MONITOR DESCRIPTION
The ECM continuously monitors its main and sub CPUs while cruise control is operating. This self-check ensures that the ECM is functioning properly. If outputs from the 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 |
---|---|---|
P1607 |
An ECM internal error (1 trip detection logic) |
ECM |
MONITOR STRATEGY
Related DTC |
P1607: Internal Control Module Performance |
Required sensors/Components (Main) |
ECM |
Required sensors/Components (Related) |
Cruise control |
Frequency of Operation |
Continuous |
Duration |
0.3 seconds |
MIL Operation |
Immediate |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored |
None |
Both of the following conditions are met |
- |
Cruise control |
Forbiddance |
DMA communication error |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met |
- |
Cruise control |
Operating |
Low speed control |
Operating |
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 P1607) |
(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 P1607 is output |
B |
A | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
B | ![]() |
REPLACE ECM |
Inspection
INSPECTION
PROCEDURE
1. INSPECT TIE ROD ASSEMBLY LH
(a) Secure the tie rod assembly LH in a vise.
(b) Install the nut to the stud bolt.
(c) Flip the ball joint back and forth 5 times.
(d) Set a to ...
Precaution
PRECAUTION
1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following system(s) after the cable is reconnected.
System Name
...
Vehicle Speed Signal Malfunction (C1541)
DESCRIPTION
The power steering ECU receives vehicle speed signals from the brake actuator
assembly (skid control ECU) via CAN communication. The ECU provides appropriate
assisting force in accordance with the vehicle speed, based on the signals.
...