READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)
CHECK HARNESS AND CONNECTOR (STARTER RELAY (ST) - ECM)
ECD SYSTEM - Starter Signal Circuit |
DESCRIPTION
While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly*1 or terminal STAR of the power management control ECU*2 to the park/neutral position switch assembly*3 or clutch pedal switch assembly (for Clutch Start System)*4 and also flows to terminal STA of the ECM (STA Signal).*1: w/o Entry and Start System
*2: w/ Entry and Start System
*3: for Automatic Transmission
*4: for Manual Transmission
WIRING DIAGRAM
Refer to DTC P0617 (LandCruiser RM000000TA01KAX_05.html).INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses of circuits related to this system before performing the following inspection procedure.
- After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0ARX.html) and initialization (LandCruiser RM000000TIN08CX.html).
- HINT:
- This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to Problem Symptoms Table (LandCruiser RM0000012WF0ABX.html).
| 1.READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.
Read the value.
- OK:
Ignition Switch Condition Starter Signal ON OFF START ON
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| OK | ||
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| 2.CHECK HARNESS AND CONNECTOR (STARTER RELAY (ST) - ECM) |
Remove the ST relay from the engine room relay block.
Disconnect the ECM connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition ST relay terminal 2 - G57-6 (STA) Always Below 1 Ω ST relay terminal 2 or G57-6 (STA) - Body ground Always 10 kΩ or higher
Reinstall the starter relay (ST).
Reconnect the ECM connectors.
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| OK | ||
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