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Diagnostic Procedure
NHEC0263
1 CHECK CLOSED THROTTLE POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect throttle position switch harness connector.
SEC001C
3. Turn ignition switch “ON”.
4. Check voltage between throttle position switch terminal 5 and engine ground with CONSULT-II or tester.
SEF346X
OK or NG
OK © GO TO 3.
NG © GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
I Harness connectors E15, F18
I Harness for open or short between throttle position switch and ECM relay
I Harness for open or short between throttle position switch and ECM
© 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 56 and throttle position 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 © GO TO 4.
NG © Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0510 CLOSED THROTTLE POSITION SWITCH
Diagnostic Procedure
EC-442
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