88
This DTC is output when there is a LIN communication problem between the power source control ECU and certification ECU or when there is a problem in the engine immobiliser system.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2289 | Either condition below is met: Cable and BEAN are abnormal between the power source control ECU and the engine immobiliser system The engine immobiliser system is malfunctioning | Power source control ECU Engine immobiliser system Wire harness or connector Certification ECU |
Scheme 89
Engine start conditions or system malfunctions can be checked by the status of the engine switch indicator light.
| Power Source Mode/Condition | Indicator Light Condition | |
|---|---|---|
| Brake pedal released | Brake pedal depressed, shift lever in P or N | |
| Off | OFF | Illuminates ON (Green) |
| On (ACC, IG) | Illuminates ON (Amber) | Illuminates ON (Green) |
| Engine running | OFF | OFF |
| Steering lock not unlocked | Flashes (Green) for 30 sec. | Flashes (Green) for 30 sec. |
| System malfunction | Flashes (Amber) for 15 sec. | Flashes (Amber) for 15 sec. |
ENGINE SWITCH INDICATOR LIGHT CONDITION
Scheme 90
When the engine switch is pushed with the electrical key in the cabin, the power source control ECU receives signals to switch the power source mode.
HINT
To allow use of Techstream to inspect the smart access system with push-button start when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the power source control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
Scheme 91
Scheme 92
When the engine switch is pushed with the electrical key in the cabin, the power source control ECU receives signals to switch the power source mode.
HINT
To allow use of Techstream to inspect the smart access system with push-button start when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the power source control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
Scheme 93
Scheme 94
When the engine switch is pushed with the electrical key in the cabin, the power source control ECU receives signals to switch the power source mode.
HINT
To allow use of Techstream to inspect the smart access system with push-button start when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the power source control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
See also:
• INSPECTION [08/2012 - ]