DETAILED FLOW
- GET INFORMATION FOR SYMPTOM Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred). GO TO 2
- CHECK DTC Check DTC. Perform the following procedure if DTC is displayed. Record DTC and freeze frame data. Erase DTC. Study the relationship between the cause detected by DTC and the symptom described by the customer. Check related service bulletins for information. Is any symptom described and any DTC detected? Symptom is described, DTC is displayed: GO TO 3 Symptom is described, DTC is not displayed: GO TO 4 Symptom is not described, DTC is displayed: GO TO 5
- CONFIRM THE SYMPTOM Confirm the symptom described by the customer. Connect CONSULT-III to the vehicle in "DATA MONITOR" mode and check real time diagnosis results. Verify relationship between the symptom and the condition when the symptom is detected. GO TO 5
- CONFIRM THE SYMPTOM Confirm the symptom described by the customer. Connect CONSULT-III to the vehicle in "DATA MONITOR" mode and check real time diagnosis results. Verify relationship between the symptom and the condition when the symptom is detected. GO TO 6
- PERFORM DTC CONFIRMATION PROCEDURE Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again. At this time, always connect CONSULT-III to the vehicle, and check diagnostic results in real time. If two or more DTCs are detected, refer to " «DTC INDEX»(ref-382186-S42350264022011011400000) " and determine trouble diagnosis order. NOTE: Freeze frame data is useful if the DTC is not detected. Perform Component Function Check if DTC Confirmation Procedure is not included in this article. This simplified check procedure is an effective alternative though DTC cannot be detected during this check. If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC Confirmation Procedure. Is DTC detected? YES: GO TO 8 NO: Refer to " «INTERMITTENT INCIDENT»(ref-382152-S05830002852011011400000) ".
- PERFORM BASIC INSPECTION Perform a basic inspection of the IPDM E/R. Inspection End: GO TO 7
- DETECT MALFUNCTIONING SYSTEM BY SYMPTOM Detect malfunctioning system according to the confirmed symptom in step 4 , and determine the trouble diagnosis order based on possible causes and symptom. GO TO 8
- DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE Inspect according to Diagnostic Procedure of the system. NOTE: The Diagnostic Procedure described based on open circuit inspection. A short circuit inspection is also required for the circuit check in the Diagnostic Procedure. Is malfunctioning part detected? YES: GO TO 9 NO: Check voltage of related BCM terminals using CONSULT-III.
- REPAIR OR REPLACE THE MALFUNCTIONING PART Repair or replace the malfunctioning part. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replacement. Check DTC. If DTC is displayed, erase it. GO TO 10
- FINAL CHECK When DTC was detected in step 2 , perform DTC Confirmation Procedure or Component Function Check again, and then check that the malfunction have been fully repaired. When symptom was described from the customer, refer to confirmed symptom in step 3 or 4 and check that the symptom is not detected. Is the inspection result normal? YES: Inspection End. NO (DTC is detected): GO TO 8 NO (Symptom remains): GO TO 6
Scheme 88
COOLING FAN CONTROL
IPDM E/R controls the cooling fan according to the status of the cooling fan speed request signal received from ECM via CAN communication. Refer to " SYSTEM DESCRIPTION ".
Scheme 89
OUTLINE
- IPDM E/R incorporates a power consumption control function that reduces the power consumption according to the vehicle status.
- IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN communication.
Normal mode (wake-up)
- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.
Low power consumption mode (sleep)
- Low power consumption control is active.
- CAN transmission is stopped.
SLEEP MODE ACTIVATION
- IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communication. Front wiper fail-safe operation Outputting signals to actuators Switches or relays operating Auto active test is starting Emergency OFF Output requests are being received from control units via CAN communication.
- IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.
