Inspection Procedure
- READ VALUE USING TECHSTREAM (IG2 RELAY MONITOR (INSIDE))
- Use the Data List to check if the IG2 relay is functioning properly.
Main Body
ITEM RANGE REFERENCETester Display Measurement Item/Range Normal Condition Diagnostic Note IG2 Relay Monitor (Inside) IG2 inner relay monitor/ON or OFF ON: Engine switch on (IG)
OFF: Engine switch off- OK: When the engine switch is turned on (IG), ON is displayed on the Techstream.
NG: Go to step 3
OK: Go to next step.
- Use the Data List to check if the IG2 relay is functioning properly.
- CHECK ENGINE SWITCH (SWITCH CONDITION)
- Ensure the key is inside the cabin.
- Check that the power source mode changes as shown below each time the engine switch is pushed.
OK: off → on (ACC) → on (IG) → off
NG: GO TO POWER SOURCE MODE DOES NOT CHANGE
OK: NORMAL
- INSPECT IGNITION RELAY NO. 2 (IG2)
- Remove the ignition relay No. 2 from the engine room No. 2 junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE REFERENCETester Connection Condition Specified Condition 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω NG: REPLACE IGNITION RELAY NO. 2 (IG2)
OK: Go to next step.
- CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU AND BODY GROUND)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the IG2 relay from the engine room No. 2 junction block.
- Disconnect the L12 main body ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE REFERENCETester Connection Condition Specified Condition Relay block IG2 relay terminal 1 - L12-11 (IG2D) Always Below 1 Ω Relay block IG2 relay terminal 2 - Body ground Always Below 1 Ω Relay block IG2 relay terminal 1 or L12-11 (IG2D) - Body ground Always 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE MAIN BODY ECU