3000GT SL V6-2972cc 3.0L DOHC MFI (1997)
STEP 1: Measure the input voltage of engine control module.
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Engine control module connector: Disconnected
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Lighting switch: ON (Tail light relay ON)
Voltage: Battery positive voltage
OK: GO TO STEP 2
NG: Check circuit related to tail light relay.
STEP 2: Measure the input voltage of engine control module.
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Engine control module connector: Disconnected
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Defogger switch: ON (Defogger relay ON)
Voltage: Battery positive voltage
OK: GO TO STEP 3
NG: Check circuit related to defogger relay.
STEP 3: Measure the input voltage of engine control module.
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Engine control module connector: Disconnected
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Brake pedal: Depressed (Stop light switch ON)
Voltage: Battery positive voltage
OK: STOP
NG: Check circuit related to stoplight relay