| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM00000184204UX |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: INSPECTION PROCEDURE (2008 Sequoia) | ||
|
Stereo Component Amplifier Communication Error |
INSPECTION PROCEDURE
PROCEDURE
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1. |
IDENTIFY COMPONENT SHOWN BY SUB-CODE |
(a) Enter the diagnostic mode.
(b) Press the preset switch "3" to change to "Detailed Information Mode".
(c) Identify the component shown by the sub-code.
HINT:
- "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.
-
For details of the DTC display, refer to "DTC Check/Clear"
.
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2. |
CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE |
(a) Inspect the power source circuit of the component shown by the sub-code.
If the power source circuit is operating normally, proceed to the next step.
HINT:
The "Bluetooth" handsfree module is built into the radio receiver.
Component Table
|
Component |
Proceed to |
|---|---|
|
"Bluetooth" handsfree module (19D) |
Radio Receiver Power Source Circuit
|
|
Radio receiver (190) |
Radio Receiver Power Source Circuit
|
|
Television display (1B0)* |
Television Display Assembly Power Source Circuit
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HINT:
*: w/ Rear Seat Entertainment System
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3. |
INSPECT RADIO RECEIVER ASSEMBLY |
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(a) Disconnect the I4 and I8* radio receiver assembly connectors. HINT:
*: w/ Rear Seat Entertainment System |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I4-5 (ATX+) - I4-15 (ATX-) |
Always |
60 to 80 Ω |
|
I8-9 (TXM+) - I8-10 (TXM-)* |
Always |
60 to 80 Ω |
(c) Reconnect the radio receiver assembly connectors.
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4. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT SHOWN BY SUB-CODE) |
HINT:
- Start the check from the circuit that is near the component shown by the sub-code first.
-
For details of the connectors, refer to "Terminals of ECU"
.
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the stereo component amplifier assembly and the component shown by the sub-code.
(1) Disconnect all connectors between the stereo component amplifier assembly and the component shown by the sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the stereo component amplifier assembly and the component shown by the sub-code.
OK:
There is no open or short circuit.
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5. |
REPLACE COMPONENT SHOWN BY SUB-CODE |
(a) Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.
OK:
Same problem does not occur.
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