DESCRIPTION
The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. Therefore, if the skid control ECU (brake actuator assembly) detects a communication error with the ECM, it sends a malfunction signal back to the ECM.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
P1631 |
Communication Error from ECM to VSC |
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a logical error signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
w/o Smart Key System: Click here
w/ Smart Key System: Click here
Click here
PROCEDURE
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
Click here
Result |
Proceed to |
---|---|
CAN communication system DTCs are not output |
OK |
CAN communication system DTCs are output |
NG |
NG |
GO TO CAN COMMUNICATION SYSTEM |
|
2. |
CHECK FOR DTCs (RADAR CRUISE1) |
(a) Clear the DTCs.
Click here
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC P1631 is not output |
A |
DTC P1631 is output |
B |
A |
USE SIMULATION METHOD TO CHECK |
|
3. |
REPLACE ECM |
(a) Replace the ECM.
Click here
|
4. |
CHECK FOR DTCs (RADAR CRUISE1) |
(a) Clear the DTCs.
Click here
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC P1631 is not output |
A |
DTC P1631 is output |
B |
A |
END |
B |
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL SHIFT SOLENOID VALVE SLT
(a) Install the shift solenoid valve SLT and straight pin to the transmission
valve body assembly.
2. INSTALL SHIFT SOLENOID VALVE SL2
(a) Install the shift solenoid valv ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE HOOD BULGE ASSEMBLY (w/ Hood Bulge)
(a) Remove the 4 nuts.
(b) Disengage the clip from back side of the hood panel to remove the hood bulge
assembly together with the air intake guide.
2. REMOVE NO. 2 HOOD BU ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT PROPELLER SHAFT WITH CENTER BEARING ASSEMBLY
(a) Using a dial indicator, check the propeller shaft runout.
Maximum runout:
0.6 mm (0.0236 in.)
If the shaft runout is greater than the maximum, replace the shaft.
2. INSPECT PROPELLER SHAFT
(a) Using a dial ...