Inspection Procedure

READ VALUE OF INTELLIGENT TESTER OR TECHSTREAM (CRUISE CONTROL MAIN SWITCH)

Check the DATA LIST for proper functioning of the cruise control switch.

Intelligent tester

RADAR CRUISE

INTELLIGENT TESTER - RADAR CRUISE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
MAIN SW (MAIN)	Cruise control switch signal (Main CPU) / ON or OFF	ON: Cruise control switch is ON OFF: Cruise control switch is OFF	-
CANCEL SW	Cancel switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
SET/COAT SW	-/SET switch signal / ON or OFF	ON: -/SET switch ON OFF: -/SET switch OFF	-
RES/ACC SW	+/RES switch signal / ON or OFF	ON: +/RES switch ON OFF: +/RES switch OFF	-

Techstream

Radar Cruise

TECHSTREAM - RADAR CRUISE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Cruise Control Main Switch	Cruise control switch signal (Main CPU)/ON or OFF	ON: Cruise control switch is ON OFF: Cruise control switch is OFF	-
Cancel Switch	Cancel switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
SET/COAT Switch	-/SET switch signal / ON or OFF	ON: -/SET switch ON OFF: -/SET switch OFF	-
RES/ACC Switch	+/RES switch signal / ON or OFF	ON: +/RES switch ON OFF: +/RES switch OFF	-

OK: When cruise control switch operation is performed, the results are same as above.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

INSPECT CRUISE CONTROL SWITCH

Disconnect the cruise control switch connector.

Measure the resistance of the switch.

Standard resistance

CRUISE CONTROL SWITCH

Tester Connection	Switch Condition	Specified Condition
1 - 3	RES/ACC switch is held ON	235 to 245 Ω
1 - 3	SET/COAST switch is held ON	620 to 640 Ω
1 - 3	CANCEL switch is held ON	1510 to 1570 Ω
1 - 3	Cruise control switch OFF	10 kΩ or higher
1 - 3	Cruise control switch ON	Below 1 Ω
1 - 2	MODE switch is held ON	Below 1 Ω

Fig 1: Inspecting Cruise Control Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CRUISE CONTROL SWITCH (See CRUISE CONTROL MAIN SWITCH )

OK: GO TO NEXT STEP

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Disconnect the z2 and L24 spiral cable connectors.

Measure the resistance of the spiral cable.

Standard resistance

SPIRAL CABLE SUB-ASSEMBLY

Tester Condition	Condition	Specified Condition
z2-3 - L24-1 (CCS)	Always	Below 1 Ω
Z2-3 - L24-7 (RIB)	Always	Below 1 Ω
z2-1 - L24-2 (ECC)	Always	Below 1 Ω

Fig 2: Identifying Z2 And L24 Spiral Cable Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY (See REMOVAL )

OK: GO TO NEXT STEP

INSPECT CRUISE CONTROL SWITCH WIRE

Disconnect the z2 spiral cable connector.
Disconnect the A cruise control switch connector.

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

Standard resistance

CRUISE CONTROL SWITCH WIRE

Tester Connection	Condition	Specified Condition
z2-3 - A-3	Always	Below 1 Ω
z2-4 - A-1	Always	Below 1 Ω
A-3 - Body ground	Always	10 kΩ or higher
A3-1 - Body ground	Always	10 kΩ or higher

Fig 3: Identifying A Cruise Control Switch Connector And Z2 Spiral Cable Connector

NG: REPLACE CRUISE CONTROL SWITCH WIRE (See CRUISE CONTROL MAIN SWITCH )

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECU AND BODY GROUND)

Disconnect the L24 spiral cable connector.
Disconnect the A33 ECU connector.

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

Standard resistance

SPIRAL CABLE - ECU AND BODY GROUND

Tester Connection	Condition	Specified Condition
L24-1 (CCS) - A33-30 (CCHG)	Always	Below 1 Ω
L24-7 (R/N) - A33-27 (CCS)	Always	Below 1 Ω
L24-2 (ECC) - Body ground	Always	Below 1 Ω
L24-1 (CCS) - Body ground	Always	10 kΩ or higher
L24-7 (RIB) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying L24 Spiral Cable And A33 ECU Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE DRIVING SUPPORT ECU (See REMOVAL )