DESCRIPTION
When the engine 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.)
WIRING DIAGRAM
Refer to DTC B2274 (See page ).
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) |
See page
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) |
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2. |
CHECK HARNESS AND CONNECTOR |
See page
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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3. |
INSPECT ACC RELAY |
See page
NG | ![]() |
REPLACE ACC RELAY |
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4. |
CHECK HARNESS AND CONNECTOR |
See page
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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5. |
CHECK HARNESS AND CONNECTOR |
See page
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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6. |
CHECK POWER MANAGEMENT CONTROL ECU |
(a) Reconnect the all connectors. |
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D43-19 (ACCD) - Body ground |
Engine switch off |
Below 1 V |
D43-19 (ACCD) - Body ground |
Engine switch on (IG) |
Output voltage at terminal AM21 or AM22 -2 V or more |
*1 |
Components with harness connected (Power Management Control ECU) |
OK | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
NG | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
Lost Communication with A/C ECU (U0164)
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
U0164
No communication from the air conditioning amplifier continues.
Air conditioning amplifier branch wire or connect ...
Short in Front Pretensioner Squib LH Circuit (B1905/74-B1908/74)
DESCRIPTION
The front pretensioner squib LH circuit consists of the center airbag sensor
assembly and front seat outer belt assembly LH.
The center airbag sensor assembly uses this circuit to deploy the seat belt pretensioner
when deployment conditions a ...
Terminals Of Ecu
TERMINALS OF ECU
1. REAR TELEVISION CAMERA ASSEMBLY
(a) Disconnect the R21 rear television camera assembly connector.
(b) Measure the voltage on the wire harness side connector according to the value(s)
in the table below.
Terminal No. (Symb ...