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Home >> Saab >> 2005 >> 9-2X Linear, 251, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine (Diagnostics) - 2.5L >> Diagnostic Procedure With DTC >> DTC P0123: Throttle/Pedal Position Sensor/Switch "A" Circuit High Input >> Wiring Diagram >> Check Harness Between ECM & Electronic Throttle Control
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Check Harness Between ECM & Electronic Throttle Control

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Disconnect the connectors from electronic throttle control.

Measure the resistance between ECM connector and electronic throttle control connector.

Connector & terminal 

(B136) No. 18 - (E57) No. 6: 

Is the resistance less than 1 O? 

YES. Go to  CHECK HARNESS BETWEEN ECM & ELECTRONIC THROTTLE CONTROL  . 

NO 

Repair the open circuit of harness connector.



Connect the ECM connector.

Measure the resistance between electronic throttle control connector and engine ground.

Connector & terminal 

(E57) No. 3 - Engine ground: 

Is the resistance less than 1 O? 

YES. Go to  CHECK SENSOR OUTPUT POWER SUPPLY  . 

NO 

Repair the poor contact in ECM connector. Replace the ECM if defective.



Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance between ECM connectors.

Connector & terminal 

(B136) No. 18 - (B136) No. 16: 

Is the resistance more than 1 MO? 

YES 

Repair poor contact in harness. Repair the electronic throttle control.

NO 

Repair short circuit to sensor power supply.

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