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 and SEAT BELTS of this Service Information.
| WARNING | Always observe the following items for preventing accidental activation. To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that 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 " SRS AIR BAG ". Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Information. 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 | Always observe the following items for preventing accidental activation. When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, never 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. |
Scheme 123
- When removing the 12V battery terminal, turn OFF the ignition switch and wait at least 30 seconds. NOTE: ECU may be active for several tens of seconds after the ignition switch is turned OFF. If the battery terminal is removed before ECU stops, then a DTC detection error or ECU data corruption may occur.
- For vehicles with the 2-batteries, be sure to connect the main battery and the sub battery before turning ON the ignition switch. NOTE: If the ignition switch is turned ON with any one of the terminals of main battery and sub battery disconnected, then DTC may be detected.
- After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC. NOTE: The removal of 12V battery may cause a DTC detection error.
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Scheme 125
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 operation |
|---|---|
| Cooling fan | Turns ON the cooling fan relay-2 and the cooling fan relay-3 when the ignition switch is turned ON (Cooling fan operates at HI) Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3 when the ignition switch is turned OFF (Cooling fan does not operate) |
| A/C compressor | A/C relay OFF |
| Alternator | Outputs the power generation command signal (PWM signal) 0% |
If No CAN Communication Is Available With BCM
| Control part | Fail-safe 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 relay OFF |
| Parking lamp License plate lamp Illumination Tail lamp Side marker lamp | 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 motor | 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 AUTO mode and the front wiper motor is operating. Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is activated while front wiper motor is operated and wiper stop in the other than stop position. |
| Front fog lamp | Front fog lamp relay OFF |
| Horn | Horn relay OFF |
| Ignition relay | The status just before activation of fail-safe is maintained. |
| Starter motor | Starter control relay OFF |
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 and daytime running light relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF. Voltage judgment IPDM E/R judgment Operation Ignition relay contact side Ignition relay excitation coil side ON ON Ignition relay ON normal - OFF OFF Ignition relay OFF normal - ON OFF Ignition relay ON stuck Detects DTC "B2098: IGN RELAY ON" Turns ON the tail lamp relay for 10 minutes OFF ON Ignition relay OFF stuck Detects DTC "B2099: IGN RELAY OFF"
FRONT WIPER PROTECTION FUNCTION
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper after repeating a front wiper 10 seconds activation and 20 seconds stop five times.
| Ignition switch | Front wiper switch | Front wiper stop position signal |
|---|---|---|
| ON | OFF | The front wiper stop position signal (stop position) cannot be input for 10 seconds. |
| ON | The front wiper stop position signal does not change for 10 seconds. |
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.
Scheme 126
DATA MONITOR
Note. The following table includes information (items) inapplicable to this vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.
| Monitor Item [Unit] | MAIN SIGNALS | Description |
|---|---|---|
| MOTOR FAN REQ [1/2/3/4] | X | Displays the value of the cooling fan speed signal received from ECM via CAN communication. |
| AC COMP REQ [Off/On] | X | Displays the status of the A/C compressor request signal received from ECM 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 light 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 stop position 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. |
