Lexus ES: Relay
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT MAIN RELAY (EFI-MAIN NO. 1)
| (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 between terminals 1 and 2 | 10 kΩ or higher | | Battery voltage applied between terminals 1 and 2 | Below 1 Ω | If the result is not as specified, replace the main relay (EFI-MAIN NO. 1). | |
2. INSPECT MAIN 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 between terminals 1 and 2 | 10 kΩ or higher | | Battery voltage applied between terminals 1 and 2 | Below 1 Ω | If the result is not as specified, replace the main relay (EFI-MAIN NO. 2). | |
3. INSPECT MAIN RELAY (A/F HTR)
| (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 between terminals 1 and 2 | 10 kΩ or higher | | Battery voltage applied between terminals 1 and 2 | Below 1 Ω | If the result is not as specified, replace the main relay (A/F HTR). | |
4. INSPECT ELECTRONIC DRIVER UNIT RELAY (D INJ)
| (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 between terminals 1 and 2 | 10 kΩ or higher | | Battery voltage applied between terminals 1 and 2 | Below 1 Ω | If the result is not as specified, replace the electronic driver unit relay (D INJ). | |
5. INSPECT NO. 2 IGNITION RELAY (IG2 NO. 1)
| (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 between terminals 1 and 2 | 10 kΩ or higher | | Battery voltage applied between terminals 1 and 2 | Below 1 Ω | If the result is not as specified, replace the No. 2 ignition relay (IG2 NO. 1). | |
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PRECAUTION INITIALIZATION NOTICE:
Before replacing the ECM, refer to Registration.
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Perform Registration (VIN registration) after replacing the ECM.
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Perform Learning
DEFINITION OF TERMS Term Definition Monitor Description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and details). Related DTCs Group of di
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DTC CHECK / CLEAR CHECK FOR DTCS (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. Powertrain > Hybrid Control > Trouble Codes (e) Check the DTCs and freeze frame da
DESCRIPTION DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note C1203 ECM Communication Circuit 1161 Either of the following is detected:
Identification information sent from other ECUs does not match with the value stored when shipped from the f
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