Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

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 (See INITIALIZATION ).

REPLACE DISTANCE CONTROL ECU
Replace the distance control ECU (See REMOVAL ).
PERFORM INITIALIZATION
1. Perform initialization (See INITIALIZATION ).
  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.
    NOTE:
    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 - See ADJUSTMENT ).
    
    If initialization cannot be performed, first inspect the stop light switch circuit, cruise main switch circuit, and skid control buzzer circuit.
CLEAR DTC
1. Clear the DTC (See FAIL-SAFE CHART ).

CHECK FOR DTC

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.
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.

Check for DTCs (See FAIL-SAFE CHART ).

Result

DTC RESULT REFERENCE

Result	Proceed to
DTC is not output	A
DTC is output (for 2UZ-FE)	B
DTC is output (for 3UR-FE)	C

B: REPLACE ECM (See REMOVAL )

C: REPLACE ECM (See REMOVAL )

A: END (DISTANCE CONTROL ECU DEFECTIVE)