| IGN RLY1-REQ [Off/On] | Displays the status of the ignition switch ON signal received from BCM via CAN communication. | |
| IGN RLY [Off/On] | X | Displays the status of the ignition relay judged by IPDM E/R. |
| PUSH SW [Off/On] | Displays the status of the push-button ignition switch judged by IPDM E/R. | |
| INTER/NP SW [Off/On] | Displays the status of the shift position judged by IPDM E/R. | |
| ST RLY CONT [Off/On] | Displays the status of the starter relay status signal received from BCM via CAN communication. | |
| IHBT RLY-REQ [Off/On] | Displays the status of the starter control relay signal received from BCM via CAN communication. | |
| ST/INHI RLY [Off/ST/INHI/UNKWN] | Displays the status of the starter relay and starter control relay judged by IPDM E/R. | |
| DETENT SW [Off/On] | Displays the status of the CVT shift selector (detention switch) judged by IPDM E/R. | |
| S/L RLY-REQ [Off/On] | NOTE: The item is indicated, but not monitored. | |
| S/L STATE [LOCK/UNLK/UNKWN] | NOTE: The item is indicated, but not monitored. | |
| DTRL REQ [Off/On] | Displays the status of the daytime running light request signal received from BCM via CAN communication. NOTE: This item is monitored only on the vehicle with daytime running light system. | |
| OIL P SW [Open/Close] | Displays the status of the oil pressure switch judged by IPDM E/R. | |
| HOOD SW [Off/On] | NOTE: The item is indicated, but not monitored. | |
| HL WASHER REQ [Off/On] | NOTE: The item is indicated, but not 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. | |
| CRNRNG LMP REQ [Off/On] | NOTE: The item is indicated, but not monitored. |
| NOTE |
|---|
| The item is indicated, but not monitored. |
| NOTE |
|---|
| The item is indicated, but not monitored. |
| NOTE |
|---|
| This item is monitored only on the vehicle with daytime running light system. |
| NOTE |
|---|
| The item is indicated, but not monitored. |
| NOTE |
|---|
| The item is indicated, but not monitored. |
| NOTE |
|---|
| The item is indicated, but not monitored. |
PHYSICAL VALUES
Terminal No. (Wire color) Description Condition Value (Approx.) + - Signal name Input/Output 1 (R) Ground Battery power supply Input Ignition switch OFF 6 - 16 V 2 (L) Ground Battery power supply Input Ignition switch OFF 6 - 16 V 4 (LG) Ground Front wiper LO Output Ignition switch ON Front wiper switch OFF 0 - 1 V Front wiper switch LO 9 - 16 V 5 (Y) Ground Front wiper HI Output Ignition switch ON Front wiper switch OFF 0 - 1 V Front wiper switch HI 9 - 16 V 6 (G) Ground Daytime running light relay power supply Input Ignition switch OFF 6 - 16 V 7 (BR) Ground Illuminations Output Lighting switch OFF 0 - 1 V Lighting switch 1ST 9 - 16 V 10 (P) Ground ECM relay power supply Output Ignition switch OFF (More than a few seconds after turning ignition switch OFF) 0 - 1 V Ignition switch ON Ignition switch OFF (For a few seconds after turning ignition switch OFF) 6 - 16 V 12 (B) Ground Ground - Ignition switch ON 0 - 1 V 13 (G) Ground Fuel pump power supply Output Approximately 1 second or more after turning the ignition switch ON 0 - 1 V Approximately 1 second after turning the ignition switch ON Engine running 6 - 16 V 15 (L) Ground Ignition power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 16 (R) Ground Front wiper stop position Input Ignition switch ON Front wiper stop position 0 - 1 V Any position other than front wiper stop position 9 - 16 V 18 (P) Ground Ignition power supply No. 2 Input Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 19 (V) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 20 (W) Ground Ambient sensor ground Output Ignition switch ON 0 - 1 V 21 (O) Ground Ambient sensor Input Ignition switch ON 0 - 4.8 V NOTE: Changes depending to ambient temperature 22 (SB) Ground Refrigerant pressure sensor ground Output Engine running Warm-up condition Idle speed 0 - 1 V 23 (GR) Ground Refrigerant pressure sensor Output Engine running Warm-up condition Both A/C switch and blower fan motor switch ON (Compressor operates) 1 - 4 V 24 (G) Ground Refrigerant pressure sensor power supply Input Ignition switch ON 5 V 25 (GR) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 27 (BR) Ground Ignition relay monitor Input