Lexus ES: Telephone Sub Antenna Circuit Short to Ground (B153711,B153713)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the telephone and GPS antenna assembly (for Front Side).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B153711 | Telephone Sub Antenna Circuit Short to Ground | Telephone antenna (sub) impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG) (Short circuit) |
|
| B153713 | Telephone Sub Antenna Circuit Open | Telephone antenna (sub) impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG) (Open circuit) |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.
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HINT:
Refer to "PARTS LOCATION" for the installation location of telephone and GPS antenna cord.
Click here
PROCEDURE
| 1. | CHECK DTC |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and wait for 10 seconds or more.
(d) Turn the Techstream on.
(e) Clear the DTCs.
Body Electrical > Telematics > Clear DTCs(f) Check for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble CodesOK:
No DTCs are output.
| OK |  | USE SIMULATION METHOD TO CHECK |
|
| 2. | INSPECT TELEPHONE AND GPS ANTENNA ASSEMBLY (FOR FRONT SIDE) |
| (a) Remove the telephone and GPS antenna assembly (for Front Side). Click here |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 4 - 4a | Always | 9 to 11 kΩ |
| NG | | REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (FOR FRONT SIDE) |
|
| 3. | INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) |
| (a) Disconnect the antenna connector from the telephone and GPS antenna assembly (for Front Side). |
|
| (b) Disconnect the antenna connector from the DCM (telematics transceiver). |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-1 - D-4 | Always | Below 1 Ω |
| A-1a - D-4a | Always | Below 1 Ω |
| A-1 or D-4 - Body ground | Always | 10 kΩ or higher |
| NG | | REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) |
|
| 4. | REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (telematics transceiver) with a new one.
Click here
NOTICE:
- The engine switch must be off.
- Do not exchange the DCM (telematics transceiver) with one from another vehicle.
| NEXT | | PERFORM DCM ACTIVATION |
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DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects a malfunction in the telephone microphone assembly circuit. DTC No. Detection Item DTC Detection Condition Trouble
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Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. REMOVE NO. 2 DOOR TRIM PAD Click here 2. REMOVE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT DOOR UPPER ARMREST BASE PANEL (for Driver
