Dtcs P0420 to P0563: Other Dodge Nitro I

Monitor Conditions

1. When Monitored: The monitor will run at between 1400 and 2300 RPM. It also runs between 40 and 70 kPA.

Set Conditions

1. Set Condition: If the final State of Change index is within the calibrated fail threshold. Two trip fault. Three good trips to turn off the MIL.

Possible Causes

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

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1. ACTIVE DTC NOTE: A new rear O2 Sensor along with an aging front O2 Sensor may cause the DTC to set. Review the repair history of the vehicle before continuing. NOTE: If an O2 Sensor DTC set along with the Catalytic Converter Efficiency DTC diagnose the O2 Sensor DTC(s) before continuing. NOTE: Check for contaminants that may have damaged the O2 Sensor and Catalytic Converter: contaminated fuel, unapproved silicone, oil and coolant, repair necessary. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. VISUALLY INSPECT CATALYTIC CONVERTER Inspect the Catalytic Converter for the following damage. Damage Catalytic Converter, dents or holes. Severe discoloration caused by overheating the Catalytic Converter. Catalytic Converter broke internally. Inspect both ends of the converter, inlet and outlet. Leaking Catalytic Converter. Were any problems found? Yes Replace the Catalytic Converter. Repair the condition that may have caused the failure. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K902) O2 RETURN UPSTREAM CIRCUIT VOLTAGE CHECK Turn the ignition off. Disconnect the 1/1 O2 Sensor harness connector. Turn the ignition on. Measure the voltage on the (K902) O2 Return Upstream circuit in the O2 Sensor harness connector. Is the voltage at 2.5 volts? Yes Go To 4 . No Go To 5 .
4. (K904) O2 RETURN DOWNSTREAM CIRCUIT VOLTAGE CHECK Turn the ignition off. Disconnect the 1/2 O2 Sensor harness connector. Turn the ignition on. Measure the voltage on the (K904) O2 Return Downstream circuit in the O2 Sensor harness connector. Is the voltage at 2.5 volts? Yes Go To 10 . No Go To 7 .
5. (K902) O2 RETURN UPSTREAM CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C1 and C2 PCM harness connectors. Measure the resistance between ground and the (K902) O2 Return Upstream circuit in the 1/1 O2 Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K902) O2 Return Upstream circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K902) O2 RETURN UPSTREAM CIRCUIT OPEN Measure the resistance of the (K902) O2 Return Upstream circuit from the 1/1 O2 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 (K902) O2 Return Upstream circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the 1/2 O2 harness connector. Measure the resistance between ground and the (K904) O2 Return Downstream circuit in the 1/2 O2 Sensor harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K904) O2 Return Downstream circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. (K904) O2 RETURN DOWNSTREAM CIRCUIT OPEN Measure the resistance of the (K904) O2 Return Downstream circuit from the 1/2 O2 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 (K904) O2 Return Downstream circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the 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 Sensor 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) .
10. CHECKING THE EXHAUST SYSTEM FOR LEAKS Turn the ignition off. Raise the vehicle in accordance with the Service Information. WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a high level after a short period of engine operating time. Connect Exhaust Cone #8404-EC or #8404-EC to Air Pressure Regulator (with hose) #W-18-MIL-1146AS. CAUTION: The air pressure must not exceed 27.6 kPa (4 psi), otherwise engine damage can occur. Attach shop air to the air pressure regulator. Adjust the Air Pressure Regulator to 27.6 kPa (4 psi) Insert the exhaust cone into the vehicle tail pipe. If the vehicle is equipped with dual exhaust. Use the #8404-ECT with equipped attached plug, plug one side of the dual exhaust pipe. Pressurize the other as described above. Apply Mopar® Air Leak Detector PN# 05191804AA (or an equivalent leak finder liquid) to the following areas: - All welded joints from the exhaust manifold to 152.4 mm (6 inches) behind the downstream O2 sensor - O2 sensor seal points - O2 sensor boss welds - Flange/joint connection(s) - Exhaust manifold to cylinder head connection(s) - EGR solenoid gasket base and tube seal points (if equipped) Watch for the liquid/soapy water to bubble. Use the following definitions to help determine if system or component repair/replacement is necessary: Type 1 Leak is defined as a leak where very small foam like bubbles 1 mm (0.04 of an inch) or less appear. Any Type 1 or greater leaks found in welded joints, O2 sensor seal points or O2 sensor boss welds must be repaired or the component must be replaced. Type 2 Leak is defined as a leak where larger bubbles pea size, 8 mm (0.3 of an inch) or greater appear. Any Type 2 or greater leaks found in flange or joint connections, exhaust manifold to cylinder head connections, or EGR gasket and tube seal points must be repaired or the components must be replaced Leak Location Repair required if results at 4 psi reveal bubble size: Welded joints Type 1, 1 mm (0.04 of an inch) or greater O2 Sensor seal points Type 1, 1 mm (0.04 of an inch) or greater O2 Sensor boss welds Type 1, 1 mm (0.04 of an inch) or greater Flange / joint connections Type 2, 8 mm (0.3 of an inch) or greater Exhaust Manifold to cylinder head connections Type 2, 8 mm (0.3 of an inch) or greater EGR gasket and tube seal points Type 2, 8 mm (0.3 of an inch) or greater If a leak is found that matches the above definition, repair or replace the component as necessary. Once the repair is complete, repeat the procedure to verify that all leaks have been repaired. Were any exhaust leaks found? Yes Repair or replace the leaking exhaust parts as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 11 .
11. ENGINE MECHANICAL CONDITION Check the exhaust for excessive smoke caused by an internal problem in the engine. Is an engine mechanical condition present? Yes Repair the engine mechanical condition as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 12 .
12. AGING O2 SENSOR A new rear O2 Sensor along with an aging front O2 Sensor may cause the DTC to set. Review the vehicles repair history. Has the rear O2 Sensor been replaced without replacing the front O2 Sensor? Yes Replace the Front O2 Sensor as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 13 .
13. CATALYTIC CONVERTER If there are no possible cause remaining, view repair. Repair Replace the Catalytic Converter. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: The monitor will run at between 1400 and 2300 RPM. It also runs between 40 and 70 KPA.

1. Set Condition: If the final State of Change index is within the calibrated fail threshold. Two trip fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Engine running after a cold start with the difference between ECT and AAT is less than 10° C (19° F). Fuel Level between 12% and 88% full. Manifold vacuum greater than a calculated minimum value. Ambient Temperature between 4° C and 32° C (39° F and 89° F).

