P1615

CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: P1615: Communication Error from Distance Control ECU to ECM

DTC P1615 - Communication Error from Distance Control ECU to ECM

DESCRIPTION

The distance control ECU receives information about the area in front of the vehicle from the laser radar sensor and then sends a brake control demand signal (deceleration demand) and diagnosis signals, such as laser radar sensor grime signals or laser radar sensor malfunction signals, to the ECM.





INSPECTION PROCEDURE

HINT: This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

NOTE: When the distance control ECU and ECM is replaced with a new one, initialization must be performed Programming and Relearning.

PROCEDURE

1. REPLACE DISTANCE CONTROL ECU
Replace the distance control ECU Removal.
NEXT -- Continue to next step.

2. PERFORM INITIALIZATION
(a) Perform initialization Programming and Relearning.
(1) Turn the ignition switch to ON.
(2) Turn the cruise control main switch on.
(3) With the brake pedal depressed, push the cruise control main switch to + (ACCEL)/RES (RESUME) 3 times within 3 seconds. Check that the skid control buzzer sounds at this time.

NOTICE:
- Do not turn the light control switch on at this time because the beam axis automatic adjustment mode has already started, which could lead to incorrect beam axis. If the light control switch is turned on by mistake, readjust the beam axis (refer to Beam Axis Adjustment) Adjustments.
- If initialization cannot be performed, first inspect the stop light switch circuit, cruise main switch circuit, and skid control buzzer circuit.

NEXT -- Continue to next step.

3. CLEAR DTC
(a) Clear the DTC Dynamic Laser Cruise Control System.
NEXT -- Continue to next step.

4. CHECK FOR DTC
(a) Reproduce the DTC detection conditions under which the DTC is stored.

HINT: If the DTC detection conditions are not correct, the system will not detect the trouble.

(b) Drive the vehicle at a speed of 45 km/h (28 mph) or more and turn the cruise control main switch ON. Push the -SET switch to activate the cruise control system.
(c) Check for DTCs Dynamic Laser Cruise Control System.

Result





D -- REPLACE ECM
C -- REPLACE ECM
B -- REPLACE ECM
A -- END (DISTANCE CONTROL ECU DEFECTIVE)