DATA MONITOR
Monitor item
| Monitor Item [Unit] | MAIN SIGNALS | Description |
|---|---|---|
| MOTOR FAN REQ [1/2/3/4] | X | Displays the status of the cooling fan speed request signal received from ECM via CAN communication. |
| A/C COMP REQ [OFF/ON] | X | Displays the status of the A/C request signal received from AV control unit via CAN communication. |
| TAIL&CLR REQ [OFF/ON] | X | Displays the status of the position light request signal received from BCM via CAN communication. |
| HL LO REQ [OFF/ON] | X | Displays the status of the low beam request signal received from BCM via CAN communication. |
| HL HI REQ [OFF/ON] | X | Displays the status of the high beam request signal received from BCM via CAN communication. |
| FR FOG REQ [OFF/ON] | X | Displays the status of the front fog lamp request signal received from BCM via CAN communication. |
| FR WIP REQ [STOP/1LOW/LOW/HI] | X | Displays the status of the front wiper request signal received from BCM via CAN communication. |
| WIP AUTO STOP [STOP P/ACT P] | X | Displays the status of the front wiper auto stop signal judged by IPDM E/R. |
| WIP PROT [OFF/Block] | X | Displays the status of the front wiper fail-safe operation judged by IPDM E/R. |
| ST RLY REQ [OFF/ON] | Displays the status of the starter request signal received from ECM via CAN communication. | |
| IGN RLY [OFF/ON] | X | Displays the status of the ignition relay judged by IPDM E/R. |
| RR DEF REQ [OFF/ON] | X | Displays the status of the rear defogger request signal received from AV control unit via CAN communication. |
| OIL P SW [OPEN/CLOSE] | Displays the status of the oil pressure switch judged by IPDM E/R. | |
| DTRL REQ [OFF] | NOTE: This item is displayed, but cannot be monitored. | |
| THFT HRN REQ [OFF/ON] | Displays the status of the theft warning horn request signal received from BCM via CAN communication. | |
| HORN CHIRP [OFF/ON] | Displays the status of the horn reminder signal received from BCM via CAN communication. |
| NOTE |
|---|
| This item is displayed, but cannot be monitored. |
DATA MONITOR REFERENCE
PHYSICAL VALUES
CONNECTOR TERMINAL REFERENCE Terminal Wire color Signal name Signal input/output Measuring condition Reference value (Approx.) Ignition switch Operation or condition 1 B/Y Battery power supply Input OFF - Battery voltage 2 R Battery power supply Input OFF - Battery voltage 3 BR ECM relay Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 4 W/L ECM relay Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 6 L Throttle control motor relay Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 7 W/B ECM relay control Input - Ignition switch ON or START 0V Ignition switch OFF or ACC Battery voltage 8 R/B Fuse 54 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 10 G Fuse 45 (Canada only) Output ON Daytime light system active 0V Daytime light system inactive Battery voltage 11 Y/B A/C compressor Output ON or START A/C switch ON or defrost A/C switch Battery voltage A/C switch OFF or defrost A/C switch 0V 12 L/W Ignition switch supplied power Input - OFF or ACC 0V ON or START Battery voltage 13 B/Y Fuel pump relay Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 14 Y/R Fuse 49 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 15 LG/B Fuse 50 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 16 G Fuse 51 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 17 W Fuse 55 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 19 W/R Starter motor Output START - Battery voltage 21 BR Ignition switch supplied power Input - OFF or ACC 0V START Battery voltage 22 G Battery power supply Output OFF - Battery voltage 23 GR/W Door mirror defogger output signal Output - When rear defogger switch is ON Battery voltage When raker defogger switch is OFF 0V 24 L Cooling fan relay Output - Conditions correct for cooling fan operation Battery voltage Conditions not correct for cooling fan operation 0V 27 W/B Fuse 38 (With trailer tow) Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 30 W Fuse 53 Output - Ignition switch ON or START Battery voltage Ignition switch OFF or ACC 0V 32 L Wiper low speed signal Output ON or START Wiper switch OFF Battery voltage LO or INT 0V 35 L/B Wiper high speed signal Output ON or START Wiper switch OFF, LO, INT Battery voltage HI 0V 37 Y Power generation command signal Output - Ignition switch ON 40% is set on "Active test," "ALTERNATOR DUTY" of "ENGINE" 40% is set on "Active test," "ALTERNATOR DUTY" of "ENGINE" 38 B Ground Input - - 0V 39 L CAN-H - ON - - 40 P CAN-L - ON - - 42 GR Oil pressure switch Input - Engine running Battery voltage Engine stopped 0V 43 L/Y Wiper auto stop signal Input ON or START Wiper switch OFF, LO, INT Battery voltage 44 BR Daytime light relay control (Canada only) Input ON Daytime light system active 0V Daytime light