P022

DTC P022:

PCM Sensor Circuit:

CIRCUIT DESCRIPTION
The Throttle Position (TP) sensor is potentiometer. A 5 volt reference is provided on CKT 474 and ground is provided on CKT 808. The TP sensor signal CKT 417 varies between ground and 5 volts based on the position of the throttle plates. At low throttle angle, the TP sensor signal voltage is low. The Powertrain Control Module (PCM) uses TP sensor information to determine idle, Wide Open Throttle (WOT), deceleration enleanment and acceleration enrichment. Code P022 sets when the PCM detects a TP sensor signal that is too low.

TEST CONDITION
rpm 600 or greater.

FAILURE CONDITION
TP sensor of -5 degrees or less for 0.1 second.

ACTION TAKEN
1. PCM turns "ON" the Malfunction Indicator Lamp (MIL) (Service Engine Soon).
2. PCM disables the Torque Converter Clutch.
3. PCM sets TP sensor value equal to 13 degrees when the throttle position switch is open and to 6 degrees when the throttle position switch is closed.
4. PCM freezes transaxle in current gear.

NOTES ON FAULT TREE
1. If Codes P032, P036, or P103 are also set, CKT 474 must be open or shorted to ground because TP sensor and MAP sensor share the same 5 volt signal.
2. With TP sensor or wiring open, PCM data parameter PD01 will read -5 or less.
3. Checking for open TP sensor or open wiring. If the data value stays less than 85 with the TP sensor terminals A and "C" jumpered together, the problem is in the wiring.
4. Voltage should be greater than 0.5 volt if CKT 474 is not open or shorted to ground.
5. Checking if CKT 474 is open or if CKT 417 is shorted to ground.
6. Checking if signal is reaching PCM. If signal is reaching PCM, then the fault is with the PCM.