Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check for open or short circuit in harness and connector between navigation ECU and television camera ECU.

Disconnect the connector from navigation ECU and television camera ECU.
Measure the resistance according to the value(s) in the table below.

Fig 1: Checking Open Or Short Circuit In Harness And Connector Between Navigation ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

TERMINAL RESISTANCE SPECIFICATION CHART

Tester connection	Condition	Specified condition
R - R1	Always	Below 1 Ω
G - G1	Always	Below 1 Ω
B - B1	Always	Below 1 Ω
SYNC - SYN1	Always	Below 1 Ω
VR - VR1	Always	Below 1 Ω
VG - VG1	Always	Below 1 Ω
R - Body ground	Always	10 kΩ or higher
G - Body ground	Always	10 kΩ or higher
B - Body ground	Always	10 kΩ or higher
SYNC - Body ground	Always	10 kΩ or higher
VR - Body ground	Always	10 kΩ or higher

Fig 2: Open Or Short Circuit In Harness And Connector Between Television Camera ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Repair or replace harness or connector.
OK: Go To Next Step

Check for open or short circuit in harness and connector between television camera ECU and multi-display assembly.

Disconnect the connector from the television camera ECU and multi-display assembly.

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

Standard:

TERMINAL RESISTANCE SPECIFICATION CHART

Tester connection	Condition	Specified condition
R (T31-10) - R (M5-24)	Always	Below 1 Ω
G (T31-11) - G (M5-25)	Always	Below 1 Ω
B (T31-12) - B (M5-26)	Always	Below 1 Ω
SYNC (T31-31) - SYNC (M5-27)	Always	Below 1 Ω
VR (T31-32) - VR (M5-23)	Always	Below 1 Ω
VG (T31-9) - VG (M5-28)	Always	Below 1 Ω
R (T31-10) - Body ground	Always	10 kΩ or higher
G (T31-11) - Body ground	Always	10 kΩ or higher
B (T31-12) - Body ground	Always	10 kΩ or higher
SYNC (T31-31) - Body ground	Always	10 kΩ or higher
VR (T31-32) - Body ground	Always	10 kΩ or higher

Fig 3: Checking Open Or Short Circuit In Harness And Connector Between Television Camera ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Checking Open Or Short Circuit In Harness And Connector Between Multi-Display Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Repair or replace harness or connector.
OK: Go To Next Step

Check for open or short circuit in harness and connector between television camera ECU and television camera.

Disconnect the T31 connector from the television camera ECU.
Disconnect the T30 connector from the television camera assembly.

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

Standard:

TERMINAL RESISTANCE SPECIFICATION CHART

Tester connection (Terminal No.)	Condition	Specified condition
CB+ (T31-20) - CB+ (T30-4)	Always	Below 1 Ω
CGND (T31-19) - CGND (T30-3)	Always	Below 1 Ω
CV+ (T31-40) - CV+ (T30-2)	Always	Below 1 Ω
CV- (T31-39) - CV- (T30-1)	Always	Below 1 Ω
CB+ (T31-20) - Body ground	Always	10 kΩ or higher
CGND (T31-19) - Body ground	Always	10 kΩ or higher
CV+ (T31-40) - Body ground	Always	10 kΩ or higher
CV- (T31-39) - Body ground	Always	10 kΩ or higher

Fig 5: Checking Open Or Short Circuit In Harness And Connector Between Television Camera ECU And Television Camera

NG: Repair or replace harness or connector.
OK: Go To Next Step

Check voltage between terminals +CB and CGND of television camera.

Connect the T31 connector to the television camera ECU.

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

Standard:

TERMINAL VOLTAGE SPECIFICATION

Tester connection (Terminal No.)	Condition	Specified condition
CB+ (T30-4) - CGND (T30-3)	IG SW ON, shift lever R position	Approx. 6 V

Fig 6: Checking Voltage Between Terminals +CB And CGND Of Television Camera

NG: Replace television camera ECU.
OK: Proceed to next circuit inspection shown in problem symptoms table. (See PROBLEM SYMPTOMS TABLE )