Engine Controls - System & Component Testing - Titan: Wiring Nissan Titan I

WIRING DIAGRAM

For complete wiring diagrams, see SYSTEM WIRING DIAGRAMS - TITAN article.

Scheme 944

Specification data are reference values and are measured between each terminal and ground.

Scheme 945

Scheme 946

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT-II.

Scheme 947

Scheme 948

Specification data are reference values and are measured between each terminal and ground. Pulse signal is measured by CONSULT-II.

Scheme 949

Scheme 950

Scheme 951

Scheme 952

Scheme 953

Scheme 954

Scheme 955

Scheme 956

Scheme 957

1. CHECK ENGINE START Turn ignition switch OFF, and restart engine. Is engine running? Yes or No Yes (With CONSULT-II): GO TO 2. Yes (Without CONSULT-II): GO TO 3. No: GO TO 4 .
2. CHECK OVERALL FUNCTION With CONSULT-II Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II. Make sure that each circuit produces a momentary engine speed drop. OK or NG OK : INSPECTION END NG: GO TO 10 .
3. CHECK OVERALL FUNCTION Without CONSULT-II Let engine idle. Read the voltage signal between ECM terminals 46, 60, 61, 62, 65, 79, 80, 81 and ground with an oscilloscope. Verify that the oscilloscope screen shows the signal wave as shown below. NOTE: The pulse cycle changes depending on rpm at idle. OK or NG OK : INSPECTION END NG: GO TO 10 .
4. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I Turn ignition switch OFF, wait at least 10 seconds and then turn ON. Check voltage between ECM terminals 119, 120 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 5. NG: GO TO «POWER SUPPLY AND GROUND CIRCUIT»(ref-169472-S08707192562004120900000) .
5. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II Turn ignition switch OFF. Disconnect condenser harness connector. Turn ignition switch ON. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 8 . NG: GO TO 6.
6. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III Turn ignition switch OFF. Disconnect IPDM E/R connector E119. Check harness continuity between IPDM E/R terminal 4 and condenser terminal 1. Refer to «WIRING DIAGRAM»(ref-169809-S29552002402004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO to «POWER SUPPLY AND GROUND CIRCUIT»(ref-169472-S08707192562004120900000) . NG: GO TO 7.
7. DETECT MALFUNCTIONING PART Check the following. Harness connectors E2, F32 Harness for open or short between ignition coil and IPDM E/R : Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Check harness continuity between condenser terminal 2 and engine ground. Refer to «WIRING DIAGRAM»(ref-169809-S29552002402004121600000) . Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 9. NG: Repair open circuit or short to power in harness or connectors.
9. CHECK CONDENSER Refer to «COMPONENT INSPECTION»(ref-169809-S15192000602004121600000) . OK or NG OK: GO TO 10. NG: Replace condenser.
10. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV Turn ignition switch OFF. Reconnect all harness connectors disconnected. Disconnect ignition coil harness connector. Turn ignition switch ON. Check voltage between ignition coil terminal 3 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 12. NG: GO TO 11.
11. DETECT MALFUNCTIONING PART Check the following. Harness connectors E2, F32 Harness for open or short between ignition coil and harness connector F32 : Repair or replace harness or connectors.
12. CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Check harness continuity between ignition coil terminal 2 and engine ground. Refer to «WIRING DIAGRAM»(ref-169809-S29552002402004121600000) . Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 13. NG: Repair open circuit or short to power in harness or connectors.
13. CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT Disconnect ECM harness connector. Check harness continuity between ECM terminals 46, 60, 61, 62, 65, 79, 80, 81 and ignition coil terminal 1. Refer to «WIRING DIAGRAM»(ref-169809-S29552002402004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 14. NG: Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK IGNITION COIL WITH POWER TRANSISTOR Refer to «COMPONENT INSPECTION»(ref-169809-S15192000602004121600000) . OK or NG OK: GO TO 15. NG: Replace ignition coil with power transistor.
15. CHECK INTERMITTENT INCIDENT Refer to «TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT»(ref-169472-S11178043272004120900000) . INSPECTION END

Scheme 958

Scheme 959

1. Turn ignition switch OFF.
2. Disconnect ignition coil harness connector.
3. Check resistance between ignition coil terminals as follows.

Scheme 960

Scheme 961

1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals 1 and 2.

For complete wiring diagrams, see SYSTEM WIRING DIAGRAMS article.

Scheme 962

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT-II.

Scheme 963

Scheme 964

Scheme 965

Scheme 966

Scheme 967

1. INSPECTION START Turn ignition switch to START. Is any cylinder ignited? Yes or No Yes: GO TO 2. No: GO TO 3.
2. CHECK OVERALL FUNCTION With CONSULT-II Start engine. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II. Make sure that each circuit produces a momentary engine speed drop. Without CONSULT-II Start engine. Listen to each injector operating sound. Clicking noise should be heard. OK or NG OK INSPECTION END NG: GO TO 3.
3. CHECK INJECTOR POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect injector harness connector. Turn ignition switch ON. Check voltage between injector terminal 1 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 5. NG: GO TO 4.
4. DETECT MALFUNCTIONING PART Check the following. Harness connectors E2, F32 IPDM E/R connector E119 15A fuse Harness for open or short between injector and fuse : Repair harness or connectors.
5. CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Disconnect ECM harness connector. Check harness continuity between injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42, 44, 63. Refer to «WIRING DIAGRAM»(ref-169809-S14608879642004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 6. NG: Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK INJECTOR Refer to «COMPONENT INSPECTION»(ref-169809-S10984362642004121600000) . OK or NG OK: GO TO 7. NG: Replace injector.
7. CHECK INTERMITTENT INCIDENT Refer to «TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT»(ref-169472-S11178043272004120900000) . : INSPECTION END

Scheme 968

1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure. Resistance: 11.1 - 14.5 ohms [at 10 - 60°C (50 - 140°F)]

For complete wiring diagrams, see SYSTEM WIRING DIAGRAMS - TITAN article.

