Dtcs P2111 to P2311: Other Dodge Nitro I

Monitor Conditions

1. When Monitored: Ignition on and battery voltage greater than 10 volts.

Set Conditions

1. Set Condition: Just after key on, the throttle is opened and closed to test the system. If the TP Sensor does not return to Limp Home Position at the end of this test, this DTC will set. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Possible Causes

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 432

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Scheme 435

Scheme 436

1. ACTIVE DTC NOTE: Maximum engine speed could be reduced while this fault is active, it just depends where the throttle gets stuck. Ignition on, engine not running. NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not return to the closed position this DTC sets. With a scan tool select View DTCs. NOTE: Diagnose any TP Sensor or 5-Volt Supply DTCs before continuing. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. THROTTLE PLATE STUCK OPEN Turn the ignition off. NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not return to the closed position this DTC sets. Remove the Air Cleaner Assembly from the Throttle Body. Check for any signs of a foreign material causing the Throttle to remain open. Using a scan tool, under System Tests, perform the ETC Throttle Follower Test. Have an assistant watch the throttle plate to verify it moves during the test. Does the Throttle Plate move? Yes Go To 3 . No Remove the debris if possible or replace the Throttle Body Assembly if signs of physical damage are present. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and perform the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
3. TP SIGNAL 1 AND TP SIGNAL 2 BOTH EQUAL 2.5 VOLTS With a scan tool, perform the ETC Throttle Follower test while monitoring both TP Sensor voltage readings. Are both TP Sensor readings stuck at 2.5 volts? Yes Check the TP Sensor Signal circuits for excessive resistance, being shorted to each other, or shorted to the Sensor Return circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Throttle Body harness connector. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform the diagnostics. Ignition on, engine not running. Measure the voltage on the (K124) ETC Motor (+) circuit at the appropriate terminal of special tool #8815. Is there any voltage present? Yes Repair the short to voltage on the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K124) ETC MOTOR (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (K124) ETC Motor (+) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. (K126) ETC MOTOR (-) CIRCUIT OPEN Measure the resistance of the (K126) ETC Motor (-) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the open in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO GROUND Measure the resistance between a known good ground and the (K124) ETC Motor (+) circuit at the appropriate terminal of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO GROUND Measure the resistance between a known good ground and the (K126) ETC Motor (-) circuit at the appropriate terminal of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on and battery voltage greater than 10 volts.

1. Set Condition: Just after key on, the throttle is opened and closed to test the system. If the TP Sensor does not return to Limp Home Position at the end of this test, this DTC will set. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 437

1. ACTIVE DTC NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not return to the closed position this DTC sets. Ignition on, engine not running. With a scan tool select View DTCs. NOTE: Diagnose any TP Sensor, Battery Voltage, and 5-Volt Supply DTCs before continuing. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. THROTTLE PLATE STUCK OPEN NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not open this DTC sets. Turn the ignition off. Remove the Air Cleaner Assembly from the Throttle Body. Check for any signs of a foreign material causing the Throttle to remain open. Using a scan tool under System Tests, perform the ETC Throttle Follower Test. Have an assistant watch the throttle plate to verify it moves during the test. Does the Throttle Plate move? Yes Go To 3 . No Remove the debris if possible or replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
3. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Throttle Body harness connector. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Ignition on, engine not running. Measure the voltage on the (K126) ETC Motor (-) circuit at the appropriate terminal of special tool #8815. Is there any voltage present? Yes Repair the short to voltage on the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K124) ETC MOTOR (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (K124) ETC Motor (+) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 5 . No Repair the open in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. (K126) ETC MOTOR (-) CIRCUIT OPEN Measure the resistance of the (K126) ETC Motor (-) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO GROUND Measure the resistance between a known good ground and the (K124) ETC Motor (+) circuit at the appropriate terminal of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO GROUND Measure the resistance between a known good ground and the (K126) ETC Motor (-) circuit at the appropriate terminal of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on. During in plant mode the APP Sensors need to be checked to make sure that idle and full pedal travel can be reached on both sensors. The test for P2115 is only enabled once test for P2166 has passed.

1. Set Condition: APPS No.1 has failed to achieve the required minimum value during In Plant testing. One trip fault and the code will set within 5 seconds. Engine will only idle. ETC light is illuminated.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on. During in plant mode the APP Sensors need to be checked to make sure that idle and full pedal travel can be reached on both sensors. The test for P2116 is only enabled once test for P2167 has passed.

1. Set Condition: APPS No.2 has failed to achieve the required minimum value during In Plant testing. One trip fault and the code will be stored within 5 seconds. Engine will only idle. ETC light is illuminated.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: With the ignition on and the ETC Motor is not in Limp Home mode.

