Pinpoint Test AA

AA : P1243. Sensor Ground Circuits.

AA1 : CHECK THE GROUND CIRCUIT TO THE ENGINE COOLANT TEMPERATURE SENSOR.
1. Measure the resistance between engine coolant temperature sensor electrical connector PI25, pin 1 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA2

No
Repair the circuit between the engine coolant temperature sensor electrical connector PI25, pin 1 (BG) and GROUND.
This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA2 : CHECK THE GROUND CIRCUIT TO THE ENGINE OIL TEMPERATURE SENSOR.
1. Measure the resistance between engine oil temperature sensor electrical connector PI24, pin 2 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA3

No
Repair the circuit between the engine oil temperature sensor electrical connector PI24, pin 2 (BG) and GROUND.
This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA3 : CHECK THE GROUND CIRCUIT TO THE FUEL INJECTION PRESSURE SENSOR.
1. Measure the resistance between fuel injection pressure sensor electrical connector IL12, pin 2 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA4

No
Repair the circuit between the fuel injection pressure sensor electrical connector IL12, pin 2 (BG) and GROUND.
This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA4 : CHECK THE GROUND CIRCUIT TO THE EFT SENSOR.
1. Measure the resistance between EFT Sensor electrical connector IL09, pin 1 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA5

No
Repair the circuit between the EFT Sensor electrical connector IL09, pin 1 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA5 : CHECK THE GROUND CIRCUIT TO THE MAP SENSOR.
1. Measure the resistance between MAP Sensor electrical connector PI29, pin 4 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA6

No
Repair the circuit between the MAP Sensor electrical connector PI29, pin 4 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA6 : CHECK THE GROUND CIRCUIT TO THE FUEL TANK PRESSURE SENSOR.

NOTE: Access to the FTP sensor involves the removal of the fuel tank. To reduce the amount of work necessary, a slave harness could be used. This can be connected at the access port beneath the rear seat. Tests can then be carried out via the slave harness and sensor. If system operation is normal with the slave harness and sensor, the fault lies in the vehicle's harness or sensor.

1. Measure the resistance between FTP Sensor electrical connector FP01, pin 2 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA7

No
Repair the circuit between the FTP Sensor electrical connector FP01, pin 2 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA7 : CHECK THE GROUND CIRCUIT TO THE APP SENSOR. (Track 1)
1. Measure the resistance between APP Sensor electrical connector CA88, pin 6 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA8

No
Repair the circuit between the APP Sensor electrical connector CA88, pin 6 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA8 : CHECK THE GROUND CIRCUIT TO THE TP SENSOR.
1. Measure the resistance between TP Sensor electrical connector PI26, pin 1 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA9

No
Repair the circuit between the TP Sensor electrical connector PI26, pin 1 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA9 : CHECK THE GROUND CIRCUIT TO THE APP SENSOR. (Track 3)
1. Measure the resistance between APP Sensor electrical connector CA88, pin 3 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto AA10

No
Repair the circuit between the APP Sensor electrical connector CA88, pin 3 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

AA10 : CHECK THE GROUND CIRCUIT TO THE AIR CONDITIONING PRESSURE SENSOR.
1. Measure the resistance between ACP sensor electrical connector, FH110, pin 1 (BG) and GROUND.

Is the resistance less than 5 ohms?

Yes
No electrical fault in ground circuit. Recheck DTCs.

No
Repair the circuit between the ACP sensor electrical connector, FH110, pin 1 (BG) and GROUND. This circuit includes the PCM. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.