Last Modified: 11-29-2007 1.6 C
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: Sequoia Doc ID: RM000000ZK1011X
Title: CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

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.

DTC No.

DTC Detection Condition

Trouble Area

P1615

While the dynamic laser cruise control is either preparing for operation or operating, if communication data from the distance control ECU is logically inconsistent for 0.5 seconds, the ECM records this logical error code
  • Communication circuit
  • Distance control ECU
  • 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.

NOTICE:

When the distance control ECU and ECM is replaced with a new one, initialization must be performed CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: INITIALIZATION (2008 Sequoia) .

PROCEDURE

1.

REPLACE DISTANCE CONTROL ECU

Replace the distance control ECU CRUISE CONTROL: DISTANCE CONTROL ECU: REMOVAL (2008 Sequoia) .

NEXT

2.

PERFORM INITIALIZATION

(a) Perform initialization CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: INITIALIZATION (2008 Sequoia) .

(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) CRUISE CONTROL: LASER SENSOR: ADJUSTMENT (2008 Sequoia) .
  • If initialization cannot be performed, first inspect the stop light switch circuit, cruise main switch circuit, and skid control buzzer circuit.

NEXT

3.

CLEAR DTC

(a) Clear the DTC CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

NEXT

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 CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

Result

Result

Proceed to

DTC is not output

A

DTC is output (for 2UZ-FE)

B

DTC is output (for 3UR-FE)

C
A