1. Set Condition: When the PCM detects an internal error or a short between the ETC Motor (-) and ETC Motor (+) circuits in the ETC Motor Driver. One trip fault. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 438

1. ACTIVE DTC NOTE: When this DTC is Active the engine speed, torque, and vehicle speed are limited to a Limp in mode. NOTE: If the P2118 is intermittent, it is possible that the controller is overheating in extreme hot temperatures, and this is considered a normal protection operation. No repair is necessary. NOTE: If P2072 is also set, this indicates that the cold weather ice blockage routine has run. No repair action is required. Ignition on, engine not running. With a scan tool, select View DTCs. Look closely at the temperatures at which this DTC set. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. THROTTLE PLATE INSPECTION Turn the ignition off. Remove the Air Cleaner Assembly from the Throttle Body. Check for any signs of a foreign material (ice or dirt) on the Throttle Plate or in the bore causing the Throttle Plate to stick. Were any signs of foreign material or scoring of the throttle plate or bore found? Yes Remove the debris if possible or replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Throttle Body harness connector. Disconnect the C2 PCM harness connector. Ignition on, engine not running. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the voltage on the (K124) ETC Motor (+) circuit at the appropriate terminal of special tool #8815. Is there any voltage present? Yes Repair the short to voltage on the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO VOLTAGE Measure the voltage on the (K126) ETC Motor (-) circuit at the appropriate terminal of special tool #8815. Is there any voltage present? Yes Repair the short to voltage in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT Turn the ignition off. Measure the resistance between the (K124) ETC Motor (+) circuit and the (K126) ETC Motor (-) circuit at the appropriate terminals of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to between the (K124) ETC Motor (+) circuit and the (K126) ETC MOTOR (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K124) ETC MOTOR (+) CIRCUIT OPEN Measure the resistance of the (K124) ETC Motor (+) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the open in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K124) ETC Motor (+) circuit between the appropriate terminals of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. (K126) ETC MOTOR (-) CIRCUIT OPEN Measure the resistance of the (K126) ETC Motor (-) circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 9 . No Repair the open in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K126) ETC Motor (-) circuit between the appropriate terminals of special tool #8815. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K126) ETC Motor (-) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 .
10. ETC MOTOR NOTE: Take the following measurement using special tool #8815 to avoid possible damage to the Throttle Body harness connector. Connect the Throttle Body harness connector. Measure the resistance of the ETC Motor between the (K124) ETC Motor (+) circuit and the (K126) ETC Motor (-) circuit at the appropriate terminals of special tool #8815. Is the resistance between 2.5 and 25 ohms at closed throttle? Yes Go To 11 . No Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. If OK, replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
11. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 439

1. When Monitored: With the ignition on and no other APPS No.1 DTCs present.

1. Set Condition: When the APP Sensor No.1 voltage is too low. Engine will additionally idle if the brake pedal is pressed or has failed. Acceleration rate and Engine output are limited. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 440

Scheme 441

Scheme 442

Scheme 443

Scheme 444

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Scheme 446

Scheme 447

1. ACTIVE DTC Start the engine and allow it to reach normal operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test. NOTE: If you are viewing data recorder information or Freeze Frame data the APP Sensor No. 2 is pulled low by the PCM as part of its system testing. This test happens every 320 milliseconds and may not show up on the scan tool but may show up on a data recorder or lab scope. It is acceptable to see the voltage close to zero with a normal sensor when using a data recorder/lab scope. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Go To 11 .
2. (K855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the APP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K855) 5-volt Supply circuit in the APP Sensor harness connector. Is the voltage between 4.5 and 5.2 volts? Yes Go To 3 . No Go To 8 .
3. (K23) APP SIGNAL 1 CIRCUIT OPEN Turn the ignition off. Disconnect the C3 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K23) APP Signal 1 circuit from the APP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 4 . No Repair the open in the (K23) APP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
4. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K23) APP Signal 1 circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K23) APP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (K167) APP SENSOR GROUND 1 CIRCUIT Measure the resistance between the (K23) APP Signal 1 circuit and the (K167) APP Sensor Ground 1 circuit at the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K167) APP Sensor Ground 1 circuit and the (K23) APP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (K400) APP SENSOR GROUND 2 CIRCUIT Measure the resistance between the (K23) APP Signal 1 circuit and the (K400) APP Sensor Ground 2 circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K400) APP Sensor Ground 2 circuit and the (K23) APP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. ACCELERATOR PEDAL POSITION SENSOR Connect the C3 PCM harness connector. Ignition on, engine not running. Connect a jumper wire between the (K855) 5-volt Supply circuit and the (K23) APP Signal 1 circuit in the Sensor harness connector. With a scan tool, monitor the APP Sensor No.1 voltage. NOTE: The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the jumper wire installed. Does the scan tool display the voltage as described above? Yes Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 . NOTE: Remove the jumper wire before continuing.
8. (K855) 5-VOLT SUPPLY CIRCUIT OPEN Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K855) 5-volt Supply circuit from the Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 9 . No Repair the open in the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. (K855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K855) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 .
10. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
11. APP SENSOR SWEEP Ignition on, engine not running. With a scan tool, monitor the APP Sensor No.1 voltage. Slowly press the Accelerator pedal down. Does voltage start at approximately 0.45 of a volt and go above 4.6 volts with a smooth transition? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: With the ignition on and no other APPS No.1 DTCs present.

