Last Modified: 11-29-2007 1.6 C
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: Sequoia Doc ID: RM000000ZK3010X
Title: CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

P1617

Distance Control ECU Malfunction

DESCRIPTION

In the dynamic laser cruise control system, the ECM and the distance control ECU communicate with one another to control the system based on certain designation information. If the designation information of the ECM and distance control ECU are different or the distance control ECU is malfunctioning, this DTC is recorded.

DTC No.

DTC Detection Condition

Trouble Area

P1617

While the dynamic laser cruise control is either preparing for operation or operating, if a designation signal from the ECM and a designation return signal from the distance control ECU do not match or the distance control ECU is malfunctioning for 0.3 seconds, the ECM records this trouble code

Distance control ECU

INSPECTION PROCEDURE

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.

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.

OK:

The skid control buzzer sounds. (Initialization is performed.)

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.

OK

2.

CLEAR DTC

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

NEXT

3.

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) .

OK:

P1617 is not output.

OK

4.

REPLACE DISTANCE CONTROL ECU

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

NEXT

5.

CLEAR DTC

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

NEXT

6.

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