CHECKING THE COMPONENTS AND WIRING
Check the intake system for air leakage.
Check the exhaust system for air leakage.
Checking fuel and residual pressure.
Check the compression of the engine.
Remedy as necessary.
Note. Try a new catalytic converter if the above fault-tracing does not remedy the fault.
Other information
- see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-520006-S19657292492012123100000)
- see «AIR LEAKAGE EXHAUST SYSTEM, CHECK»(ref-520007-S29175372722012123100000)
- see «FUEL SYSTEM PRESSURE, CHECKING»(ref-500313-S30269329262012091100000)
- see «LEAK DETECTING CYLINDER»(ref-520006-S12017404942012123100000)
- see «CATALYTIC CONVERTER»(ref-500310-S16093357772012091100000)
Scheme 126
- Continue Refer to «VERIFICATION»(ref-500319-S09674182292012091100000)
CHECKING THE COMPONENT AND WIRING
Check the fuse for the circuit.
Check the resistance of the evaporative emission system (EVAP) valve.
Check the evaporative emission system (EVAP) valve connector. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #A50 (#A50) and evaporative emission system (EVAP) valve terminal #2. Check for an open-circuit.
Check the power supply cable between system relay and evaporative emission system (EVAP) valve terminal #1. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
Scheme 127
- Continue Refer to «VERIFICATION»(ref-500319-S15628372602012091100000)
Check the resistance of the evaporative emission system (EVAP) valve.
Check the signal cable between engine control module (ECM) terminal #A50 (#A50) and evaporative emission system (EVAP) valve terminal #2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S35957693732012091100000)
Check the resistance of the evaporative emission system (EVAP) valve.
Check the signal cable between engine control module (ECM) terminal #A50 (#A50) and evaporative emission system (EVAP) valve terminal #2. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S39567176022012091100000)
CHECKING THE WIRING
Check the cable between engine control module (ECM) terminal #B33 (#C33) and leak diagnostic unit terminal #1. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
Scheme 128
- Continue Refer to «INFORMATION»(ref-500319-S24310238592012091100000)
Check the cable between engine control module (ECM) terminal #B33 (#C33) and leak diagnostic unit terminal #1. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S21849987492012091100000)
Check the cable between engine control module (ECM) terminal #B33 (#C33) and leak diagnostic unit terminal #1. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S35672147702012091100000)
Check the cable between engine control module (ECM) terminal #B33 (#C33) and leak diagnostic unit terminal #1. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S32362999422012091100000)
Check the cable for an open-circuit.
Take readings between
- Engine Control Module (ECM) #B45 (#C45) and leakage diagnostic unit #2.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S38824246202012091100000)
Check the signal cable. Check for a short-circuit to supply voltage.
Take readings between
- Engine Control Module (ECM) #B45 (#C45) and leakage diagnostic unit #2.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S14190402672012091100000)
Check the signal cable. Check for a short-circuit to ground.
Take readings between
- Engine Control Module (ECM) #B45 (#C45) and leakage diagnostic unit #2.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S16116389742012091100000)
Check the cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S36022235372012091100000)
Check the cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S23257046812012091100000)
Check the cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S20706051792012091100000)
Check the cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to ground.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S20446283492012091100000)
CHECKING COMPONENTS AND WIRING
Check the fuse for the circuit.
Check the leak diagnostic unit connectors. Check for contact resistance and oxidation.
Check the resistance of the valve between the leak diagnostic pump connector terminals #3 and #4 (leak diagnostic unit side).
Check the signal cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic pump terminal #3. Check for an open-circuit.
Check the power supply cable between system relay terminal #5 and leak diagnostic unit terminal #4. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S12077243372012091100000)
Check the resistance of the valve between the leak diagnostic unit connector terminals #3 and #4 (leak diagnostic pump side).
Check the signal cable between control module terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to supply voltage.
Try a new leak diagnostic unit if no fault is found during the above fault-tracing.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S38924531632012091100000)
Check the signal cable between engine control module (ECM) terminal #B46 (#C46) and leak diagnostic unit terminal #3. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S25171610972012091100000)
Check the leakage diagnostics unit's connector for contact resistance and oxidation.
Check the pump motor's resistance between the leakage diagnostic unit's connector #1 and #4 (against the leakage diagnostics pump).
Check the cable for an open-circuit.
Take readings between
- Engine Control Module (ECM) #B23 (#C23) and leakage diagnostic unit #1.
Check the voltage cable between system relay #5 and the leakage diagnostics unit #4 for open circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S00592094442012091100000)
Check the pump motor's resistance between the leakage diagnostic unit's connector #1 and #4 (against the leakage diagnostics pump).
Check the signal cable. Check for a short-circuit to supply voltage.
Take readings between
- Engine Control Module (ECM) #B23 (#C23) and leakage diagnostic unit #1.
Try a new leakage diagnostics unit if no defect is found during the above troubleshooting.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S25817810902012091100000)
Check the pump motor's resistance between the leakage diagnostic unit's connector #1 and #4 (against the leakage diagnostics pump).
Check the signal cable. Check for a short-circuit to ground.
Take readings between
- Engine Control Module (ECM) #B23 (#C23) and leakage diagnostic unit #1.