1. Set Condition: When APP Sensor No.1 voltage is too high. Engine will additionally idle if the brake pedal is pressed or has failed. Acceleration rate and Engine output are limited. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 448

Scheme 449

Scheme 450

Scheme 451

1. ACTIVE DTC Start the engine and allow it to reach normal operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test. NOTE: If you are viewing data recorder information or Freeze Frame data the APP Sensor No. 2 is pulled low by the PCM as part of its system testing. This test happens every 320 milliseconds and may not show up on the scan tool but may show up on a data recorder or lab scope. It is acceptable to see the voltage close to zero with a normal sensor when using a data recorder/lab scope. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Go To 8 .
2. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C1, C2, and C3 PCM harness connectors. Disconnect the APP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K23) APP Signal 1 circuit in the APP Sensor harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K23) APP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (K855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Measure the resistance between the (K23) APP Signal 1 circuit and the (K855) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K23) APP Signal 1 circuit and the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (K857) 5-VOLT SUPPLY CIRCUIT Measure the resistance between the (K23) APP Signal 1 circuit and the (K857) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K23) APP Signal 1 circuit and the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K167) APP SENSOR GROUND 1 CIRCUIT OPEN CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K167) APP Sensor Ground 1 circuit from the APP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K167) APP Sensor Ground 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. ACCELERATOR PEDAL POSITION SENSOR Connect the PCM harness connectors. Ignition on, engine not running. With a scan tool, monitor the APP Sensor 1 voltage. Is the voltage above 0 volts? Yes Go To 7 . No Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. APP SENSOR NO.1 SWEEP Ignition on, engine not running. With a scan tool, monitor the Accelerator Pedal Position Sensor voltage. Slowly press the Accelerator Pedal down. Does voltage start at approximately 0.45 of a volt and go above 4.6 volts with a smooth transition? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: With the ignition on and no other APPS No.2 DTCs present.

1. Set Condition: When the APP Sensor No.2 voltage is too low. Engine will only idle if the Brake pedal is Pressed or has failed. Acceleration rate and Engine output are limited. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 452

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Scheme 454

Scheme 455

Scheme 456

Scheme 457

Scheme 458

Scheme 459

1. ACTIVE DTC Start the engine and allow it to reach normal operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test. NOTE: If you are viewing data recorder information or Freeze Frame data the APP Sensor No. 2 is pulled low by the PCM as part of its system testing. This test happens every 320 milliseconds and may not show up on the scan tool but may show up on a data recorder or lab scope. It is acceptable to see the voltage close to zero with a normal sensor when using a data recorder/lab scope. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Go To 11 .
2. (K857) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the APP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K857) 5-volt Supply circuit in the APP Sensor harness connector. Is the voltage between 4.5 and 5.2 volts? Yes Go To 3 . No Go To 8 .
3. (K29) APP SIGNAL 2 CIRCUIT OPEN Turn the ignition off. Disconnect the C3 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K29) APP Signal 2 circuit from the APP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 4 . No Repair the open in the (K29) APP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
4. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K29) APP Signal 2 circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K29) APP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO THE (K400) APP SENSOR GROUND 2 CIRCUIT Measure the resistance between the (K29) APP Signal 2 circuit and the (K400) APP Sensor Ground 2 circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K400) APP Sensor Ground 2 circuit and the (K29) APP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO THE (K167) APP SENSOR GROUND 1 CIRCUIT Measure the resistance between the (K29) APP Signal 2 circuit and the (K167) APP Sensor Ground 1 circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (K167) APP Sensor Ground 1 circuit and the (K29) APP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. ACCELERATOR PEDAL POSITION SENSOR Connect the PCM harness connectors. Ignition on, engine not running. Connect a jumper wire between the (K857) 5-volt Supply circuit and the (K29) APP Signal 2 circuit in the Sensor harness connector. With a scan tool, monitor the APP Sensor 2 voltage. NOTE: The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the jumper wire installed. Does the scan tool display the voltage as described above? Yes Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 . NOTE: Remove the jumper wire before continuing.
8. (K857) 5-VOLT SUPPLY CIRCUIT OPEN Turn the ignition off. Disconnect the C1 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K857) 5-volt Supply circuit from the Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 9 . No Repair the open in the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. (K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K857) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 .
10. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
11. APP SENSOR SWEEP Ignition on, engine not running. With a scan tool, monitor the APP Sensor No.2 voltage. Slowly press the Accelerator pedal down. Does voltage start at approximately 0.22 of a volt and go above 2.31 volts with a smooth transition? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: With the ignition on and no other APPS No.2 DTCs present.

