Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.

Select the item below in the DATA LIST, and read the display on the intelligent tester.

MAIN BODY (MAIN BODY ECU):

DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PARKING BRAKE SW	Parking brake SW signal / ON or OFF	ON: Parking brake switch is ON OFF: Parking brake switch is OFF	-

OK: Normal conditions listed above are displayed.

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

NG: Go to next step.

INSPECT PARKING BRAKE SWITCH ASSEMBLY

Remove the parking brake switch assembly.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1 - Switch body	Shaft is pushed in (OFF)	10 kΩ or higher
1 - Switch body	Shaft is not pushed in (ON)	Below 1 Ω

Fig 1: Inspecting Parking Brake Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (SWITCH - INSTRUMENT PANEL J/B ASSEMBLY)

Disconnect the DC instrument panel junction block assembly connector.
Disconnect the A32 switch connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
DC-14 - A32-1	Always	Below 1 Ω
DC-14 - Body ground	Always	10 kΩ or higher

Fig 2: Identifying DC And A32 Connectors Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY