Inspection Procedure
WARNING: This page is about a different variant/trim than selected.
- INSPECT ENGINE SWITCH
- Remove the engine switch (See REMOVAL ).
- Apply battery voltage to the switch and check the illumination condition of the engine switch indicator light.NOTE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator light does not illuminate.
- If the voltage is too low, the indicator light does not illuminate.
OK
MEASUREMENT CONDITION SPECIFICATIONMeasurement Condition Condition Specified Condition Battery terminal (+) → Terminal 11 (SWIL)
Battery terminal (-) → Terminal 4 (COM) or 5 (GND)Battery voltage is applied to the terminals Illuminates Battery terminal (+) → Terminal 12 (INDS)
Battery terminal (-) → Terminal 4 (COM) or 5 (GND)Battery voltage is applied to the terminals Illuminates (green) Battery terminal (+) → Terminal 13 (INDW)
Battery terminal (-) → Terminal 4 (COM) or 5 (GND)Battery voltage is applied to the terminals Illuminates (amber) NG: REPLACE ENGINE SWITCH (See REMOVAL )
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)
- Disconnect the E78 engine switch connector.
- Disconnect the E16 and E17 main body ECU connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition E78-11 (SWIL) - E16-8 (SWIL) Always Below 1 Ω E78-12 (INDS) - E17-1 (INDS) Always Below 1 Ω E78-13 (INDW) - E17-8 (INDW) Always Below 1 Ω E78-5 (GND) - Body ground Always Below 1 Ω E78-4 (COM) - Body ground Always Below 1 Ω E78-11 (SWIL) or E16-8 (SWIL) - Body ground Always 10 kΩ or higher E78-12 (INDS) or E17-1 (INDS) - Body ground Always 10 kΩ or higher E78-13 (INDW) or E17-8 (INDW) - Body ground Always 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)