Ovesxus
L-SB-0008-15 March 31, 2015 Technical Service Information Bulletin

Reception Diagnosis Using Antenna Test Kit

Service
Category Audio/Visual/Tefematics
Lexus Supports AS
Section Audio/Video Market USA ASE Certilication gg
Applicability
YEAR(S) MODEL(S) ADDITIONAL INFORMATION
1990 ~ 2015 CT200H, ES250,

ES300, ES300H,
E5330, ES350,
GS300, GS350,
GS400, GS430,
GS450H, GS460,
GX460, GX470,
HS250H, IS F,
15250, 1S250C,
1$300, 1S350, IS350C,
LFA, LS400, LS430,
LS460, LS600H,
LX450, LX470, LX570,
NX200T, NX300H, RC
F, RC350, RX300,
RX330, RX350,
RX400H, RX450H,
$C300, SC400, $C430

Introduction

Lexus has developed a special Antenna Test Kit to aid in the diagnosis of vehicles with very poor,
inoperative, or no AM/FM, XM Satellite, and/or GPS/DCM reception. Follow the procedures in this
bulletin to address these conditions.

Warranty Information

OP CODE DESCRIPTION TIME OFP T1 T2

NIA Not Applicable to Warranty = 7 - |-

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Reception Diagnosis Using Antenna Test Kit

Required Tools & Equipment

SPECIAL SERVICE TOOLS (SST} PART NUMBER QTy
Antenna Test Kit* 11014-00007 1

* Essential SST.

Additional SSTs may be ordered by calling 1-800-933-8335.

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QIOVOTA Oumar Gs 11014-00007 Antenna Feat kee

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Reception Diagnosis Using Antenna Test Kit

Required Toots & Equipment (Continued)

SST COMPONENT PART NUMBER COMPONENT NAME
01414-00094 Radio Antenna
01414-00095 Radio Conversion Cable
01414-00098 AM Antenna
01414-00099 XM Conversion Cable
01414-00096 GPS Antenna
01414-00097 GPS Conversion Cable

Diagnostic Procedure

1. Confirm abnormal reception condition as described in the Introduction.

NOTE

Before using the Antenna Test Kit, the abnormal condition needs to be verified/duplicated and
in many cases compared to a similar vehicle with the same equipment. Once a condition is
duplicated and judged abnormal by comparison to a similar vehicle, the Antenna Test Kit may
be a valuable tool to isolate the cause of a given condition.

The same or comparable equipment means the same model number radio, extension box type
and firmware, vehicle model, and integrated navigation system. When there are firmware
options, it should always be considered when verifying comparable vehicles.

Examples of Abnormal Conditions Requiring Vehicle/System Comparison:
* Radio AM and FM reception performance
* SAT radio cuts out intermittently
* HD radio cuts out intermittently
* NAV cursor jumps to a parallel road
* NAV turn-by-turn guidance timing
* HD traffic update timing
Examples of Abnormal Conditions NOT Requiring Vehicle/System Comparison:
* No.AM or FM_sound at_all
* No XM preview channels or audio

* No GPS cursor or satellites listed in diagnostic mode

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Reception Diagnosis Using Antenna Test Kit

Diagnostic Procedure (Continued)
2. Check vehicle harnesses and coax cable for the following conditions:
* End-to-end resistance of the center conductor
* Short from conductor to the shield
* Short from conductor to chassis ground

* Pin fit at each end on each terminal

NOTE

If an “end-to-end resistance check” results in the DVOM display constantly increasing in value,
there might be a capacitor in the harness, making the check invalid.

Repair Procedure
AM/FM Radio Reception
1. Drive the vehicle outside and verify very poor, inoperative, or no AM/FM radio reception.

2. Gather detailed information from the customer on when and where the problem occurs (e.g.,

indoor/outdoor, certain locations only, certain weather conditions, AM/FM or both, or individual
stations affected).

3. Check for aftermarket accessories or other items that may affect reception (e.g., Rear Seat
Entertainment [RSE] system, radar detectors, FM modulator, metallic window tint, objects
hanging from mirror, toll passes, items laying on dash, etc.}. Disconnect or remove the
component and recheck reception.

4, Check all antenna connections.

A. Confirm secure antenna connection(s) at the back of the radio.

B. Confirm secure antenna connections at the mast antenna or glass antenna connector.
5. Check the signal using the Antenna Test Kit.

Disconnect the vehicle antenna and connect the Radio Antenna from the Antenna Test Kit at the
back of the radio, then drive the vehicle outside. Use the Radio Conversion Cable if necessary.

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Reception Diagnosis Using Antenna Test Kit

Repair Procedure

AM/FM Radio Reception (Continued)

NOTE
When connecting the test antenna, pay attention to the following:

* The focation of plugging in the antenna will determine the potential cause (at the radio
connector, or at the rear of the vehicle on the coax cable).

* Putting the test antenna in place of a vehicle's glass or diversity antenna may provide
false (better than normal or characteristic) results and might not justify a repair without
vehicle performance comparison.

* Ifthe test antenna does not make a difference, consider other possible interfering factors
such as customer accounts, radio stations, trees, buildings, etc.

Figure 2. Radio Antenna and Conversion Cable

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Reception Diagnosis Using Antenna Test Kit

Repair Procedure

AM/FM Radio Reception (Continued)

NOTE

¢ Comparison vehicles are a good resource to determine what kind of reception is available
in the area.

* If appropriate and within dealer policy, temporarily swapping a component (radio head
unit, extension box, NAV ECU, etc.) between the problem vehicle and a dealer-owned
vehicle is one method to confirm the cause.

Did the radio reception improve?

* YES — Continue to step 6 for vehicles with glass antenna, or step 7 for vehicles with
pole antenna.

* NO — Refer to applicable Repair Manual for further reception diagnosis.
6. Inspect the glass antenna for open/cut patterns.
* If an open pattern is found, repair as needed and recheck reception quality.

* If NO open pattern is found or reception is still poor after glass antenna repair, go to step 8
for antenna amplifier systems.

NOTE

Because a noise filter may exist in the antenna plug, which plugs into the radio, the antenna
cable will normally show an open circuit when checking continuity.

7. Connect the Radio Antenna from the Antenna Test Kit at the pole antenna connection.

Did the reception improve?

* YES — Replace the mast antenna assembly. (Refer to applicable Repair Manual
for instructions.)

> NO—
* For vehicles with antenna amplifier systems, go to step 8.

* For vehicles without antenna amplifier systems, refer to applicable Repair Manual for
further antenna amplifier reception diagnosis.

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Reception Diagnosis Using Antenna Test Kit

Repair Procedure

AM/FM Radio Reception (Continued)

8. Inspect the antenna amplifier (if equipped). (Refer to applicable Repair Manual for instructions.)

* If antenna amplifier is receiving power:

* For vehicles where the amplifier is part of the antenna cable, replace the antenna cable.
(Refer to applicable Repair Manual for instructions.)

* For vehicles where the amplifier is separate, plug the antenna cable directly into
the antenna.

- if antenna amplifier is NOT receiving power, inspect ANT+B wiring from radio and confirm