1. Set Condition: When the monitor conditions are met, the PCM will ramp in purge flow. If the PCM does not sense an ESM switch closure after a calculated amount of purge flow accumulation, an error is detected. Two Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

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1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION Ignition on, engine not running. With a scan tool, select View DTCs. Record the related Freeze Frame data if any DTC(s) are present. Whether or not any DTC(s) are active you will want to check the following items which may assist in repairing the customer's complaint successfully. Check the vehicle's repair history. If the vehicle has a repair history that pertains to the customer's current complaint, review the repair. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly. Check for any service bulletin(s) related to the customer's complaint or DTCs. If a service bulletin applies, follow the instructions per the service bulletin. Choose the following scenario that best applies. The service bulletin repaired the customer's complaint. Testing complete. A DTC is present, no service bulletins apply, or the service bulletin didn't repair the customer's complaint. Go To 2 .
2. ACTIVE DTC NOTE: Allow the vehicle to reach ambient temperature before continuing with this procedure. NOTE: A loose gas cap could have caused this DTC to set. Make sure the gas cap is tight and in good condition. NOTE: If the customer is experiencing an early fuel shut off during the fuel filling process along with P0440, P0441, and P0452 setting, you need to check for restrictions in the EVAP Purge tubes/hoses as well as the Fresh Air Filter before continuing. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 3 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
3. VISUAL AND PHYSICAL INSPECTION Turn the ignition off. Perform a visual and physical inspection of the entire Evaporative Emission system. Check for the following conditions: - Hoses disconnected or left off - Holes or cracks - Loose seal points - Evidence of damaged components - Incorrect routing of hoses and tubes - Fuel Cap left off or bad gasket seal Were any of the above conditions found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. EVAP VACUUM SUPPLY HOSE INSPECTION Carefully inspect the EVAP Purge Solenoid vacuum supply hose for proper routing. Check for a pinched or plugged hose from the throttle body or intake manifold to the Purge Solenoid. Make sure the vacuum port at the throttle body or intake manifold is free from any blockage. Were any problems found? Yes Repair the vacuum supply, hose/tube as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. EVAP PURGE SOLENOID NOTE: To continue testing you will need Miller Tool #8404 Evaporative Emission Leak Detector (EELD). WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases, Keep the test area well ventilated. Connect the red power lead of the EELD to the battery positive terminal and the black ground lead to battery negative terminal. Disconnect the vacuum hoses at the EVAP Purge Solenoid. Connect the SMOKE supply tip (black hose) to the "CAN" port on the EVAP Purge Solenoid. Set the smoke/air control switch to SMOKE. While still holding the remote smoke/air start button, check to see if smoke is exiting the purge valve. This indicates that there is a leak internal to the purge valve. NOTE: This is an optional method of checking the purge valve for leaks if the EELD is unavailable. Disconnect the Smoke supply tip from the vacuum supply hoses at the EVAP Purge Solenoid. Using a hand vacuum pump, apply 10 in Hg to the "CAN" side of the EVAP Purge Solenoid. Observe the vacuum gauge for at least 15 seconds. Is smoke visible from the EVAP Purge Solenoid or NOT hold a vacuum? Yes Replace the EVAP Purge Solenoid. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. ESIM SWITCH STATE Turn the ignition off. Connect the previously disconnected vacuum hose. Disconnect the EVAP System Monitor Switch harness connector. Ignition on, engine not running. Monitor the ESIM Switch state on the scan tool. Carefully connect a jumper wire between the (K107) ESM Signal circuit and the (Z913) Ground circuit in the EVAP System Monitor Switch harness connector. Monitor the ESIM Switch state on the scan tool. Did the Switch change from OPEN to CLOSED when the jumper wire was installed? Yes Go To 9 . No Go To 7 .
7. EXCESSIVE RESISTANCE IN THE (K107) ESM SIGNAL CIRCUIT 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 (K107) ESM Signal circuit from the ESM harness connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 8 . No Repair the excessive resistance in the (K107) ESM Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. EXCESSIVE RESISTANCE IN THE (Z913) GROUND CIRCUIT Using a 12-volt test light connected to B+, probe the (Z913) Ground circuit in the ESM harness connector. NOTE: The test light should illuminate brightly. Compare the brightness to that of a direct connection to B- (ground). Does the test light illuminate brightly? Yes Go To 14 . No Repair the excessive resistance in the (Z913) Ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
9. VERIFY EVAPORATIVE EMISSION LEAK WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. Turn the ignition off. To continue testing you will need Miller Tool #8404 Evaporative Emission Leak Detector (EELD). NOTE: The fuel tank should have between 20% and 80% of fuel tank capacity to properly test the EVAP system. Connect the red power lead of EELD to the battery positive terminal and the black ground lead to battery negative terminal. Block the vent hose of the EVAP Canister. Connect shop air to the EELD. Set the smoke/air control switch to AIR. Insert the tester's AIR supply tip (clear hose) into the.040 orifice on the tester's control panel. Press the remote smoke/air start button. Position the red flag on the air flow meter so it is aligned with the indicator ball. When the calibration is complete, release the remote button. The EELD flow meter is now calibrated in liters per minute. Install the service port adapter #8404-14 on the vehicle's service port (if equipped) or install the #8404-ADP into the filter line. Connect the Air supply hose from the EELD to the service port (if equipped) or to the #8404-ADP adapter. Press the remote button to activate AIR flow. Compare the flow meter indicator ball reading to the red flag. ABOVE the red flag indicates a leak present. BELOW the red flag indicates a sealed system. Is the indicator ball above the red flag? Yes Go To 10 . No Go To 12 .
10. EVAPORATIVE EMISSION LEAK DETECTION NOTE: A thorough visual inspection of the EVAP system hoses, tubes, and connections may save time in your diagnosis. Look for any physical damage or signs of wetness at connections. The strong smell of fuel vapors may aid diagnosis also. Remove the Air supply hose from the service port or the #8404-ADP adapter. Connect the SMOKE supply tip (black hose) to the service port (if equipped) or to the #8404-ADP adapter. Set the smoke/air control switch to SMOKE. NOTE: The flow meter indicator ball will not move at this point. Press the remote smoke/air start button. NOTE: Make sure that smoke has filled the EVAP system by continuing to press the remote smoke/air start button, remove the vehicle fuel cap, and wait for the smoke to exit. Once smoke is indicated reinstall the fuel cap. NOTE: For optimal performance, introduce smoke into the system for an additional 60 seconds; continue introducing smoke at 15 second intervals, as necessary. While still holding the remote smoke/air start button, use the white light (#8404-CLL) to follow the EVAP system path, and look for the source of the leak indicated by exiting smoke. If a leak is concealed from view (i.e, top of fuel tank), release the remote smoke/air start button, and use the ultraviolet (UV) black light #8404-UVL and the yellow goggles 8404-20 to look for residual traces of dye that are left behind by the smoke. The exiting smoke deposits a residual fluid that is either bright green or bright yellow in color when viewed with a UV light. NOTE: The EVAP System is divided into three zones. A leak from any of these zones can cause this DTC to set. The lists below specify the possible leak points in that specific zone. For further assistance see the Zone Identification Charts below. ZONE 1 1 Fuel Cap 2 Recirculation Check Valve. 3 Vapor Recirculation Line. 4 Signal Vapor Line for FVM. 5 Flow Management Valve. 6 Fuel Tank to Canister Vapor Line connection. 7 Fuel Tank Vent (Check Valve). 8 Vapor Line to Canister. 9 Flow Control Orifice. 10 Control Valve. 11 Liquid Trap. 12 Fuel Tank. 13 Check valve. 14 Fuel Fill Tube to Tank connector. 15 Fuel Fill Tube Damaged or disconnected EVAP system components. ZONE 2 1 Filter. 2 ESIM. 3 Canister Vent Line. 4 EVAP Canister. 5 Chassis Purge Valve. 6 Fuel Tank to Canister Vapor Line connection. 7 EVAP Purge connection. ZONE 3 1 EVAP Purge Vacuum Line. 2 Connection to Chassis Line. 3 Connection to Canister. 4 Chassis Purge Line. 5 EVAP Purge Vacuum Line. 6 Connection to EVAP Purge Harness. 7 Chassis EVAP Purge Line connection to Engine Vacuum. 8 EVAP Purge Valve. 9 Service Port. NOTE: Carefully inspect the vent side of the EVAP Canister. Due to the filtering system in the canister the smoke or dye may or may not be visible. Introducing smoke into the filtered side of the canister may assist in locating the leak. Select the appropriate response from the list below: A leak was found at the gas cap or fuel filler tube. Go To 11 . A leak was found in one or more of the EVAP System zones. If the leak is at a hose connection, remove the hose then reconnect the hose and check for a leak again. All other leaks repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No leaks were detected. Go To 12 .
11. LEAK AT GAS CAP Remove the SMOKE supply tip (black hose) from the service port (if equipped) or to the #8404-ADP adapter. Install gas cap adapter, Miller Tool #8382 (1/4 turn cap) or #6922 (screw cap) and #8399 (secondary seal depressor) and repeat test 5. NOTE: The gas cap adapter is being used as a known good cap. Was a leak found at the gas cap adapter? Yes Replace the Fuel Filler tube assembly. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the gas cap. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
12. EVAP PURGE HOSE/TUBE AND FRESH AIR FILTER OBSTRUCTION Inspect the EVAP Purge hose/tube for proper routing and installation between the EVAP Purge Solenoid and the Fuel Tank between the Fuel Tank and the EVAP Purge Canister Make sure the hose/tube and fresh air filter are not damaged, kinked, and free from any obstructions. Were any problems found? Yes Repair or replace as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 13 .
13. EVAP SYSTEM MONITOR SWITCH Use the wiring diagram/schematic as a guide, inspect the wiring and connections between the EVAP System Monitor Switch and the PCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for any broken, bent, pushed out, or corroded terminals. Verify that there is good pin to terminal contact in the ESIM Switch and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair and Replace as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the EVAP System Monitor Switch per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
14. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EVAP Purge Solenoid Assembly, ESIM Switch 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 Switch, Solenoid, 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: After the EVAP System small leak test has passed, with the engine running, ambient temperature between 4° C (39° F) and 35° (95° F), with the engine at idle after a calibrated amount of drive time has accumulated.

