MONITOR DESCRIPTION
The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. It is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standard, the ECM illuminates the MIL and stores the DTC immediately.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P0604 |
ECM RAM error (1 trip detection logic) |
ECM |
MONITOR STRATEGY
Related DTCs |
P0604: ECM RAM Error |
Required Sensors/Components (Main) |
ECM |
Required Sensors/Components (Related) |
None |
Frequency of Operation |
Continuous |
Duration |
6 times |
MIL Operation |
Immediate |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored |
None |
TYPICAL MALFUNCTION THRESHOLDS
RAM mirror check |
Fail |
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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 P0604) |
(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 and turn the Techstream off.
(f) Disconnect the Techstream.
(g) Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
(h) Connect the cable to the negative (-) battery terminal.
(i) Connect the Techstream to the DLC3.
(j) Turn the ignition switch to ON.
(k) Turn the Techstream on.
(l) Wait 16 seconds or more.
(m) Enter the following menus: Powertrain / Engine / Trouble Codes.
(n) Read the DTCs.
Result |
Proceed to |
---|---|
DTC is not output |
A |
DTC P0604 is output |
B |
A | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
B | ![]() |
REPLACE ECM |
Lost Communication with Automatic High Beam Sensor (B2432)
DESCRIPTION
Refer to DTC B2432 (Lighting system) (See page
).
DTC No.
DTC Detection Condition
Trouble Area
B2432
Malfunction in LIN communication system
Inner rear view mirr ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful bec ...
Rear Right Center Sensor Malfunction (C1AE8)
DESCRIPTION
The No. 1 ultrasonic sensor (rear right center sensor) is installed on the rear
bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic
sensor (rear right center sensor). If the No. 1 ultrasonic sensor (rear right ...