MONITOR DESCRIPTION
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the ignition switch is turned off. If the output voltage is higher than 7 V when the ignition switch is turned off, the ECM illuminates the MIL and stores the DTC when the ignition switch is turned to ON.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P0657 |
A throttle actuator power supply error (1 trip detection logic) |
ECM |
MONITOR STRATEGY
Related DTCs |
P0657: Electronic Throttle Actuator Supply Voltage Circuit Performance |
Required Sensors/Components (Main) |
ECM |
Required Sensors/Components (Related) |
Throttle actuator |
Frequency of Operation |
Once per driving cycle |
Duration |
- |
MIL Operation |
Immediate |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs not stored |
None |
Both of the following conditions are met |
- |
Electronic throttle actuator power supply voltage |
7 V or higher |
Ignition switch |
ON to off |
TYPICAL MALFUNCTION THRESHOLDS
Both of the following conditions are met |
- |
Last trip condition |
Met |
Command to electronic throttle actuator power |
ON |
CONFIRMATION DRIVING PATTERN
HINT:
Techstream Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
HINT:
CAUTION / NOTICE / HINT
HINT:
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. |
READ OUTPUT DTC (DTC P0657) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTC (See page ).
(e) Turn the ignition switch off.
(f) Turn the Techstream off.
(g) Disconnect the Techstream.
(h) Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
(i) Connect the cable to the negative (-) battery terminal.
(j) Turn the ignition switch to ON.
(k) Wait 10 seconds or more.
(l) Turn the ignition switch off.
(m) Wait 15 seconds or more.
(n) Connect the Techstream to the DLC3.
(o) Turn the ignition switch to ON.
(p) Turn the Techstream on.
(q) Wait 5 seconds or more.
(r) Enter the following menus: Powertrain / Engine / Trouble Codes.
(s) Read the DTCs.
Result
Result |
Proceed to |
---|---|
DTC is not output |
A |
DTC P0657 is output |
B |
A | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
B | ![]() |
REPLACE ECM |
Brake Signal Malfunction (B2284)
DESCRIPTION
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 ECM via CAN. If the information from these 2 sources is incons ...
Removal
REMOVAL
PROCEDURE
1. REMOVE AIR CONDITIONING UNIT ASSEMBLY
(See page )
2. REMOVE NO. 1 FINISH PANEL MOUNTING BRACKET
3. REMOVE NO. 2 FINISH PANEL MOUNTING BRACKET
4. REMOVE NO. 3 AIR DUCT SUB-ASSEMBLY
5. REMOVE NO. 2 AIR DUCT SUB-ASSEMBLY
...
Yaw Rate Sensor Output Malfunction (C1448/98)
DESCRIPTION
The skid control ECU receives signals from the yaw rate and acceleration sensor
via the CAN communication system.
The yaw rate sensor has a built-in acceleration sensor and detects the vehicle
condition.
DTC Code
DTC De ...