Try a new leakage diagnostics unit if no defect is found during the above troubleshooting.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «COMPONENT SPECIFICATIONS»(ref-500252-S01220863972012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S39804266642012091100000)
Check the cable between engine control module (ECM) terminal #B23 (#C23) and leak diagnostic unit terminal #2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S02292396122012091100000)
Check the cable between engine control module (ECM) terminal #B23 (#C23) and leak diagnostic unit terminal #2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S06942057662012091100000)
Check the cable between engine control module (ECM) terminal #B23 (#C23) and leak diagnostic unit terminal #2. Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S30295981132012091100000)
Check the cable between engine control module (ECM) terminal #B23 (#C23) and leak diagnostic unit terminal #2. Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LEAK DIAGNOSTIC PUMP»(ref-500308-S18565257782012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «INFORMATION»(ref-500319-S35095350702012091100000)
- Check the engine speed (RPM) sensor connector. Check for intermittent contact resistance and oxidation. HINT: The engine speed (RPM) sensor and its wiring are sensitive to interference from surrounding cables, the starter motor cable for example, or similar high amperage cables. Interference can cause difficulty in starting the engine, the engine does not start at all, intermittent operation of the tachometer, etc. Check whether any cables with high power consumption are incorrectly installed, i. e. too close to the engine speed (RPM) sensor or its wiring. Check that the engine speed (RPM) sensor is correctly installed. Remedy as necessary Other information see «CRANKSHAFT POSITION SENSOR (CKP)»(ref-500254-S09648082822012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S38341803672012091100000)
Check the cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S24795875862012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
Scheme 129
- Continue Refer to «VERIFICATION»(ref-500319-S02044208702012091100000)
Check the cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S27787116702012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S19772779192012091100000)
Check the cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S24795875862012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S26762149982012091100000)
Check the cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S27787116702012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S42776282502012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check that the air conditioning (A/C) system has sufficient refrigerant. Check that there is no leakage.
HINT: The diagnostic trouble code (DTC) can also be caused by a damaged air conditioning (A/C) pressure sensor.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S24795875862012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S25295120252012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check that the air conditioning (A/C) system has sufficient refrigerant. Check that there is no leakage.
HINT: The diagnostic trouble code (DTC) can also be caused by a damaged air conditioning (A/C) pressure sensor.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S27787116702012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S38639104772012091100000)
HINT: The diagnostic trouble code (DTC) for this fault can be stored in the central electronic module (CEM). Reading diagnostic trouble codes (DTCs) in the central electronic module (CEM).
Check the signal cable between engine control module (ECM) terminal #B17 (#C17) and the central electronic module (CEM). Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
Scheme 130
- Continue Refer to «VERIFICATION»(ref-500319-S26390402552012091100000)
HINT: The diagnostic trouble code (DTC) for this fault can be stored in the central electronic module (CEM). Reading diagnostic trouble codes (DTCs) in the central electronic module (CEM).
Check the signal cable between engine control module (ECM) terminal #B17 (#C17) and the central electronic module (CEM). Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S41265057442012091100000)
HINT: The diagnostic trouble code (DTC) for this fault can be stored in the central electronic module (CEM). Reading diagnostic trouble codes (DTCs) in the central electronic module (CEM).
Check the fuse for the circuit.
Check the signal cable between engine control module (ECM) terminal #B17 (#C17) and the central electronic module (CEM). Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S08653660702012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S40457351842012091100000)
HINT: The diagnostic trouble code (DTC) for this fault can be stored in the central electronic module (CEM). Reading diagnostic trouble codes (DTCs) in the central electronic module (CEM).
Check the fuse for the circuit.
Check the signal cable between engine control module (ECM) terminal #B17 (#C17) and the central electronic module (CEM). Check for a short-circuit to ground. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S40520643792012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S22950899832012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check that the air conditioning (A/C) system has sufficient refrigerant. Check that there is no leakage.
HINT: The diagnostic trouble code (DTC) can also be caused by a damaged air conditioning (A/C) pressure sensor.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S32679231902012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for an open-circuit.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S22997022332012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check the signal cable. Check for a short-circuit to supply voltage.
Take readings between
- Engine Control Module (ECM) #B51 (#C51) and AC pressure sensor #2.
Check the ground lead. Check for an open-circuit.
Take readings between
- Engine Control Module (ECM) #B53 (#C53) and AC pressure sensor #1.
Check the power cable with regard to open circuit.
Take readings between
- Engine Control Module (ECM) #B31 (#C31) and AC pressure sensor #3.
HINT: The voltage must be approximately 5 V between air conditioning (A/C) pressure sensor terminal #3 and ground with the ignition switched on.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CHECKING WIRING AND TERMINALS»(ref-500249-S05296466302012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S33816825802012091100000)
Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to ground. Check for an open-circuit.
Check the power cable between engine control module (ECM) terminal #B31 (#C31) and air conditioning (A/C) pressure sensor terminal #3. Check for an open-circuit.
HINT: The voltage must be approximately 5 V between air conditioning (A/C) pressure sensor terminal #3 and ground with the ignition switched on.
Remedy as necessary.
Other information
- see «CONNECTING THE BREAKOUT BOX»(ref-500251-S16432032892012091100000)
- see «SIGNAL SPECIFICATION»(ref-500252-S36983929532012091100000)
- see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-500307-S22083409362012091100000)
- see «CONTENTS»(ref-500249-S15428429872012091100000)
- Continue Refer to «VERIFICATION»(ref-500319-S31326374212012091100000)