Inspection Procedure

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the ignition switch to the ON position.
Turn the Techstream on.
Enter the following menus: Powertrain / Laser Cruise / Data List.
Check the Data List for proper functioning of the cruise control main switch.

Fig 1: Identifying Cruise Control Main Switch Direction

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Hybrid Vehicle Control ECU (Laser Cruise):

DIAGNOSTIC NOTE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
CCS Main SW M-CPU	Main switch signal (Main CPU)/ ON or OFF	ON: Main switch on OFF: Main switch off	-
Cancel Switch	CANCEL switch signal/ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
SET/COAST Switch	- (COAST)/SET switch signal/ON or OFF	ON: - (COAST)/SET switch on OFF: - (COAST)ZSET switch off	-
RES/ACC Switch	+ (ACCEL)/RES switch signal/ON or OFF	ON: + (ACCEL)/RES switch on OFF: + (ACCEL)/RES switch off	-

OK: When cruise control main switch operation is performed, the result will be same as above.

Result:

RESULT CHART

Result	Proceed to
OK	A
NG (all items are defective)	B
NG (1 to 3 items are defective)	C

A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C: REPLACE CRUISE CONTROL MAIN SWITCH

B: Go to next step.

INSPECT CRUISE CONTROL MAIN SWITCH

Disconnect the cruise control main switch connector.

Fig 2: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
1 - 2, 1 - 3	Neutral	10 kΩ or higher
1 - 3	+/RES	235 to 245 Ω
1 - 3	-ISET	620 to 640 Ω
1 - 3	CANCEL	1510 to 1570 Ω
1 - 3	Main Switch ON	Below 1 Ω
1 - 2	MODE	Below 1 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH

OK: Go to next step.

INSPECT SPIRAL CABLE

NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the article shown in the brackets.

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )

Remove the spiral cable.
Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Condition	Spiral Cable Position	Specified Condition
A-1 - C13-7	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
A-3 - C13-1	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
A-4 - C13-2	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Fig 3: Inspecting Spiral Cable

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE

CHECK WIRE HARNESS (SPIRAL CABLE - HYBRID VEHICLE CONTROL ECU)

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
C13-1 - H29-28 (CCS)	Always	Below 1 Ω
C13-7 - H29-18 (CCHG)	Always	Below 1 Ω
C13-1 - Body ground	Always	10 kΩ or higher
C13-7 - Body ground	Always	10 kΩ or higher

Fig 4: Checking Wire Harness (Spiral Cable - Hybrid Vehicle Control ECU)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)
1. Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
C13-2 - Body ground	Always	Below 1 Ω

Fig 5: Identifying C13 Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE HYBRID VEHICLE CONTROL ECU