1. Set Condition: If the PCM detects that the purge vapor ratio and the ESM switch closed ratio are below a calculated value, the PCM commands the purge solenoid to flow at a specified rate to update the purge vapor ratio. If the ratio remains below a specified value, a one trip failure is recorded. Two Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: The ignition on or engine running. Battery voltage greater than 10 volts.

1. Set Condition: The PCM will set a trouble code if the actual state of the solenoid does not match the intended state. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

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1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION Ignition on, engine not running. With a scan tool, select View DTCs and record the related Freeze Frame data if any DTC(s) are present. Whether or not any DTC(s) are Active you will want to check the following items which may assist in repairing the customer's complaint successfully. Check the vehicle's repair history. If the vehicle has a repair history that pertains to the customer's current complaint, review the repair. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly. Check for any service bulletin(s) related to the customer's complaint or DTC(s). If a service bulletin applies, follow the instructions per the service bulletin. Choose the following scenario that best applies. The service bulletin repaired the customer's complaint. Testing complete. A DTC is present, no service bulletins apply, or the service bulletin didn't repair the customer's complaint. Go To 2 .
2. ACTIVE DTC Ignition on, engine not running. With the scan tool, Select View DTCs. Is the DTC Active at this time? Yes Go To 3 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
3. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the EVAP Purge Solenoid harness connector. Disconnect the C3 PCM harness connector. Ignition on, engine not running. Measure the voltage of the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K52) EVAP Purge Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (K70) EVAP PURGE RETURN CIRCUIT SHORTED TO VOLTAGE Measure the voltage of the (K70) EVAP Purge Return circuit in the EVAP Purge Solenoid harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K70) EVAP Purge Return circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Measure the resistance between ground and the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector. Is the resistance below 100 ohms? Yes Repair the (K52) EVAP Purge Control circuit for a short to ground. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K52) EVAP PURGE CONTROL 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 (K52) EVAP Purge Control circuit from the EVAP Purge Solenoid 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 (K52) EVAP Purge Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K70) EVAP PURGE RETURN 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 (K70) EVAP Purge Return circuit from the EVAP Purge Solenoid 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 (K70) EVAP Purge Return circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. EVAP PURGE SOLENOID Connect the C3 PCM harness connector. Ignition on, engine not running. NOTE: The DTC needs to be cleared before actuating the Purge Solenoid, if the DTC is not cleared, the Solenoid may not be allowed to actuate. With the scan tool, actuate the EVAP Purge Solenoid control to the ON (100%) position. Using a 12-volt test light connected to ground, probe the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector. NOTE: The test light should be illuminated and bright proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100% actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25% actuation, the brightness should be 25% as bright as a direct connection to the battery. Does the test light illuminate accordingly? Yes Verify that there is good pin to terminal contact in the Solenoid and the Powertrain Control Module connectors. If OK, replace the EVAP Purge Solenoid. 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 EVAP Purge Solenoid Assembly, ESIM Switch 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 Switch, Solenoid, 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: Immediately after the ignition has been turned off.