system inactive Battery voltage 45 G/W Horn relay control Input ON When door locks are operated using keyfob or Intelligent Key (if equipped) (OFF --> ON) (1) Battery voltage --> 0V 46 GR Fuel pump relay control Input - Ignition switch ON or START 0V Ignition switch OFF or ACC Battery voltage 47 O Throttle control motor relay control Input - Ignition switch ON or START 0V Ignition switch OFF or ACC Battery voltage 48 B/R Starter relay (inhibit switch) Input ON or START Selector lever in "P" or "N" 0V Selector lever any other position Battery voltage 49 R/L Trailer tow relay (With trailer tow) Illumination (Without trailer tow) Output ON Lighting switch must be in the 1st position OFF 0V ON Battery voltage 50 W/R Front fog lamp (LH) Output ON or START Lighting switch must be in the 2nd position (LOW beam is ON) and the front fog lamp switch OFF 0V ON Battery voltage 51 W/R Front fog lamp (RH) Output ON or START Lighting switch must be in the 2nd position (LOW beam is ON) and the front fog lamp switch OFF 0V ON Battery voltage 52 L LH low beam headlamp Output - Lighting switch in 2nd position Battery voltage 54 R/Y RH low beam headlamp Output - Lighting switch in 2nd position Battery voltage 55 G LH high beam headlamp Output - Lighting switch in 2nd position and placed in HIGH or PASS position Battery voltage 56 Y (With DTRL) RH high beam headlamp Output - Lighting switch in 2nd position and placed in HIGH or PASS position Battery voltage 56 L/W (Without DTRL) RH high beam headlamp Output Lighting switch in 2nd position and placed in HIGH or PASS position Battery voltage 57 R/L Parking, license, and tail lamp Output ON Lighting switch 1st position OFF 0V ON Battery voltage 59 B Ground Input - - 0V 60 B/W Rear window defogger relay Output ON or START Rear defogger switch ON Battery voltage Rear defogger switch OFF 0V 61 BR Fuse 32 (With trailer tow) Output OFF - Battery voltage (1) When horn reminder is ON
Scheme 90
Scheme 91
Scheme 92
Scheme 93
Scheme 94
Scheme 95
Scheme 96
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM
| Control part | Fail-safe in operation |
|---|---|
| Cooling fan | Turns ON the cooling fan relay when the ignition switch is turned ON Turns OFF the cooling fan relay when the ignition switch is turned OFF |
FAIL-SAFE REFERENCE
If No CAN Communication Is Available With BCM
| Control part | Fail-safe in operation |
|---|---|
| Headlamp | Turns ON the headlamp low relay when the ignition switch is turned ON Turns OFF the headlamp low relay when the ignition switch is turned OFF Headlamp high LH/RH relays OFF |
| Parking lamps License plate lamps Tail lamps | Turns ON the tail lamp relay when the ignition switch is turned ON Turns OFF the tail lamp relay when the ignition switch is turned OFF |
| Front wiper | The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed. The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated while the front wiper is set in the INT mode and the front wiper motor is operating. |
| Rear window defogger | Rear window defogger relay OFF |
| A/C compressor | A/C relay OFF |
| Front fog lamps | Front fog lamp relay OFF |
FAIL-SAFE REFERENCE
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
- IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
- IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation coil circuit.
- If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF. IGNITION RELAY MALFUNCTION DETECTION FUNCTION Ignition switch Ignition relay Tail lamp relay ON ON - OFF OFF
Note. The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper after repeating a front wiper 10 second activation and 20 second stop five times.
| Ignition switch | Front wiper switch | Auto stop signal |
|---|---|---|
| ON | OFF | Front wiper stop position signal cannot be input 10 seconds. |
| ON | The signal does not change for 10 seconds. |
IGNITION SWITCH REFERENCE
Note. This operation status can be confirmed on the IPDM E/R "DATA MONITOR" that displays "Block" for the item "WIP PROT" while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains active for 90 seconds.
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS AIRBAG article and SEAT BELTS article.
| WARNING | To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS AIRBAG . Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this article. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. |
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
| WARNING | When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. |
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
Note. This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYSTEM). Remove and install all control units after disconnecting both battery cables with the ignition knob in the "LOCK" position. Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation.