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Home >> Jaguar >> 2008 >> XJ (X350) V8-4.2L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Diagnosis By Symptom >> Pinpoint Tests >> Electronic Engine Controls >> VIN Range: G00442->G45703 >> PINPOINT TEST G258127p26

PINPOINT TEST G258127p26



Pinpoint Tests

PINPOINT TEST G258127p26 : DTC P1243; SENSOR GROUND CIRCUITS OPEN CIRCUIT

G258127t115 : CHECK THE SENSOR GROUND AT THE THROTTLE POSITION (TP) SENSORS
1. Disconnect the throttle sensor electrical connector, PI26.
2. Measure the resistance between PI26, pin 01 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t116.

->NO
GO to Pinpoint Test G258127t117.

G258127t116 : CHECK THE THROTTLE POSITION (TP) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between PI26, pin 01 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t117.

G258127t117 : CHECK THE SENSOR GROUND AT THE ACCELERATOR PEDAL POSITION (APP) SENSOR
1. Disconnect the APP sensor electrical connector, CR14.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between CR14, pin 06 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t118.

->NO
GO to Pinpoint Test G258127t119.

G258127t118 : CHECK THE ACCELERATOR PEDAL POSITION (APP) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between CR14, pin 06 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t119.

G258127t119 : CHECK THE SENSOR GROUND AT THE FUEL TANK PRESSURE (FTP) SENSOR
1. Disconnect the FTP sensor electrical connector, FP01.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between FP01, pin 01 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t120.

->NO
GO to Pinpoint Test G258127t121.

G258127t120 : CHECK THE FUEL TANK PRESSURE (FTP) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between FP01, pin 01 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t121.

G258127t121 : CHECK THE SENSOR GROUND AT THE ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1. Reconnect the ECM electrical connector, PI01.
2. Disconnect the ECT sensor electrical connector, PI25.
3. Measure the resistance between PI25, pin 01 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t122.

->NO
GO to Pinpoint Test G258127t123.

G258127t122 : CHECK THE ENGINE COOLANT TEMPERATURE (ECT) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between PI25, pin 01 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t123.

G258127t123 : CHECK THE SENSOR GROUND AT THE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
1. Disconnect the MAP sensor electrical connector, PI29.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between PI29, pin 04 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t124.

->NO
GO to Pinpoint Test G258127t125.

G258127t124 : CHECK THE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between PI29, pin 04 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t125.

G258127t125 : CHECK THE SENSOR GROUND AT THE FUEL TEMPERATURE (FT) SENSOR
1. Disconnect the FT sensor electrical connector, IL09.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between IL09, pin 02 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t126.

->NO
GO to Pinpoint Test G258127t127.

G258127t126 : CHECK THE FUEL TEMPERATURE (FT) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between IL09, pin 02 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t127.

G258127t127 : CHECK THE SENSOR GROUND AT THE FUEL RAIL PRESSURE (FRP) SENSOR
1. Disconnect the FRP sensor electrical connector, IL12.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between IL12, pin 02 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t128.

->NO
GO to Pinpoint Test G258127t129.

G258127t128 : CHECK THE FUEL RAIL PRESSURE (FRP) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between IL12, pin 02 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t129.

G258127t129 : CHECK THE SENSOR GROUND AT THE ENGINE OIL TEMPERATURE (EOT) SENSOR
1. Disconnect the EOT sensor electrical connector, PI38.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between PI24, pin 02 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t130.

->NO
GO to Pinpoint Test G258127t131.

G258127t130 : CHECK THE ENGINE OIL TEMPERATURE (EOT) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between PI24, pin 02 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t131.

G258127t131 : CHECK THE SENSOR GROUND AT THE A/C PRESSURE SENSOR
1. Disconnect the A/C pressure sensor electrical connector, EC11.
2. Reconnect the ECM electrical connector, PI01.
3. Measure the resistance between EC11, pin 01 (BG) and GROUND.

- Is the resistance greater than 5 Ohms?

->YES
GO to Pinpoint Test G258127t132.

->NO
Check for DTCs relating to individual sensors. Carry out pinpoint tests for sensors indicated.

G258127t132 : CHECK THE A/C PRESSURE SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, PI01.
2. Measure the resistance between EC11, pin 02 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
Check for DTCs relating to individual sensors. Carry out pinpoint tests for sensors indicated.
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