1. Set Condition: At key off, the PCM energizes the Purge Solenoid for a calibrated amount of time (30 seconds maximum) and stores the state of the ESIM switch. The state is evaluated again at the next key on. If the PCM does not detect that the ESIM switch is open, an error is detected. Two Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 222

1. VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION Ignition on, engine not running. With a scan tool, select View DTC(s) and record the related Freeze Frame data if any DTC(s) are present. Whether or not any DTC(s) are Active you will want to check the following items which may assist in repairing the customer's complaint successfully. Check the vehicle's repair history. If the vehicle has a repair history that pertains to the customer's current complaint, review the repair. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly. Check for any service bulletin(s) related to the customer's complaint or DTC(s). If a service bulletin applies, follow the instructions per the service bulletin. Choose the following scenario that best applies. The service bulletin repaired the customer's complaint. Testing complete. A DTC is present, no service bulletins apply, or the service bulletin didn't repair the customer's complaint. Go To 2 .
2. ACTIVE DTC NOTE: If the customer is experiencing an early fuel shut off during the fuel filling process along with P0440, P0441, and P0452 setting, you need to check for restrictions in the EVAP Purge tubes/hoses as well as the Fresh Air Filter before continuing. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs and record the related Freeze Frame data. It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 3 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
3. ESIM SWITCH STATE With a scan tool, select Data Display and view the ESIM Switch state. Disconnect the purge hose from the EVAP canister. Is the ESIM Switch state change from 'Closed' to 'Open' when the purge hose was disconnected? Yes Go To 4 . No Go To 7 .
4. EVAP PURGE HOSE/TUBE AND FRESH AIR FILTER OBSTRUCTION Turn the ignition off. Inspect the EVAP Purge hose/tube for proper routing and installation between the EVAP Purge Solenoid and the Fuel Tank and between the Fuel Tank and the EVAP Purge Canister. Make sure the hose/tube and fresh air filter are not damaged, kinked, and free from any obstructions. Check for any kink in the purge line connecting the LPV (Linear Purge Valve) to intake manifold. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K52) EVAP PURGE CONTROL CIRCUIT SHORTED TO GROUND Disconnect the C3 PCM harness connector. Measure the resistance between ground and the (K52) EVAP Purge Control circuit in the EVAP Purge Solenoid harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K52) EVAP Purge Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. EVAP PURGE SOLENOID Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the EVAP Purge Solenoid 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 EVAP Purge Solenoid and the Powertrain Control Module connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the EVAP Purge Solenoid in accordance with the Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. ESIM ASSEMBLY With a scan tool, select Data Display and view the ESIM Switch state. Disconnect the EVAP System Monitor Switch electrical connector. Does the ESIM Switch state change from CLOSED to OPEN when the switch is disconnected? Yes Verify that there is good pin to terminal contact in the ESIM and the Powertrain Control Module connectors. If OK, replace the ESIM Assembly. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 8 .
8. (K107) ESM SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C3 PCM harness connector. Measure the resistance between ground and the (K107) ESM Signal circuit in the ESIM Assembly harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K107) ESM Signal 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 EVAP Purge Solenoid Assembly, ESIM Switch 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 ESIM, EVAP Purge Solenoid, 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: With the engine running, during a cold start test with the fuel level above 12%, ambient temperature between 4° C and 32° C (39° F and 89° F) and the fuel system in closed loop. The test runs when the small leak test is maturing.

1. Set Condition: The PCM activates the EVAP Purge Solenoid to pull the EVAP system into a vacuum to close the ESM switch. Once the ESM switch is closed, the PCM turns the EVAP Purge solenoid off to seal the EVAP system. If the ESM switch reopens before the calibrated amount of time, a large leak error is detected. 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 ignition off, fuel level less than 88%, ambient temperature between 4° C and 43° C (39° F and 109° F), and the fuel system in closed loop.

1. Set Condition: As temperatures change, a vacuum is created in the fuel tank and EVAP system. With the EVAP system sealed, the PCM monitors the ESM switch. If the ESM switch does not close within a calibrated time, an error is detected by the PCM. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Ignition on. Ambient Temperature between 4° C and 32° C (39° F and 89° F). Close Loop fuel system. Test runs after the medium leak test is inconclusive and the PCM has senses a fuel increase.

1. Set Condition: If a leak greater than.090" is detected by the PCM for two consecutive cold start trips after a significant fuel level change, this DTC will set. One good trip turns off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: TEST No.1: With the ignition on, the fuel level is compared to the previous key down after a 20 second delay. TEST No.2: The PCM monitors the fuel level at ignition on.

1. Set Condition: TEST No.1: If the PCM does not see a difference in fuel level of greater than 0.1 volt the test will fail. TEST No.2: If the PCM does not see a change in the fuel level of.1765 over a set amount of miles the test will fail. Two trip fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 223

Scheme 224

Scheme 225

1. ACTIVE DTC NOTE: Diagnose any CAN - C or CAN - B Communication DTCs before continuing. NOTE: Diagnose P0462 or P0463 first, if set along with P0461. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs and record the related Freeze Frame data. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. VISUALLY INSPECT FUEL TANK Visually inspect the Fuel Tank for damage that may restrict the Fuel Sending Unit float from moving. Is the Fuel Tank OK? Yes Go To 3 . No Replace the Fuel Tank as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
3. (N4) FUEL LEVEL SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect the Fuel Pump Module harness connector. Disconnect the C7 TIPM harness connector. Measure the resistance of the (N4) Fuel Level Signal circuit from the Fuel Pump Module harness connector to the TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 4 . No Repair the open in the (N4) Fuel Level Signal circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (K91) SENSOR GROUND CIRCUIT OPEN Disconnect the C1 TIPM harness connector. Measure the resistance of the (K91) Sensor Ground circuit from the Fuel Pump Module harness connector to the C1 TIPM harness connector. Is the resistance below 100 ohms? Yes Repair the open in the (K91) Sensor Ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. INTERNAL INSPECTION OF THE FUEL TANK WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. Remove the Fuel Tank per Service Information. Remove the Fuel Pump Module. Visually inspect the inside of the Fuel Tank for any obstructions or deformities. Inspect the Fuel Pump Module Float arm for damage. Were any problems found? Yes Repair or replace as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 7 .
7. FUEL LEVEL SENSOR If there are no possible causes remaining, view repair. Repair Verify that there is good pin to terminal contact at the Fuel Pump Module and the Powertrain Control Module connectors. Replace the Fuel Level Sensor if no problems were found at the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on and battery voltage above 10.4 volts.

