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Diagnostic Procedure
NGEC0789
1 CHECK CLOSED THROTTLE POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect throttle position switch harness connector.
AEC653A
3. Turn ignition switch ON.
4. Check voltage between terminal 5 and engine ground with CONSULT-II or tester.
SEF715U
Voltage: Battery voltage
OK or NG
OK 䊳 GO TO 3.
NG 䊳 GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
쐌 Harness for open or short between throttle position switch and ECM relay
쐌 Harness for open or short between throttle position switch and ECM
䊳 Repair harness or connectors.
3 CHECK CLOSED THROTTLE POSITION SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 28 and switch terminal 4.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 4.
NG 䊳 Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0510 CLOSED THROTTLE POSITION SWITCH
VG33E
Diagnostic Procedure
EC-1036
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