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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DESCRIPTION If the vehicle information stored in the main body ECU (multiplex network body ECU) which is sent via CAN communication during the clearance warning ECU assembly self-diagnosis does not match that of clearance warning ECU assembly, DTC C168D is stored. DTC No. Detection Item DTC D
PARTS LOCATION ILLUSTRATION *1 TIRE PRESSURE WARNING ECU AND RECEIVER *2 TIRE PRESSURE WARNING VALVE AND TRANSMITTER ILLUSTRATION *1 STEERING PAD SWITCH ASSEMBLY *2 COMBINATION METER ASSEMBLY - TIRE PRESSURE WARNING LIGHT - MULTI-INFORMATION DISPLAY *3 MAIN BODY ECU (MUL
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