1. Set Condition: The fuel level sensor signal voltage goes below the minimum acceptable value. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 226

Scheme 227

1. ACTIVE DTC NOTE: Diagnose any CAN - C or CAN - B Communication DTCs before continuing. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs and record the related Freeze Frame data. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. FUEL LEVEL SENSOR Turn the ignition off. Disconnect the Fuel Pump Module harness connector. Ignition on, engine not running. Using a fused jumper wire, jump the (K91) Sensor Ground circuit to the (N4) Fuel Level Sensor No.1 Signal circuit in the Fuel Pump Motor harness connector. Did the Fuel gauge level change from empty to full? Yes Verify that there is good pin to terminal contact at the Fuel Pump Module, and the Totally Integrated Power Module connectors. If OK, replace the Fuel Level Sensor/Fuel Pump Module. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C7 TIPM harness connector. Measure the resistance between ground and the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (K91) SENSOR GROUND CIRCUIT Measure the resistance between the (N4) Fuel Level Signal circuit and the (K91) Sensor Ground circuit from the Fuel Pump Module harness connector. Is the resistance below 5.0 ohms? Yes Repair the short between the (K91) Sensor Ground circuit and the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. EXCESSIVE RESISTANCE IN THE (N4) FUEL LEVEL SIGNAL CIRCUIT Turn the ignition off. Measure the resistance of the (N4) Fuel Level Signal circuit from the Fuel Pump Module harness connector to the C7 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the excessive resistance in the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. TOTALLY INTEGRATED POWER MODULE (TIPM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Pump Module and the Totally Integrated Power Module (TIPM). 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 Fuel Pump Module and the TIPM connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the Totally Integrated Power Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on and battery voltage above 10.4 volts.

1. Set Condition: The fuel level sensor signal voltage at the PCM goes above a calibrated voltage for more than 90 seconds. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 228

1. ACTIVE DTC NOTE: Diagnose any CAN - C or CAN - B Communication DTCs before continuing. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs and record the related Freeze Frame data. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. FUEL LEVEL SENSOR Turn the ignition off. Disconnect the Fuel Pump Module electrical harness connector. Ignition on, engine not running. With a scan tool, monitor the Fuel Level Signal voltage. Connect a jumper wire between the (N4) Fuel Level Signal circuit and the (K91) Sensor ground circuit. Did the Fuel Level voltage change from approximately 5 volts to 0 volts? Yes Verify that there is good pin to terminal contact in the Fuel Pump Module and the TIPM connectors. If OK, replace the Fuel Level Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 . NOTE: Remove the jumper wire before continuing.
3. (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C7 TIPM harness connector. Ignition on, engine not running. Measure the voltage on the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector. Is there any voltage present? Yes Repair the short to voltage in the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (N4) FUEL LEVEL SIGNAL CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (N4) Fuel Level Signal circuit from the Fuel Pump Module harness connector to the C7 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 5 . No Repair the open in the (N4) Fuel Level Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. (K91) SENSOR GROUND CIRCUIT OPEN Disconnect the C1 TIPM harness connector. Measure the resistance of the (K91) Sensor Ground circuit from the Fuel Pump Module harness connector to the TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the open in the (K91) Sensor Ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. TOTALLY INTEGRATED POWER MODULE (TIPM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Pump Module and the Totally Integrated Power Module (TIPM). 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 Fuel Pump Module and the TIPM connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the Totally Integrated Power Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

Scheme 229

1. When Monitored: With the ignition on. Battery voltage greater than 10 volts.

1. Set Condition: The PCM is requesting the TIPM to turn on the Cooling Fan On and it is not operating. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: With the ignition on. Battery voltage greater than 10 volts.

1. Set Condition: The PCM is requesting the TIPM to turn on the Cooling Fan On and it is not operating. One 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, transmission not in park or neutral, brakes not applied, and engine RPM greater than 1500.

1. Set Condition: This code will set if no vehicle speed signal is received from the ABS Module up to 120 seconds for 2 consecutive trips. 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 and battery voltage greater than 10 volts. Transmission in Drive or Reverse.

1. Set Condition: This code will set if no vehicle speed signal is received from the ABS Module up to 120 seconds for 2 consecutive trips. 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 idling in drive, the brake applied, engine run time above a minimum calibrated value, and no VSS, MAF/MAP, ECT, TPS, ETC, CKP Sensor, fuel system, or injector DTCs present.

1. Set Condition: Engine speed is 100 RPM or more below target idle speed for 30 seconds. 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 idling in drive, the brake applied, engine run time above a minimum calibrated value, and no VSS, MAF/MAP, ECT, TPS, ETC, CKP Sensor, fuel system, or injector DTCs present.

1. Set Condition: Engine speed is 200 RPM or more above target idle speed for 30 seconds. Two Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: Cold start condition. Ambient Air temperature between -7° C and 50 ° C (19.4° F and 122° F). Engine Coolant temperature between -7° C and 50 ° C (19.4° F and 122° F). The difference between the Ambient Air temp and ECT temp at Start is equal to or less than 10° C (50° F). Engine running at idle only.

1. Set Condition: Engine RPM is 50 RPM or more (depending on vehicle specifications), below idle speed for at least 3 seconds and the average spark advance is above the threshold, too much spark advance, for a specified time limit. Two trip fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 230

1. ACTIVE DTC Ignition on, engine not running. NOTE: Low battery voltage can also cause excessive current draw, in very hot and very cold ambient temperatures. Make sure the battery can pass a load test before continuing. With a scan tool, select View DTCs. Diagnose any other PCM DTCs before continuing. Start the engine. Allow the engine 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. With a scan tool, select View DTCs. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending 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, dirt, or excessive carbon build up) 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. DIRTY AIR FILTER Remove and inspect the Air Filter. Is the Air Filter dirty? Yes Replace the Air Filter. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. CONTAMINATED FUEL Inspect the Fuel for contamination. (Dirt, water, or other foreign material) Is the fuel contaminated? Yes Drain the Fuel from the fuel tank into an approved gas holding tank and add clean fuel. Refer to «STANDARD PROCEDURE»(ref-306144-S17322326742008120900000) . No Go To 5 .
5. EXCESSIVE RESISTANCE IN THE (K124) ETC MOTOR (+) CIRCUIT Turn the ignition off. Disconnect the C2 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 along with the #8815-1 to perform the diagnosis. Using a voltmeter perform a voltage drop test. Backprobe the (K124) ETC Motor (+) circuit at the Throttle Body harness connector and probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter. 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. Start the engine and allow it to reach normal operating temperature. Monitor the voltmeter. Is the voltage below 0.5 of a volt? Yes Go To 6 . No Repair the excessive resistance in the (K124) ETC Motor (+) circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. EXCESSIVE RESISTANCE IN THE (K126) ETC MOTOR (-) CIRCUIT Turn the ignition off. Move the voltmeter leads to backprobe the (K126) ETC Motor (-) circuit at the Throttle Body harness connector and to probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter. 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. Start the engine and allow it to reach normal operating temperature. Monitor the voltmeter. Is the voltage below 0.5 of a volt? Yes Go To 7 . No Repair the excessive resistance in the (K126) ETC Negative circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. ETC MOTOR Turn the ignition off. 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. Disconnect special tool #8815-1 from the C2 PCM harness connector. Measure the resistance of the ETC Motor by probing the appropriate terminals of special tool #8815 for the (K124) ETC Positive circuit and the (K126) ETC Negative circuit. Is the resistance between 2.5 and 25 ohms at closed throttle? Yes Go To 8 . No 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) .
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: Cold start condition. Ambient Air temperature between -7° C and 50° C (19.4° F and 122° F). Engine Coolant temperature between -7° C and 50° C (19.4° F and 122° F). The difference between the Ambient Air temp and ECT temp at Start is equal to or less than 10° C (50° F). Engine running at idle only.