1. Set Condition: When APP Sensor No.2 voltage is too high. Idle is additionally forced any time the brake is applied or failed. Acceleration rate and Engine output are limited. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 460

Scheme 461

Scheme 462

Scheme 463

1. ACTIVE DTC Start the engine and allow it to reach normal operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test. NOTE: If you are viewing data recorder information or Freeze Frame data the APP Sensor No. 2 is pulled low by the PCM as part of its system testing. This test happens every 320 milliseconds and may not show up on the scan tool but may show up on a data recorder or lab scope. It is acceptable to see the voltage close to zero with a normal sensor when using a data recorder/lab scope. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Go To 8 .
2. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C1, C2, and C3 PCM harness connectors. Disconnect the APP Sensor harness connector. Ignition on, engine not running. Measure the voltage on the (K29) APP Signal 2 circuit in the APP Sensor harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K29) APP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO THE (K857) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Measure the resistance between the (K29) APP Signal 2 circuit and the (K857) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 10 ohms? Yes Repair the short between the (K29) APP Signal 2 circuit and the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K29) APP SIGNAL 2 CIRCUIT SHORTED TO THE (K855) 5-VOLT SUPPLY CIRCUIT Measure the resistance between the (K29) APP Signal 2 circuit and the (K855) 5-volt Supply circuit in the APP Sensor harness connector. Is the resistance below 10 ohms? Yes Repair the short between the (K29) APP Signal 2 circuit and the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K400) APP SENSOR GROUND 2 CIRCUIT OPEN CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K400) APP Sensor Ground 2 circuit from the APP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K400) APP Sensor Ground 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. ACCELERATOR PEDAL POSITION SENSOR Connect the PCM harness connectors. Ignition on, engine not running. With a scan tool, monitor the Accelerator Pedal Position Sensor voltage. Is the voltage above 0 volts? Yes Go To 7 . No Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. If OK, replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the APPS and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. APP SENSOR NO.2 SWEEP Ignition on, engine not running. With a scan tool, monitor the Accelerator Pedal Position Sensor voltage. Slowly press the Accelerator Pedal down. Does voltage start at approximately 0.22 of a volt and go above 2.31 volts with a smooth transition? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Replace the APP Sensor Assembly per Service Information. After installation is complete, use a scan tool and select the ETC RELEARN function to relearn the APPS values. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: With the ignition on and no other DTCs present for TP Sensor No.1 or No.2.

1. Set Condition: PCM recognizes TP Sensors No.1 and No.2 are not coherent. One trip fault and the code will set within 5 seconds. ETC light is illuminated.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 464

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Scheme 470

Scheme 471

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Scheme 473

Scheme 474

Scheme 475

1. ACTIVE DTC NOTE: The throttle plate and linkage should be free from binding and carbon build up. NOTE: Make sure the throttle plate is at the idle position. Ignition on, engine not running. NOTE: Inspect the engine for vacuum leaks. With a scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Go To 14 .
2. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C2 PCM harness connector. Disconnect the Throttle Body harness connector. Ignition on, engine not running. Measure the voltage on the (K22) TP Signal 1 circuit in the Throttle Body harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE Measure the voltage on the (K122) TP Signal 2 circuit in the Throttle Body harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K122) TP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. THROTTLE POSITION SENSOR Turn the ignition off. Connect the C2 PCM harness connector. Ignition on, engine not running. With a scan tool, monitor the TP Signal 1 and Signal 2 voltage. Connect a jumper wire between the (K922) TP Sensor Ground circuit and the (K22) TP Signal 1 circuit. TP Sensor No.1 voltage should change from approximately 4.5 volts to 0.5 of a volt? For TP Sensor No.2, connect a jumper wire between (F855) 5-volt supply circuit and the (K122) TP Signal 2 circuit. TP Sensor No.2 voltage should change from approximately 0 volts to 5.0 volts? Is the voltage reading within the listed specification with the jumper wire installed? Yes Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. If OK, replace the Throttle Body in accordance with Service Information. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 . NOTE: Remove the jumper wire before continuing.
5. EXCESSIVE RESISTANCE IN THE (K22) TP SIGNAL 1 CIRCUIT Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K22) TP Signal 1 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms for each circuit? Yes Go To 6 . No Repair the excessive resistance in the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. EXCESSIVE RESISTANCE IN THE (K122) TP SIGNAL 2 CIRCUIT Measure the resistance of the (K122) TP Signal 2 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms for each circuit? Yes Go To 7 . No Repair the excessive resistance in the (K122) TP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K22) TP Signal 1 circuit at the Throttle Body harness connector. Is the resistance below 100 ohms for each circuit? Yes Repair the short to ground in the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K122) TP Signal 2 circuit at the Throttle Body harness connector. Is the resistance below 100 ohms for each circuit? Yes Repair the short to ground in the (K122) TP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. EXCESSIVE RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (F855) 5-volt Supply circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 10 . No Repair the excessive resistance in the (F855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
10. (F855) 5-VOLT SUPPLY SHORTED TO GROUND Measure the resistance between ground and the (F855) 5-volt Supply circuit at the Throttle Body harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (F855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 11 .
11. EXCESSIVE RESISTANCE IN THE (K922) TP SENSOR GROUND CIRCUIT CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K922) TP Sensor Ground circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 12 . No Repair the excessive resistance in the (K922) TP Sensor Ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
12. (K22) TP SIGNAL 1 SHORTED TO THE (K122) TP SIGNAL 2 Measure the resistance between the (K22) TP Signal 1 circuit and the (K122) TP Signal 2 circuit at the Throttle Body harness connector. Is the resistance below 5.0 ohms? Yes Repair the short between the (K122) TP Signal 2 circuit and the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 13 .
13. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
14. THROTTLE FOLLOWER TEST Ignition on, engine not running. With a scan tool, perform the ETC Throttle Follower Test and monitor the TP Sensor No.1 or No.2 voltage. Slowly press the throttle pedal down. The voltage for TP Sensor No.1 should start at approximately 0.7 of a volt and increase to approximately 4.3 volts. The voltage for TP Sensor No.2 should start at approximately 4.3 volts and decrease to approximately 0.7 of a volt. Is the voltage within the range of the listed specification for the appropriate Sensor? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Verify that there is good pin to terminal contact in the Throttle Body and the Powertrain Control Module connectors. If OK, replace the Throttle Body in accordance with Service Information. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: With the ignition on and no APPS No.1 and APPS No.2 DTC present.