Scheme 969

Specification data are reference values and are measured between each terminal and ground.

Scheme 970

Scheme 971

Scheme 972

Scheme 973

Scheme 974

Scheme 975

Scheme 976

1. CHECK OVERALL FUNCTION Turn ignition switch ON. Pinch fuel feed hose with two fingers. Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON. OK or NG OK INSPECTION END NG: GO TO 2.
2. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I Turn ignition switch OFF. Disconnect ECM harness connector. Turn ignition switch ON. Check voltage between ECM terminal 113 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 5 . NG: GO TO 3.
3. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II Turn ignition switch OFF. Disconnect IPDM E/R harness connector E122. Turn ignition switch ON. Check voltage between IPDM E/R terminal 46 and ground with CONSULT-II or tester. Voltage: Battery voltage OK or NG OK: GO TO 4. NG: GO TO 12 .
4. DETECT MALFUNCTIONING PART Check the following. Harness for open or short between IPDM E/R and ECM : Repair harness or connectors.
5. CHECK CONDENSER POWER SUPPLY CIRCUIT Turn ignition switch OFF. Reconnect all harness connectors disconnected. Disconnect condenser harness connector. Turn ignition switch ON. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester. Voltage: Battery voltage should exist for 1 second after ignition switch is turned ON. Also check harness for short to ground and short to power. OK or NG OK: GO TO 8 . NG: GO TO 6.
6. CHECK 15A FUSE Turn ignition switch OFF. Disconnect 15A fuse. Check 15A fuse. OK or NG OK: GO TO 7. NG: Replace fuse.
7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II FOR OPEN AND SHORT Disconnect IPDM E/R harness connector E119. Check harness continuity between IPDM E/R terminal 13 and condenser terminal 1. Refer to «WIRING DIAGRAM»(ref-169809-S20124715472004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 12 . NG: Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT Check harness continuity between condenser terminal 1 and ground. Refer to «WIRING DIAGRAM»(ref-169809-S20124715472004121600000) . Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 9. NG: Repair open circuit or short to power in harness or connectors.
9. CHECK CONDENSER Refer to «COMPONENT INSPECTION»(ref-169809-S35092264802004121600000) . OK or NG OK: GO TO 10. NG: Replace condenser.
10. CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Disconnect "fuel level sensor unit and fuel pump" harness connector. Disconnect IPDM E/R harness connector E119. Check harness continuity between IPDM E/R terminal 13 and "fuel level sensor unit and fuel pump" terminal 1, "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to «WIRING DIAGRAM»(ref-169809-S20124715472004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 12. NG: GO TO 11.
11. DETECT MALFUNCTIONING PART Check the following. Harness connectors E41, C1 Harness for open or short between fuel pump and IPDM E/R Harness for open or short between fuel pump and ground : Repair open circuit or short to ground or short to power in harness or connectors.
12. CHECK INTERMITTENT INCIDENT Refer to «TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT»(ref-169472-S11178043272004120900000) . OK or NG OK: Replace IPDM E/R. NG: Repair or replace harness or connectors.

Scheme 977

1. Disconnect "fuel level sensor unit and fuel pump" harness connector.
2. Check resistance between fuel level sensor unit and fuel pump terminals 1 and 3. Resistance: 0.2 - 5.0 ohms [at 25°C (77°F)]

Scheme 978

Scheme 979

1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals as 1 and 2.

For complete wiring diagrams, see SYSTEM WIRING DIAGRAMS - TITAN article.

Scheme 980

Specification data are reference values and are measured between each terminal and ground.

Scheme 981

Scheme 982

Scheme 983

Scheme 984

1. CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION Start engine and warm it up to normal operating temperature. Turn A/C switch and blower switch ON. Check voltage between ECM terminal 70 and ground with CONSULT-II or tester. Voltage: 1.0 - 4.0V OK or NG OK : INSPECTION END NG: GO TO 2.
2. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT Turn A/C switch and blower switch OFF. Stop engine. Disconnect refrigerant pressure sensor harness connector. Turn ignition switch ON. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester. Voltage: Approximately 5V OK or NG OK: GO TO 4. NG: GO TO 3.
3. DETECT MALFUNCTIONING PART Check the following. Harness connectors E5, F14 Harness for open or short between ECM and refrigerant pressure sensor : Repair harness or connectors.
4. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Disconnect ECM harness connector. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67. Refer to «WIRING DIAGRAM»(ref-169809-S00245556302004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 6. NG: GO TO 5.
5. DETECT MALFUNCTIONING PART Check the following. Harness connectors E5, F14 Harness for open or short between ECM and refrigerant pressure sensor : Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2. Refer to «WIRING DIAGRAM»(ref-169809-S00245556302004121600000) . Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 8. NG: GO TO 7.
7. DETECT MALFUNCTIONING PART Check the following. Harness connectors E5, F14 Harness for open or short between ECM and refrigerant pressure sensor : Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT Refer to «TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT»(ref-169472-S11178043272004120900000) . OK or NG OK Replace refrigerant pressure sensor. NG: Repair or replace.

For complete wiring diagrams, see SYSTEM WIRING DIAGRAMS - TITAN article.

Scheme 985

Scheme 986

Scheme 987

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.

The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank.

The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases.

EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.

Scheme 988

Scheme 989