1. Set Condition: If a rough idle is detected and the Dynamic Crankshaft Fuel Control remains or returns to the high limit window for a calibrated time. Two trip fault.

Scheme 231

Scheme 232

1. CHECKING FOR CYLINDER MISFIRE CONDITION PRESENT NOTE: Check for any TSBs that apply to a Misfire condition. Review the vehicle repair history for any misfire condition repairs that have been performed. NOTE: Reviewing the vehicle repair history may aid in the repair of the misfire condition. Start the engine. Allow the engine 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. With a scan tool, select View DTCs. Is P0300 or any other Misfire DTCs set along with the P050D. Is there a misfire present at this time? Yes Refer to the appropriate Cylinder Misfire Diagnostic procedure. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 2 .
2. ACTIVE DTC Diagnose all other trouble codes before continuing. NOTE: Check for contaminants that may have damaged an O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant. Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, select View DTCs. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 3 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
3. CHECKING FUEL PRESSURE WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. Turn the ignition off. Install a fuel pressure gauge to the fuel rail. Ignition on, engine not running. With a scan tool, actuate the ASD Fuel System test and observe the fuel pressure gauge. NOTE: The DTC needs to be cleared before actuating the System Test, if the DTC is not cleared, the System Test may not be allowed to actuate. NOTE: Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi). Turn the ignition off. Choose a conclusion that best matches your fuel pressure reading. Within Specification Go To 4 . Above Specification Replace the fuel filter/pressure regulator. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . Below Specification Go To 13 . CAUTION: Stop All Actuations.
4. O2 SENSOR OPERATION Start the engine. Allow the engine to reach normal operating temperature. NOTE: If one of the O2 Sensor's Signal or Return circuit is shorted to ground the scan tool will display all O2 Sensor voltage readings low. The O2 Sensor that is shorted to ground will display a voltage reading near or at 0 volts. NOTE: If one of the O2 Sensor Signal or Return circuits are shorted to voltage, the scan tool will display all O2 Sensor voltage readings high. NOTE: After the repairs have been made, verify proper O2 Sensor operation. If all the O2 Sensor voltage readings have not returned to normal, follow the diagnostic procedure for the remaining O2 Sensors. With a scan tool, monitor all of the O2 Sensor voltage readings. Is the voltage switching between 2.5 and 3.4 volts for all the O2 Sensors? Yes Go To 5 . No Go To 9 .
5. 1/1 O2 SENSOR HEATER OPERATION Turn the ignition off. NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor to cool down before continuing the test. Allow the O2 Sensor voltage to stabilize at 5.0 volts. Ignition on, engine not running. With a scan tool, actuate the 1/1 O2 Heater Test. NOTE: The DTC needs to be cleared before actuating the Heater Test, if the DTC is not cleared, the Heater Test may not be allowed to actuate. With the scan tool, monitor 1/1 O2 Sensor voltage for at least 2 minutes. Does the voltage stay above 4.5 volts? Yes Verify that there is good pin to terminal contact in the 1/1 O2 Sensor and the Powertrain Control Module connectors. Replace the 1/1 O2 Sensor if no problems were found in the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. MAP SENSOR OPERATION Turn the ignition off. Connect a Vacuum Gauge to a Manifold Vacuum source. Start the engine. Allow the engine to idle. NOTE: If engine will not idle, maintain a constant RPM above idle. With the scan tool, read the MAP Sensor vacuum value. Is the scan tool reading within 1" of Hg on the Vacuum Gauge reading? Yes Go To 7 . No Verify that there is good pin to terminal contact in the MAP Sensor and the Powertrain Control Module connectors. Replace the MAP Sensor if no problems were found in the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. ECT SENSOR OPERATION NOTE: For this test to be valid, the thermostat must be operating correctly. NOTE: This test works best if performed on a cold engine (cold soak) Ignition on, engine not running. With a scan tool, read the Engine Coolant Temperature (ECT) Sensor 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 ECT Sensor value. The temperature value change should be a smooth transition from start up to normal operating temperature 82° C (180° F). The value should reach at least 82° C (180° F). Did the ECT value increase smoothly and did it reach at least 82° C (180° F)? Yes Go To 8 . No Verify that there is good pin to terminal contact in the ETC Sensor and the Powertrain Control Module connectors. Replace the Engine Coolant Temperature Sensor if no problems were found in the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. ENGINE MECHANICAL PROBLEM Turn the ignition off. Check for any of the following conditions/mechanical problems. AIR INDUCTION SYSTEM - must be free from leaks. ENGINE VACUUM - must be at least 13 inches in neutral ENGINE VALVE TIMING - must be within specifications ENGINE COMPRESSION - must be within specifications ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks. ENGINE PCV SYSTEM - must flow freely TORQUE CONVERTER STALL SPEED - must be within specifications POWER BRAKE BOOSTER - no internal vacuum leaks FUEL - must be free of contamination FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector Are there any engine mechanical problems? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 12 .
9. 1/1 O2 SENSOR Turn the ignition off. Disconnect the 1/1 O2 Sensor harness connector. Ignition on, engine not running. With a scan tool, monitor the 1/1 O2 Sensor voltage. O2 Sensor voltage should read between 4.1 and 5.0 volts on the scan tool with the connector disconnected. Connect a jumper wire between the (K41) O2 1/1 Signal circuit and the (K902) O2 Return Upstream circuit in the O2 Sensor harness connector. NOTE: The voltage should drop from between 4.1 and 5.0 volts to 2.5 volts with the jumper wire in place. Did the O2 Sensor voltage change from between 4.1 and 5.0 volts to 2.5 volts with the jumper wire installed? Yes Verify that there is good pin to terminal contact in the related Sensors and the Powertrain Control Module connectors. Replace the 1/1 O2 Sensor. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 10 . NOTE: Remove the jumper wire before continuing.
10. (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT With a scan tool, monitor the 1/1 O2 Sensor voltage reading with the jumper wire removed. NOTE: The scan tool will display all O2 Sensor voltage readings approximately 5.0 volts when only one O2 Sensor's Signal circuit is shorted to voltage. NOTE: The scan tool will display one O2 Sensor voltage close to zero and the others will read lower than normal when one O2 Sensor Signal circuit contains excessive resistance. Is the voltage between 4.1 and 5.0 volts? Yes Go To 11 . No Check the (K41) O2 Sensor 1/1 Signal circuit for a short to ground, open, or short to voltage. Inspect the O2 Sensor connector and the PCM harness connector. If OK, replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
11. (K902) O2 RETURN UPSTREAM CIRCUIT Measure the voltage on the (K902) O2 Return Upstream circuit in the O2 Sensor harness connector. Is the voltage at 2.5 volts? Yes Go To 12 . No Check the O2 Return circuit for a short to ground, open, or short to voltage. Inspect the O2 Sensor connector and the PCM harness connector. If OK, replace and program the Powertrain Control Module per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
12. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Sensors 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 related Sensors 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) .
13. RESTRICTED FUEL SUPPLY LINE WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death. Raise vehicle on hoist, and disconnect the fuel pressure line at the fuel pump module. Install special 5/16 fuel line adapter tool #6539 between disconnected fuel line and the fuel pump module. Attach a fuel pressure test gauge to the T fitting on tool #6539. Ignition on, engine not running. With a scan tool, actuate the ASD Fuel System test and observe the fuel pressure gauge. NOTE: The DTC needs to be cleared before actuating the System Test, if the DTC is not cleared, the System Test may not be allowed to actuate. NOTE: Fuel pressure specification is 407 kPa +/- 34 kPa (59 psi +/- 5 psi). Is the fuel pressure within specification? Yes Repair or replace fuel supply line as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 14 . CAUTION: Stop All Actuations.
14. FUEL PUMP INLET STRAINER WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Turn the ignition off. Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer. Is the Fuel Inlet Strainer plugged? Yes Replace the Fuel Pump Inlet Strainer. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 15 .
15. FUEL PUMP MODULE If there are no possible causes remaining, view repair. Repair Verify that there is good pin to terminal contact in the Fuel Pump Module, Relay, Cluster, and Powertrain Control Module connectors. Replace the Fuel Pump Module if no problems were found in the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. When Monitored: Ignition on.

