DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (ECU-IG RH)
INSPECT MULTIPLEX TILT & TELESCOPIC ECU (IG TERMINAL VOLTAGE)
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND)
CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH)
POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM - IG Power Source Circuit
DESCRIPTION
When the engine switch is turned on (IG), the IG power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.
The multiplex tilt & telescopic ECU also receives engine switch signals via this circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT FUSE (ECU-IG RH) |
Remove the ECU-IG RH fuse from the main body ECU RH (cowl side J/B RH).
Measure the resistance of the ECU-IG RH fuse.
- Standard resistance:
- Below 1 Ω
| 2.INSPECT MULTIPLEX TILT & TELESCOPIC ECU (IG TERMINAL VOLTAGE) |
Disconnect the J28 connector from the multiplex tilt & telescopic ECU.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester connection
(Terminal No.) | Condition | Specified value |
| IG (J28-8) - GND (J28-11) | Engine switch on (IG) | 10 to 14 V |
| | PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
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| 3.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - BODY GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
(Terminal No.) | Condition | Specified value |
| GND (J28-11) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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| 4.CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH) |
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
| Tester condition | Condition | Specified value |
| RA-1 - Body ground | Engine switch on (IG) | 10 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (MULTIPLEX TILT & TELESCOPIC ECU - MAIN BODY ECU RH) |
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| NG | |
| |
| REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU RH (COWL SIDE J/B RH) - BATTERY) |
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LEXUS IS250, IS220d / GSE20 ALE20