1. Set Condition: APPS values No.1 and No.2 are not coherent. Idle is additionally forced when the brake pedal is pressed or failed. Acceleration rate and Engine output are limited. One trip fault and the code will set within 5 seconds. ETC light is flashing.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on.

1. Set Condition: PCM recognizes Vehicle speed input No.2 erratic or high. VSS No.2 is based on the average of the Front Wheel Speeds. One trip fault and the code will set within 5 seconds. No MIL and No ETC light. Cruise is disabled.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on. During in plant mode the APP Sensors need to be checked to make sure that idle and full pedal travel can be reached on both sensors.

1. Set Condition: APPS No.1 has failed to achieve the required maximum value during In Plant testing. One trip fault and the code will set within 5 seconds. Engine will only idle. ETC light will illuminate.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on. During in plant mode the APP Sensors need to be checked to make sure that idle and full pedal travel can be reached on both sensors.

1. Set Condition: APPS No.2 has failed to achieve the required maximum value during In Plant testing. One trip fault and the code will set within 5 seconds. Engine will only idle. ETC light will illuminate.

1. When Monitored: Ignition on and engine running with no MAP Sensor DTCs.

1. Set Condition: A large vacuum leak has been detected or both of the TP Sensors have failed based on their position being 2.5 volts and the calculated MAP value is less than the actual MAP minus an Offset value. One trip fault and the code will set within 5 seconds. ETC light will flash.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 476