1. Set Condition: The PCM detects an invalid SKIM key. One Trip Fault.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

1. When Monitored: With the ignition key on and battery voltage above 10.4 volts.

1. Set Condition: The PCM detects that the Engine Oil Pressure Sensor input voltage is below the minimum acceptable value. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 233

Scheme 234

Scheme 235

Scheme 236

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. 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. OIL PRESSURE SWITCH Turn the ignition off. Disconnect the Oil Pressure Switch harness connector. Ignition on, engine not running. With the scan tool monitor the Oil Pressure Switch state. Connect a jumper wire to the (G6) Oil Pressure Signal circuit in the Sensor harness connector. Touch the other end of the jumper wire to a known good Ground several times. Did the Oil Pressure Switch state change from High to Low when connecting and disconnecting the jumper wire to ground? Yes Verify that there is good pin to terminal contact in the Oil Pressure Switch and the Powertrain Control Module connectors. If OK, replace the Engine Oil Pressure Switch. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 . NOTE: Remove the jumper wire before continuing.
3. (G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C1 PCM harness connector. Ignition on, engine not running. Measure the voltage on the (G6) Oil Pressure Signal circuit in the Switch harness connector. Is there any voltage present? Yes Repair the short to voltage on the (G6) Oil Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (G6) OIL PRESSURE SWITCH SIGNAL 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 (G6) Oil Pressure Signal circuit from the Oil Pressure Switch 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 (G6) Oil Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. (G6) SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between a known good ground and the (G6) Oil Pressure Signal circuit in the Switch connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (G6) Oil Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Oil Pressure Switch 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 Oil Pressure Switch 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 237

1. When Monitored: Engine running, AC is learned, and AC Clutch Relay energized.

1. Set Condition: The PCM detects that the A/C Pressure Transducer input voltage is below the minimum acceptable value. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 238

Scheme 239

Scheme 240

Scheme 241

Scheme 242

Scheme 243

1. ACTIVE DTC NOTE: Diagnose any CAN - C Communication DTCs before continuing. NOTE: Make sure the A/C refrigerant System is properly charged per Service Information. 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. 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. (C818) 5-VOLT SUPPLY CIRCUIT Turn the ignition off. Disconnect the A/C Pressure Transducer harness connector. Ignition on, engine not running. Measure the voltage on the (C818) 5-volt Supply circuit in the A/C Pressure Transducer harness connector. Is the voltage between 4.5 to 5.2 volts? Yes Go To 3 . No Go To 7 .
3. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C1 TIPM harness connector. Measure the resistance between ground and the (C18) A/C Pressure Signal circuit in the A/C Pressure Transducer harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO THE (C918) SENSOR GROUND CIRCUIT Measure the resistance between the (C18) A/C Pressure Signal circuit and the (C918) Sensor Ground circuit in the A/C Pressure Transducer harness connector. Is the resistance below 100 ohms? Yes Repair the short between the (C918) Sensor Ground circuit and the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. (C18) A/C PRESSURE SIGNAL CIRCUIT OPEN Measure the resistance of the (C18) A/C Pressure Signal circuit from the A/C Pressure Transducer harness connector to C1 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 6 . No Repair the excessive resistance in the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
6. A/C PRESSURE TRANSDUCER Connect the C1 TIPM harness connector. Turn the ignition on. With the scan tool, monitor the A/C Pressure Transducer voltage. NOTE: The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the connector disconnected. Does the scan tool display the voltage as described above? Yes Verify that there is good pin to terminal contact in the A/C Pressure Transducer and the Powertrain Control Module connectors. If OK, replace the A/C Pressure Transducer. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
7. (C818) 5-VOLT SUPPLY CIRCUIT OPEN Turn the ignition off. Disconnect the C1 TIPM harness connector. Measure the resistance of the (C818) 5-volt Supply circuit from the A/C Pressure Transducer harness connector to the C1 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 8 . No Repair the open in the (C818) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
8. (C818) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (C818) 5-volt Supply circuit in the A/C Pressure Transducer harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (C818) 5-volt Supply circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 9 .
9. TOTALLY INTEGRATED POWER MODULE Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related A/C Pressure Transducer and the Totally Integrated Power Module (TIPM). 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 A/C Pressure Transducer and the Totally Integrated Power Module connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the Totally Integrated Power Module per Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. When Monitored: Engine running and the A/C Clutch Relay energized.

