Lexus NX: Relay
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT JUNCTION BLOCK
| *1 | Main Body ECU | - | - |
| *a | Component without harness connected (Junction Block) | *b | Component without main body ECU connected (Junction Block) |
NOTICE:
Before performing the relay inspections for the relays of the junction block, inspect the ECU-IG NO. 2, ECU-IG NO. 4 and ECU-IG NO. 5 fuses.
(a) Inspect the IG1 NO. 1 relay.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 4F-1 - 4C-21 | Battery voltage not applied to terminals 4B-46 and -4D-28 | 10 kΩ or higher |
| Battery voltage applied to terminals 4B-46 and 4D-28 | Below 1 Ω |
If the result is not as specified, replace the junction block.
(b) Inspect the IG1 NO. 2 relay.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 4F-1 - 4C-41 | Battery voltage not applied to terminals 4B-46 and -4D-28 | 10 kΩ or higher |
| Battery voltage applied to terminals 4B-46 and 4D-28 | Below 1 Ω |
If the result is not as specified, replace the junction block.
(c) Inspect the IG1 NO. 3 relay.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 4F-1 - 4D-34 | Battery voltage not applied to terminals 4B-46 and -4D-28 | 10 kΩ or higher |
| Battery voltage applied to terminals 4B-46 and 4D-28 | Below 1 Ω |
If the result is not as specified, replace the junction block.
2. INSPECT EFI MAIN RELAY (EFI MAIN)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3 - 5 | Battery voltage not applied to terminals 1 and 2 | 10 kΩ or higher |
| Battery voltage applied to terminals 1 and 2 | Below 1 Ω |
If the result is not as specified, replace the EFI main relay.
3. INSPECT EFI MAIN NO. 2 RELAY (EFI MAIN NO. 2)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3 - 5 | Battery voltage not applied to terminals 1 and 2 | 10 kΩ or higher |
| Battery voltage applied to terminals 1 and 2 | Below 1 Ω |
If the result is not as specified, replace the EFI main No. 2 relay.
4. INSPECT IGNITION NO. 2 MAIN RELAY (IG2-MAIN)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3 - 5 | Battery voltage not applied to terminals 1 and 2 | 10 kΩ or higher |
| Battery voltage applied to terminals 1 and 2 | Below 1 Ω |
If the result is not as specified, replace the ignition No. 2 main relay.
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Use the following procedure to troubleshoot the safety connect system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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