Scheme 477

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Scheme 479

Scheme 480

Scheme 481

1. ACTIVE DTC NOTE: The most likely cause of this DTC is a vacuum leak. NOTE: This fault code could be present if any Cam/Crank DTCs are set. No repair is necessary for P2172 if any Cam or Crank DTCs are set. NOTE: Diagnose any 5-Volt Supply, TP Sensor, Fuel System Lean or Rich, or MAP Sensor DTCs before continuing. NOTE: The throttle plate should be free from binding and carbon build up. Ignition on, engine not running. With a scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. VACUUM LEAK NOTE: This code is enabled on engines with a plastic intake manifold and is intended to limit the maximum engine speed if a large crack occurs. NOTE: A large vacuum leak is most likely the cause of this DTC. Inspect the Intake Manifold and Throttle body for leaks and cracks. Inspect the Power Brake Booster for any vacuum leaks. Inspect the PCV system for proper operation or any vacuum leaks. Inspect the MAP Sensor for proper installation. Were any vacuum leaks found? Yes Repair the vacuum leak as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. MAP SENSOR OPERATION Start the engine. With a scan tool, monitor the MAP Sensor voltage. Snap the Accelerator pedal. Does the MAP Sensor voltage vary from below 2.0 volts at idle to above 3.5 volts at Wide Open Throttle? Yes Go To 4 . No Go To 13 .
4. TP SENSOR OPERATION Ignition on, engine not running. With a scan tool, perform the ETC Throttle Follower Test. TP Sensor No.1 should start at approximately 0.8 of a volt and increase to 4.2 volts. TP Sensor No.2 should start at approximately 4.2 volts and decrease to 0.8 of a volt. Is the voltage transition smooth between the appropriate values? Yes Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure. No Go To 5 .
5. RESISTANCE IN THE (K855) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the Throttle Body harness connector. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K855) 5-volt Supply circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance above 100 ohms? Yes Go To 6 . No Repair the excessive resistance in the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. (K855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and (K855) 5-volt Supply circuit at the Throttle Body harness connector. Is the resistance above 100 ohms? Yes Go To 7 . No Repair the short to ground in the (K855) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. TP SENSOR Connect the C2 PCM harness connector. Ignition on, engine not running. With a scan tool, monitor the TP Sensor voltage. Connect a jumper wire between the (K22) TP Signal 1 circuit and the (K922) TP Return circuit in the Throttle Body harness connector. TP Sensor No.1 voltage should start at approximately 4.8 volts and decrease to 0.2 of a volt. Connect a jumper wire between the (K122) TP Signal 2 circuit and the (K855) 5-volt Supply circuit in the Throttle Body harness connector. TP Sensor No.2 voltage should start at approximately 0 volts and increase to 4.8 to 5.2 volts. Does the TP Sensor voltage change to the appropriate voltage with the jumper wire installed? Yes Disconnect the Battery before replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. RESISTANCE IN THE (K22) TP SIGNAL 1 CIRCUIT Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance of the (K22) TP Signal 1 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 9 . No Repair the excessive resistance in the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. RESISTANCE IN THE (K122) TP SIGNAL 2 CIRCUIT Measure the resistance of the (K122) TP Signal 2 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 10 . No Repair the excessive resistance in the (K122) TP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
10. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K22) TP Signal 1 circuit at the Throttle Body harness connector. Is the resistance above 100 ohms? Yes Go To 11 . No Repair the short to ground in the (K22) TP Signal 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
11. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K122) TP Signal 2 circuit at the Throttle Body harness connector. Is the resistance above 100 ohms? Yes Go To 12 . No Repair the short to ground in the (K122) TP Signal 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
12. RESISTANCE IN THE (K922) TP RETURN CIRCUIT Measure the resistance of the (K922) TP Return circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 19 . No Repair the excessive resistance in the (K922) TP Return circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
13. RESISTANCE IN THE (K857) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the MAP Sensor harness connector. Disconnect the C1 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K857) 5-volt Supply circuit from the MAP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 14 . No Repair the excessive resistance in the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
14. (K857) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K857) 5-volt Supply circuit in the MAP Sensor harness connector. Is the resistance above 100k ohms? Yes Go To 15 . No Repair the short to ground in the (K857) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
15. MAP SENSOR Connect the C1 PCM harness connector. Ignition on, engine not running. With a scan tool, monitor the MAP Sensor voltage. Connect a jumper wire between the (K1) MAP Signal circuit and the (K900) Sensor ground circuit in the MAP Sensor harness connector. Cycle the ignition switch from off to on. With a scan tool, monitor the MAP Sensor voltage. Does the scan tool display MAP voltage from approximately 4.9 volts to below 0.5 volt with the jumper wire installed? Yes Replace the MAP Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 16 . NOTE: Remove the jumper wire before continuing.
16. RESISTANCE IN THE (K1) MAP SIGNAL CIRCUIT Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance of the (K1) MAP Signal circuit from the MAP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 17 . No Repair the excessive resistance in the (K1) MAP Signal circuit Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
17. (K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K1) MAP Signal circuit in the MAP Sensor harness connector. Is the resistance above 100k ohms? Yes Go To 18 . No Repair the short to ground in the (K1) MAP Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
18. RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT Measure the resistance of the (K900) Sensor ground circuit from the MAP Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 19 . No Repair the excessive resistance in the (K900) Sensor ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
19. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP Sensor, Throttle Body, and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the MAP Sensor, Throttle Body, and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on and engine running with no MAP Sensor DTCs.

1. Set Condition: A large vacuum leak has been detected or both of the TP Sensors have failed based on their position being 2.5 volts and the calculated MAP value is less than the Gas Flow Adaptation value is too high. One trip fault the code will set within 5 seconds. ETC light will flash.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on and engine running with no MAP Sensor DTCs.

1. Set Condition: PCM calculated MAP value is greater than actual MAP value plus an offset value. One trip fault. Three good trips to turn of the mil. MIL is on and the ETC light will flash.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on and engine running with no MAP Sensor DTCs.

1. Set Condition: PCM calculated MAP value is greater than actual MAP value plus an offset value. One trip fault and the code will set within 5 seconds. Three good trips to turn of the mil. MIL is on and the ETC light will flash.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on, Engine running, and no ECT DTCs present.

1. Set Condition: PCM recognizes that the ECT has failed its self coherence test. The coolant temp should only change at a certain rate, if this rate is too slow or too fast this fault will set. Two trip fault. Three good trips to clear MIL. The MIL and ETC light will illuminate.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 482