1. Set Condition: The PCM detects that the A/C Pressure Transducer input voltage is above the maximum acceptable value. One trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 244

Scheme 245

Scheme 246

Scheme 247

1. ACTIVE DTC NOTE: Diagnose any CAN - C Communication DTCs before continuing. NOTE: Make sure the A/C refrigerant system is properly charged per Service Information. 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. 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. A/C PRESSURE TRANSDUCER Turn the ignition off. Disconnect the A/C Pressure Transducer harness connector. Ignition on, engine not running. With the scan tool, monitor the A/C Pressure Transducer voltage. Connect a jumper wire between the (C18) A/C Pressure Signal circuit and the (C918) Sensor Ground circuit in the Transducer harness connector. 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 A/C Pressure Transducer and the Totally Integrated Power Module connectors. If OK, replace the A/C Pressure Transducer. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 . NOTE: Remove the jumper wire before continuing.
3. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C1 TIPM harness connector. Ignition on, engine not running. Measure the voltage on the (C18) A/C Pressure Signal circuit in the A/C Pressure Transducer harness connector. Is there any voltage present? Yes Repair the short to voltage in the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. (C18) A/C PRESSURE SIGNAL CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (C18) A/C Pressure Signal circuit from the A/C Pressure Transducer harness connector to C1 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 5 . No Repair the open in the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
5. (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO THE (C818) 5-VOLT SUPPLY CIRCUIT Measure the resistance between the (C18) A/C Pressure Signal circuit and the (C818) 5-volt Supply circuit in the A/C Pressure Transducer harness connector. Is the resistance below 5.0 ohms? Yes Repair the short between the (C818) 5-volt Supply circuit and the (C18) A/C Pressure Signal circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (C918) SENSOR GROUND CIRCUIT OPEN Measure the resistance of the (C918) Sensor Ground circuit from the A/C Pressure Sensor harness connector to the C1 TIPM harness connector. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the open in the (C918) Sensor Ground circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. TOTALLY INTEGRATED POWER MODULE (TIPM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related A/C Pressure Transducer and the Totally Integrated Power Module (TIPM). 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 A/C Pressure Transducer and the Totally Integrated Power Module connectors. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Replace the Totally Integrated Power Module per Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 248

1. When Monitored: With the ignition on. Engine RPM greater than 1000 RPM. With no other charging system codes set.

1. Set Condition: Battery voltage is less than the desired voltage for more than 10 seconds. Battery voltage greater than 15.75 volts. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 249

Scheme 250

Scheme 251

Scheme 252

1. ACTIVE DTC NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing. NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output. NOTE: Make sure the generator drive belt is in good operating condition. NOTE: Inspect the fuses in the TIPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage. Start the engine. Allow the engine 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. With a scan tool, select View DTCs. NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data. Is the DTC Active or Pending at this time? Yes Go To 2 . No Refer to the «INTERMITTENT CONDITION»(ref-306207-S19641665412008120900000) Diagnostic Procedure.
2. BATTERY NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester or an equivalent Battery tester, test the Battery before continuing. Does the Battery pass the load test for this specific application? Yes Go To 3 . No Replace the Battery per Service Information. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
3. (A801) B+ CIRCUIT HIGH RESISTANCE 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: Make sure all wires are clear of the engine's moving parts. Measure the voltage between the (A801) B+ Terminal at the Generator and the Battery + Post. Start the engine. Is the voltage above 0.4 of a volt? Yes Repair the excessive resistance in the (A801) B+ circuit between the Generator and Battery. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. GENERATOR CASE GROUND HIGH RESISTANCE Allow the engine to reach normal operating temperature. NOTE: Make sure all wires are clear of the engine's moving parts. Measure the voltage between the Generator case and Battery ground post. Is the voltage above 0.1 of a volt? Yes Repair excessive resistance in the Generator Ground between the Generator Case and Battery ground side. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 5 .
5. GENERATOR OPERATION Turn the ignition off. Disconnect the Generator Field harness connector. Using a 12-volt test light connected to ground, probe the (K125) Generator Field Control circuit in the Generator Field harness connector. NOTE: Make sure the test light is probing the circuit before actuating the Test or a DTC may set and not allow the actuation. Ignition on, engine not running. With a scan tool, actuate the Generator Field Driver. NOTE: The test light should be illuminated and bright proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100% actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25% actuation, the brightness should be 25% as bright as a direct connection to the battery. Does the test light illuminate accordingly during the actuation? Yes Verify that there is good pin to terminal contact in the Generator and Powertrain Control Module connectors. Replace the Generator if no problems were found with the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 6 .
6. (K125) GENERATOR FIELD CONTROL 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 (K125) Gen Field Control circuit from the Generator harness connector to the appropriate terminal of the special tool #8815. Is the resistance below 5.0 ohms? Yes Go To 7 . No Repair the open in the (K125) Gen Field Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .
7. (K125) GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (K125) Gen Field Control circuit in the Generator Field harness connector. Is the resistance below 100 ohms? Yes Repair the short to ground in the (K125) Gen Field Control 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 Generator 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 Generator and 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: With the ignition on. Engine RPM greater than 1000 RPM. With no other charging system codes set.

1. Set Condition: Battery voltage is 1 volt greater than desired voltage for more than 10 seconds. Battery voltage greater than 15.75 volts. One Trip Fault. Three good trips to turn off the MIL.

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.

Scheme 253

1. ACTIVE DTC NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing. NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output. NOTE: Inspect the fuses in the TIPM. If a fuse is open use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage. 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. GENERATOR OPERATION Turn the ignition off. Disconnect the Generator Field harness connector. Using a 12-volt test light connected to ground, probe the (K125) Generator Field Control circuit in the Generator Field harness connector. Ignition on, engine not running. With a scan tool, actuate the Generator Field Driver. NOTE: The test light should be illuminated and bright proportional to the maximum duty cycle allowed by the scan tool. For example, if the scan tool allows 100% actuation, the brightness should be as bright as a direct connection to the battery. If the scan tool allows a maximum 25% actuation, the brightness should be 25% as bright as a direct connection to the battery. Does the test light illuminate accordingly during the actuation? Yes Verify that there is good pin to terminal contact in the Generator and Powertrain Control Module connectors. Replace the Generator if no problems were found with the connectors. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 3 .
3. (K125) FIELD CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the C2 PCM harness connector. Ignition on, engine not running. Measure the voltage on the (K125) Gen Field Control circuit at the Generator Field harness connector. Is there any voltage present? Yes Repair the short to voltage in the (K125) Gen Field Control circuit. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) . No Go To 4 .
4. POWERTRAIN CONTROL MODULE (PCM) Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator 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 Generator and 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) .