Park/Neutral Position (PNP) Switch

If PNP switch is out of adjustment, voltage signals may not be correctly applied to ECM, causing a trouble code to set. Before assuming PNP switch is faulty, adjust PNP switch. See PARK/NEUTRAL POSITION (PNP) SWITCH under MISCELLANEOUS CONTROLS in appropriate ADJUSTMENTS article.
After switch adjustment is completed, recheck for trouble code. If trouble code does not reset, PNP switch is okay. If trouble code resets, remove PNP switch. Check for continuity between specified terminals of PNP switch. See PNP SWITCH CONTINUITY table. See Fig 1. If continuity is not as specified, replace PNP switch. If continuity is as specified, install and adjust PNP switch.

PNP SWITCH CONTINUITY

Application & Switch Position	Terminals No.
P	5 & 6; 4 & 7
R	4 & 8
N	5 & 6; 4 & 10
D	4 & 9
2	2 & 4
L	3 & 4

Fig 1: Identifying PNP Switch Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If PNP switch is out of adjustment, voltage signals may not be correctly applied to ECM, causing a trouble code to set. Before assuming PNP switch is faulty, adjust PNP switch. See PARK/NEUTRAL POSITION (PNP) SWITCH under MISCELLANEOUS CONTROLS in appropriate ADJUSTMENTS article. Recheck resistance. If resistance is still not as specified, replace sub-TP sensor.

SUB-TP SENSOR RESISTANCE

Throttle Plate Position

Sub-TP Sensor Terminals

Ohm Reading

Throttle Fully Closed

VTA2 & E2

340-6300

.012" (.35 mm) ⁽¹⁾

IDL2 & E2

500 Or Less

.020" (.50 mm) ⁽¹⁾

IDL2 & E2

Infinite (Open)

Throttle Fully Open

VTA2 & E2

2400-11,200

All Positions

VC & E2

3100-7200

⁽¹⁾	Remove sub-throttle actuator from throttle body. Insert feeler gauge between sub-throttle valve stop screw and gear.

Fig 1: Identifying Terminals Of Sub-TP Sensor & TP Sensor