Scheme 23
- CHECK POWER SOURCE MODE CHANGE FUNCTION Check the function of the power switch. Check that the power source mode changes in accordance with the conditions of the shift state and brake pedal. Brake Pedal Shift State Power Source Mode Pattern Depressed P When the power switch is pushed once. off --> on (READY) Not depressed P Each time the power switch is pushed. off --> on (ACC) --> on (IG) --> off Except P Each time the power switch is pushed. on (ACC) --> on (IG) --> off - P When the power switch is pushed in the on (READY) condition. on (READY) --> off - Except P When the power switch is pushed in the on (READY) condition. on (READY) --> off
- CHECK INDICATOR CONDITION Check the indicator light on the power switch. Check that the power 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, Park (P) selected off off Turns on (Green) on (ACC, IG) Turns on (Amber) Turns on (Green) on (READY) off off System malfunction Flashes (Amber) for 15 sec. Flashes (Amber) for 15 sec.
DESCRIPTION
This DTC is stored when a problem such as an open in the AM2 fuse, an open or short in the wire harness between the fuse and power management control ECU, a short in the IG output circuit inside the power management control ECU, a short between the power management control ECU and relay, or a short in the relay is detected.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2271 | The hold circuit, IG1 relay actuation circuit or IG2 relay actuation circuit inside the power management control ECU is open or shorted. | AM2 fuse IG1 relays NO. 1 integration relay (IG2 relay) Power management control ECU Instrument panel junction block assembly Wire harness or connector |
Scheme 24
This DTC is stored when there is a problem in the ACC output circuit. The ACC circuit is the circuit that goes from inside the power management control ECU to the ACC relay.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2274 | The ACC relay actuation circuit inside the power management control ECU or other related circuit is malfunctioning. | AM2 fuse Power management control ECU Instrument panel junction block assembly (ACC relay, P/POINT relay) Wire harness or connector |
Scheme 25
This DTC is stored when a malfunction is detected in the starter circuit inside the power management control ECU.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2275 | Power management control ECU internal HV activation request output circuit malfunction or external circuit malfunction. | AM2 fuse Hybrid vehicle control ECU Power management control ECU Wire harness or connector |
Scheme 26
This DTC is stored when the submersion circuit monitor inside the power management control ECU detects a large amount of water.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2277 | The submersion circuit monitor inside the power management control ECU detects a large amount of water. | Power management control ECU |
The power management control ECU receives vehicle speed information using 2 methods. It receives a speed signal from the combination meter assembly via a direct line, and a speed signal from the skid control ECU via CAN. If the information sent using these 2 methods is inconsistent, this DTC will be stored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2282 | Speed information received by the power management control ECU via direct line and via CAN is inconsistent. | CAN communication system Combination meter assembly Power management control ECU Junction connector Wire harness or connector |
Scheme 27
HINT
- A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
- If a short occurs in an ECU, all systems in the diagram above will not operate normally.
The power management control ECU receives brake signal information from 2 sources. It receives a signal from the stop light switch assembly via a direct line, and a signal from the skid control ECU assembly via CAN. If the information from these 2 sources is inconsistent, this DTC will be stored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2284 | Stop light switch assembly operation information received by the power management control ECU from the stop light switch assembly via a direct line and stop light switch assembly information from the skid control ECU assembly via CAN are inconsistent. | AM2 fuse STOP fuse Stop light switch assembly CAN communication system Skid control ECU assembly Power management control ECU Wire harness or connector |
Scheme 28
This DTC is stored when a malfunction is detected in the READY signal circuit inside the power management control ECU.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2286 | READY signal error inside the power management control ECU. | AM2 fuse Hybrid vehicle control ECU Power management control ECU Wire harness or connector |
Scheme 29
When the power switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.
HINT
To allow use of the Techstream to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and the power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
Scheme 30
When the power switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.
HINT
To allow use of the Techstream to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
When the power switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.
HINT
To allow use of the Techstream to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
When the electronic key is in the cabin and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode. In addition, when the power switch is pressed with park (P) selected and the brake pedal depressed, the hybrid system turns on (READY).
Scheme 31
Scheme 32
See also:
• REMOVAL - Step 3
• REMOVAL