Ignition switch OFF or ACC 6 - 16 V Ignition switch ON 0 - 1 V 28 (G) Ground Push-button ignition switch Input Press the push-button ignition switch 0 - 1 V Release the push-button ignition switch 6 - 16 V 30 (LG) Ground Starter relay control Input Ignition switch ON Selector lever in any position other than P or N 6 - 16 V Selector lever P or N 0 - 1 V 34 (O) Ground Cooling fan relay-3 control Input Cooling fan stopped 6 - 16 V Cooling fan at HI operation 0 - 1 V 35 (P) Ground Cooling fan relay-1 power supply Input Cooling fan stopped 6 - 16 V Cooling fan at LO operation 4 - 8 V 36 (G) Ground Battery power supply Input Ignition switch OFF 6 - 16 V 38 (GR) Ground Cooling fan relay-2 power supply Output Cooling fan not operation 0 - 1 V Cooling fan at LO operation 4 - 8 V Cooling fan at HI operation 9 - 16 V 39 (P) - CAN-L Input/Output - - 40 (L) - CAN-H Input/Output - - 41 (B) Ground Ground - Ignition switch ON 0 - 1 V 42 (SB) Ground Cooling fan relay-2 control Input Cooling fan stopped 9 - 16 V Cooling fan at MID operation Cooling fan at HI operation 0 - 1 V 43 (LG) Ground CVT shift selector (Detention switch) Input Ignition switch ON Press the selector button (selector lever P) Selector lever in any position other than P 9 - 16 V Release the selector button (selector lever P) 0 - 1 V 44 (W) Ground Horn relay control Input The horn is deactivated 9 - 16 V The horn is activated 0 - 1 V 45 (Y) Ground Horn switch Input The horn is deactivated 9 - 16 V The horn is activated 0 - 1 V 46 (O) Ground Starter relay control Input At engine cranking 0 - 1 V Other than at engine cranking 6 - 16 V 48 (W) Ground A/C relay power supply Output Engine running A/C switch OFF 0 - 1 V A/C switch ON (A/C compressor is operating) 9 - 16 V 49 (R/B) Ground ECM relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 51 (LG) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 52 (Y/G) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 53 (R/W) Ground ECM relay power supply Output Ignition switch OFF (More than a few seconds after turning ignition switch OFF) 0 - 1 V Ignition switch ON Ignition switch OFF (For a few seconds after turning ignition switch OFF) 6 - 16 V 54 (G/W) Ground Throttle control motor relay power supply Output Ignition switch OFF (More than a few seconds after turning ignition switch OFF) 0 - 1 V Ignition switch ON Ignition switch OFF (For a few seconds after turning ignition switch OFF) 6 - 16 V 55 (W/L) Ground ECM power supply Output Ignition switch OFF 6 - 16 V 56 (R/Y) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 57 (O) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 58 (Y) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 69 (W/B) Ground ECM relay control Output Ignition switch OFF (More than a few seconds after turning ignition switch OFF) 6 - 16 V Ignition switch ON Ignition switch OFF (For a few seconds after turning ignition switch OFF) 0 - 1 V 70 (O) Ground Throttle control motor relay control Output Ignition switch OFF or ACC 6 - 16 V Ignition switch ON 0 - 1 V 71 (P) Ground Cranking request Output Ignition switch OFF 0 - 1 V Ignition switch ON Selector lever P or N Selector lever in any position other than P or N 9 - 16 V Engine running 72 (R/B) Ground Starter relay control Input Ignition switch ON Selector lever in any position other than P or N 6 - 16 V Selector lever P or N 0 - 1 V 75 (LG) Ground Oil pressure switch Input Engine stopped 0 - 1 V Engine running 9 - 16 V 76 (GR) Ground Power generation command signal Output Ignition switch ON 6.6 V 40% is set on "ACTIVE TEST", "ALTERNATOR DUTY" of "ENGINE" 4.0 V 80% is set on "ACTIVE TEST", "ALTERNATOR DUTY" of "ENGINE" 1.3 V 77 (B) Ground Fuel pump relay control Output Approximately 1 second after turning the ignition switch ON Engine running 0 - 1 V Approximately 1 second or more after turning the ignition switch ON 6 - 16 V 80 (B) Ground Starter motor Output Other than at engine cranking 0 - 1 V At engine cranking 6 - 16 V 83 (R) Ground Headlamp LO (RH) Output Lighting switch OFF 0 - 1 V Lighting switch 2ND or AUTO (light is illuminated) 9 - 16 V 84 (L) Ground Headlamp LO (LH) Output Lighting switch OFF 0 - 1 V Lighting switch 2ND or AUTO (light is illuminated) 9 - 16 V 86 (SB) Ground