Scheme 483

Scheme 484

Scheme 485

Scheme 486

Scheme 487

1. ACTIVE DTC Ignition on, engine not running. NOTE: If this code sets during extreme ambient temperatures, improper installation of a block heater could be the cause of this DTC. With a scan tool, read DTCs. Diagnose all other ECT and Cooling System codes before continuing. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. LOW COOLANT LEVEL NOTE: If a Engine Coolant Temperature (ECT) DTC is set along with this code, diagnose the ECT DTC first. NOTE: Inspect the ECT terminals and related PCM terminals. Ensure the terminals are free from corrosion and damage. NOTE: The best way to diagnose this DTC is to allow the vehicle to sit overnight outside in order to have a totally cold soaked engine. NOTE: Extremely cold outside ambient temperatures may have caused this DTC to set. NOTE: Need to make sure that no Cooling System DTCs are set or changes that would make the warm up much slower or much faster: broken water pump can set this, addition of aftermarket auxiliary cooler can set this DTC. WARNING: Never open the cooling system when the engine is hot. The system is under pressure. Failure to follow these instructions can result in personal injury or death. Allow the engine to cool before opening the cooling system. Inspect the coolant system for proper level and condition. Is the coolant level and condition OK? Yes Go To 3 . No Inspect the vehicle for a coolant leak and add the necessary amount of coolant. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
3. THERMOSTAT NOTE: This test works best if performed on a cold engine (cold soak). Ignition on, engine not running. With a scan tool, read the Eng Coolant Tmp Deg value. If the engine was allowed to sit overnight (cold soak), the temperature value should be a sensible value that is somewhere close to the ambient temperature. NOTE: If engine coolant temperature is above 82° C (180° F), allow the engine to cool until 65° C (150° F) is reached. Start the Engine. During engine warm-up monitor the Eng Coolant Tmp Deg value. The temp deg value change should be a smooth transition from start up to normal operating temp 82° C (180° F). Also monitor the actual coolant temperature with a thermometer. NOTE: As the engine warms up to operating temperature, the actual coolant temperature (thermometer reading) and the Eng Coolant Tmp Deg on the scan tool should stay relatively close to each other. Using the appropriate service information, determine the proper opening temperature of the thermostat. Did the thermostat open at the proper temperature? Yes Go To 4 . No Replace the thermostat. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
4. ECT SENSOR Connect a jumper between the (K2) ECT Signal circuit and the (K900) Sensor ground circuit in the ECT Sensor harness connector. Turn the ignition off. Disconnect the ECT Sensor harness connector. With a scan tool, read the ECT voltage. NOTE: The sensor voltage should be approximately 0.0 volts (plus or minus.1 volt) with the jumper wire in place. Does the scan tool display the voltage as described above? Yes Verify that there is good pin to terminal contact in the ECT Sensor and Powertrain Control Module connectors. If OK, replace the ECT Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K2) ECT SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C2 PCM harness connector. Ignition on, engine not running. Measure the voltage on the (K2) ECT Signal circuit in the ECT Sensor harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K2) ECT Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K2) ECT SIGNAL CIRCUIT OPEN Turn the ignition off. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K2) ECT Signal circuit from the ECT Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the open in the (K2) ECT Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K900) SENSOR GROUND CIRCUIT OPEN Measure the resistance of the (K900) Sensor ground circuit from the ECT Sensor harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 8 . No Repair the open in the (K900) Sensor ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. (K2) ECT SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K2) ECT Signal circuit in the ECT Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K2) ECT Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. (K2) ECT SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT Measure the resistance between the (K2) ECT Signal circuit and the (K900) Sensor ground circuit in the ECT Sensor harness connector. Is the resistance below 5.0 ohms? Yes Repair the short between the (K900) Sensor ground and the (K2) ECT Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 .
10. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the ECT Sensor and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the ECT Sensor and Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 488

1. When Monitored: With the engine running, vehicle speed above 96 kph (60 mph), throttle open for a minimum of 120 seconds, ECT greater than 70° C (158° F), catalytic converter temperature greater than 600° C (1112° F), and downstream oxygen sensor in a rich state. During a decel fuel shutoff event, the downstream oxygen sensor should switch from rich to lean within a specific time.

1. Set Condition: The PCM monitors the downstream O2 sensor. If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail. Two trip fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: With the engine running, vehicle speed above 96 kph (60 mph), throttle open for a minimum of 120 seconds, ECT greater than 70 C (158 F), catalytic converter temperature greater than 600 C (1112 F), and downstream oxygen sensor in a rich state. During a decel fuel shutoff event, the downstream oxygen sensor should switch from rich to lean within a specific time.

1. Set Condition: The PCM monitors the downstream O2 sensor. If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail. Two trip fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on. No Break or APPS faults present.

1. Set Condition: The PCM recognizes a brake application following the APPS showing a fixed pedal opening. Temporary or permanent. Internally the PCM will reduce throttle opening below driver demand. One trip fault and the code will be set within 5 seconds. ETC light will illuminate, the light will only stay illuminated while DTC is active.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Engine running and battery voltage greater than 10 volts.

1. Set Condition: If PCM detects that the secondary ignition burn time is incorrect, to short, or not present, an error is detected. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 489

Scheme 490

Scheme 491

Scheme 492

1. ACTIVE DTC Start the engine and allow it to reach operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. (K344) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Coil on Plug harness connector. Ignition on, engine not running. Using a 12-volt test light connected to ground, probe the (K344) ASD Relay Output circuit in the Coil on Plug harness connector. NOTE: Make sure the test light is probing the circuit before actuating the Coil or a DTC may set and not allow the actuation. With a scan tool, actuate the ASD Relay. Does the test light illuminate brightly? Yes Go To 3 . No Repair the open or short to ground in the (K344) ASD Relay Output circuit between the PDC and Coil harness connector. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . NOTE: Stop All Actuations.
3. IGNITION COIL WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. Using a 12-volt test light connected to a 12-volt source, probe the (K86) Coil Control 1 circuit. Crank the engine for 5 seconds while observing the test light. What is the condition of the test light while cranking the engine? Brightly blinking. Replace the Coil on plug. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . ON constantly. Go To 4 . OFF constantly. Go To 5 .
4. (K86) COIL CONTROL 1 CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K86) Coil Control 1 circuit in the Coil on Plug harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K86) Coil Control 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
5. (K86) COIL CONTROL 1 CIRCUIT OPEN Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K86) Coil Control 1 circuit from the Coil on Plug harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K86) Coil Control 1 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 493

