Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001A8H003X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: ON-VEHICLE INSPECTION; 2007 MY LX470 [08/2006 -        ]

ON-VEHICLE INSPECTION

1. CHECK STEREO COMPONENT AMPLIFIER CIRCUIT

(a) Disconnect the S18 amplifier connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

S18-12 (E) - Body ground

Below 1 Ω

S18-13 (GND2) - Body ground

Below 1 Ω

(c) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Specified Condition

S18-7 (+B) - Body ground

10 to 14 V

S18-16 (+B2) - Body ground

10 to 14 V
  • If the results are not as specified, there may be a malfunction on the wire harness side.

2. CHECK STEREO COMPONENT CONTROLLER ASSEMBLY CIRCUIT

(a) Disconnect the R39 controller connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

R39-17 (GND) - Body ground

Below 1 Ω

(c) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Condition

Specified Condition

R39-24 (ACC) - Body ground

Ignition switch OFF, radio receiver switch ON

Below 1 V

R39-24 (ACC) - Body ground

Ignition switch ACC or ON, radio receiver switch ON

10 to 14 V

R39-12 (+B) - Body ground

Always

10 to 14 V
  • If the results are not as specified, there may be a malfunction on the wire harness side.

3. CHECK DISC PLAYER CHANGER CIRCUIT (w/ NAVIGATION SYSTEM)

(a) Disconnect the D32 changer connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

D32-20 (GND) - Body ground

Below 1 Ω

(c) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Condition

Specified Condition

D32-1 (ACC) - Body ground

Ignition switch OFF

Below 1 V

D32-1 (ACC) - Body ground

Ignition switch ACC or ON

10 to 14 V

D32-10 (+B) - Body ground

Always

10 to 14 V
  • If the results are not as specified, there may be a malfunction on the wire harness side.

4. CHECK RADIO RECEIVER ASSEMBLY CIRCUIT

(a) Disconnect the R37 receiver connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

R37-20 (GND) - Body ground

Below 1 Ω

(c) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Condition

Specified Condition

R37-1 (BU) - Body ground

Always

10 to 14 V

R37-11 (ACC) - Body ground

Ignition switch OFF

Below 1 V

R37-11 (ACC) - Body ground

Ignition switch ON

10 to 14 V
  • If the results are not as specified, there may be a malfunction on the wire harness side.

HINT:

Check the wire harness between radio receiver assembly and disc player changer, between radio receiver assembly and stereo component amplifier.

5. CHECK STEERING PAD SWITCH

(a) Disconnect the C20 switch connector.

(b) Measure the resistance of the switch.

Standard resistance:

Tester Connection

Condition

Specified Condition

C20-12 (AU1) - C20-10 (EAU)

Not pushed

Approx. 100 kΩ

C20-12 (AU1) - C20-10 (EAU)

SEEK+ switch pushed

Below 1 Ω

C20-12 (AU1) - C20-10 (EAU)

SEEK- switch pushed

Approx. 0.3 kΩ

C20-12 (AU1) - C20-10 (EAU)

VOL+ switch pushed

Approx. 1 kΩ

C20-12 (AU1) - C20-10 (EAU)

VOL- switch pushed

Approx. 3.2 kΩ

C20-11 (AU2) - C20-10 (EAU)

Not pushed

Approx. 100 kΩ

C20-11 (AU2) - C20-10 (EAU)

MODE switch pushed

Below 1 Ω
  • If the result is not as specified, the switch may have a malfunction.