Front fog lamp (RH) Output Lighting switch 2ND or AUTO (light is illuminated) Front fog lamp switch ON 9 - 16 V Front fog lamp switch OFF 0 - 1 V 87 (Y) Ground Front fog lamp (LH) Output Lighting switch 2ND or AUTO (light is illuminated) Front fog lamp switch ON 9 - 16 V Front fog lamp switch OFF 0 - 1 V 88 (BR) Ground Ignition relay power supply Output Ignition switch OFF or ACC 0 - 1 V Ignition switch ON 6 - 16 V 89 (V) Ground Headlamp HI (RH) Output Lighting switch 2ND or AUTO (light is illuminated) Lighting switch HI or PASS 9 - 16 V Lighting switch other than HI and PASS 0 - 1 V 90 (G) Ground Headlamp HI (LH) Output Lighting switch 2ND or AUTO (light is illuminated) Lighting switch HI or PASS 9 - 16 V Lighting switch other than HI and PASS 0 - 1 V 91 (LG) Ground Front combination lamp RH Output Lighting switch OFF 0 - 1 V Lighting switch 1ST 9 - 16 V 92 (P) Ground Front combination lamp LH Output Lighting switch OFF 0 - 1 V Lighting switch 1ST 9 - 16 V 93 (W) Ground Headlamp aiming motor RH Output Lighting switch OFF 0 - 1 V Lighting switch 1ST 9 - 16 V 94 (O) Ground Headlamp aiming motor LH Output Lighting switch OFF 0 - 1 V Lighting switch 1ST 9 - 16 V 99 (Y) Ground Ambient sensor ground Output Ignition switch ON 0 - 1 V 100 (V) Ground Ambient sensor Input Ignition switch ON 0 - 4.8 V NOTE: Changes depending to ambient temperature 101 (O) Ground Refrigerant pressure sensor ground Output Engine running Warm-up condition Idle speed 0 - 1 V 102 (G) Ground Refrigerant pressure sensor Output Engine running Warm-up condition Both A/C switch and blower fan motor switch ON (Compressor operates) 1 - 4 V 103 (BR) Ground Refrigerant pressure sensor power supply Input Ignition switch ON 5 V 105 (R) Ground Daytime running light relay control Output Daytime running light deactivated 9 - 16 V Daytime running light activated 0 - 1 V
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Scheme 128
Scheme 129
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 operation |
|---|---|
| Cooling fan | Turns ON the cooling fan relay-2 and the cooling fan relay-3 when the ignition switch is turned ON (Cooling fan operates at HI) Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3 when the ignition switch is turned OFF (Cooling fan does not operate) |
| A/C compressor | A/C relay OFF |
| Alternator | Outputs the power generation command signal (PWM signal) 0% |
If No CAN Communication Is Available With BCM
| Control part | Fail-safe 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 relay OFF |
| Parking lamp License plate lamp Illumination Tail lamp Side marker lamp | 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 motor | 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 AUTO mode and the front wiper motor is operating. Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is activated while front wiper motor is operated and wiper stop in the other than stop position. |
| Front fog lamp | Front fog lamp relay OFF |
| Horn | Horn relay OFF |
| Ignition relay | The status just before activation of fail-safe is maintained. |
| Starter motor | Starter control relay OFF |
- 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 and daytime running light relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
| Voltage judgment | IPDM E/R judgment | Operation | |
|---|---|---|---|
| Ignition relay contact side | Ignition relay excitation coil side | ||
| ON | ON | Ignition relay ON normal | |
| OFF | OFF | Ignition relay OFF normal | |
| ON | OFF | Ignition relay ON stuck | Detects DTC "B2098: IGN RELAY ON" Turns ON the tail lamp relay for 10 minutes |
| OFF | ON | Ignition relay OFF stuck | Detects DTC "B2099: IGN RELAY OFF" |
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper after repeating a front wiper 10 seconds activation and 20 seconds stop five times.
| Ignition switch | Front wiper switch | Front wiper stop position signal |
|---|---|---|
| ON | OFF | The front wiper stop position signal (stop position) cannot be input for 10 seconds. |
| ON | The front wiper stop position signal does not change for 10 seconds. |
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.
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains active for 90 seconds.