1. When Monitored: Engine running and battery voltage greater than 10 volts.

1. Set Condition: If PCM detects that the secondary ignition burn time is incorrect, to short, or not present, an error is detected. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 494

Scheme 495

Scheme 496

1. ACTIVE DTC Start the engine and allow it to reach operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. (K344) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Coil on Plug harness connector. Ignition on, engine not running. With a scan tool, actuate the ASD Relay. Using a 12-volt test light connected to ground, probe the (K344) ASD Relay Output circuit in the Coil on Plug harness connector. Does the test light illuminate brightly? Yes Go To 3 . No Repair the open or short to ground in the (K344) ASD Relay Output circuit between the PDC and Coil harness connector. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . NOTE: Stop All Actuations.
3. IGNITION COIL WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. Using a 12-volt test light connected to a 12-volt source, probe the (K85) Coil Control 2 circuit. Crank the engine for 5 seconds while observing the test light. What is the state of the test light while cranking the engine? Brightly blinking. Replace the Coil on plug. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . ON constantly. Go To 4 . OFF constantly. Go To 5 .
4. (K85) COIL CONTROL 2 CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K85) Coil Control 2 circuit in the Coil on Plug harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K85) Coil Control 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
5. (K85) COIL CONTROL 2 CIRCUIT OPEN Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K85) Coil Control 2 circuit from the Coil on Plug harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K85) Coil Control 2 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 497

1. When Monitored: Engine running and battery voltage greater than 10 volts.

1. Set Condition: If PCM detects that the secondary ignition burn time is incorrect, to short, or not present, an error is detected. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 498

Scheme 499

Scheme 500

1. ACTIVE DTC Start the engine and allow it to reach operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. (K344) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Coil on Plug harness connector. Ignition on, engine not running. With a scan tool, actuate the ASD Relay. Using a 12-volt test light connected to ground, probe the (K344) ASD Relay Output circuit in the Coil on Plug harness connector. Does the test light illuminate brightly? Yes Go To 3 . No Repair the open or short to ground in the (K344) ASD Relay Output circuit between the PDC and Coil harness connector. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . NOTE: Stop All Actuations.
3. IGNITION COIL WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. Using a 12-volt test light connected to a 12-volt source, probe the (K93) Coil Control 3 circuit. Crank the engine for 5 seconds while observing the test light. What is the state of the test light while cranking the engine? Brightly blinking. Replace the Coil on plug. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . ON constantly. Go To 4 . OFF constantly. Go To 5 .
4. (K93) COIL CONTROL 3 CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K93) Coil Control 3 circuit in the Coil on Plug harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K93) Coil Control 3 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
5. (K93) COIL CONTROL 3 CIRCUIT OPEN Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K93) Coil Control 3 circuit from the Coil on Plug harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K93) Coil Control 3 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 501

1. When Monitored: Engine running and battery voltage greater than 10 volts.

1. Set Condition: If PCM detects that the secondary ignition burn time is incorrect, to short, or not present, an error is detected. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 502

Scheme 503

Scheme 504

1. ACTIVE DTC Start the engine and allow it to reach operating temperature. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. With the scan tool, select View DTCs. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. (K344) ASD RELAY OUTPUT CIRCUIT Turn the ignition off. Disconnect the Coil on Plug harness connector. Ignition on, engine not running. With a scan tool, actuate the ASD Relay. Using a 12-volt test light connected to ground, probe the (K344) ASD Relay Output circuit in the Coil on Plug harness connector. Does the test light illuminate brightly? Yes Go To 3 . No Repair the open or short to ground in the (K344) ASD Relay Output circuit between the PDC and Coil harness connector. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . NOTE: Stop All Actuations.
3. IGNITION COIL WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. Using a 12-volt test light connected to a 12-volt source, probe the (K15) Coil Control 4 circuit. Crank the engine for 5 seconds while observing the test light. What is the state of the test light while cranking the engine? Brightly blinking. Replace the Coil on plug. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . ON constantly. Go To 4 . OFF constantly. Go To 5 .
4. (K15) COIL CONTROL 4 CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between ground and the (K15) Coil Control 4 circuit in the Coil on Plug harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K15) Coil Control 4 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
5. (K15) COIL CONTROL 4 CIRCUIT OPEN Turn the ignition off. Disconnect the C2 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (K15) Coil Control 4 circuit from the Coil on Plug harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K15) Coil Control 4 circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Ignition Coil and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were there any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .