Relay Control System Diagram. Scheme 96
System Description
IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input signals from various sensors and the request signals received from control units via CAN communication.
| CAUTION | IPDM E/R integrated relays cannot be removed. |
| Control relay | Input/output | Transmit unit | Control part | Reference |
|---|---|---|---|---|
| Headlamp low relay | Low beam request signal | BCM (CAN) | Headlamp low Aiming motor (With xenon headlamp) | FUNCTION DIAGNOSIS (Xenon headlamp) FUNCTION DIAGNOSIS (Halogen headlamp) |
| Headlamp high relay RH Headlamp high relay LH | High beam request signal | Headlamp high | ||
| Front fog lamp relay | Front fog light request signal | BCM (CAN) | Front fog lamp NOTE: With front fog lamp system | FRONT FOG LAMP SYSTEM |
| Tail lamp relay | Position light request signal | BCM (CAN) | Parking lamp License plate lamp Tail lamp | PARKING, LICENSE PLATE AND TAIL LAMPS SYSTEM |
| Illuminations | ILLUMINATION CONTROL SYSTEM | |||
| Front wiper relay Front wiper high relay | Front wiper request signal | BCM (CAN) | Front wiper | FUNCTION DIAGNOSIS |
| Front wiper auto stop signal | Front wiper motor | |||
| Rear window defogger relay | Rear window defogger switch signal | BCM (CAN) | Rear window defogger | FUNCTION DIAGNOSIS |
| Starter relay | Ignition switch START signal Park/neutral position switch signal | Ignition switch Park/neutral position switch | Starter motor | FUNCTION DIAGNOSIS (With Intelligent Key) SEC-169 (Without Intelligent Key) |
| Cooling fan relay-1 Cooling fan relay-2 Cooling fan relay-3 Cooling fan relay-4 Cooling fan relay-5 | Cooling fan speed request signal | ECM (CAN) | Cooling fan | COOLING FAN CONTROL (For California) COOLING FAN CONTROL [For USA (federal) and Canada] COOLING FAN CONTROL (For Mexico) |
| A/C relay | A/C compressor request signal | ECM (CAN) | A/C compressor (Magnet clutch) | FUNCTION DIAGNOSIS |
| Ignition relay | Ignition switch ON signal | Ignition switch | Each control unit, sensor, actuator and relay (Ignition power supply) | B2099 IGNITION RELAY OFF STUCK |
| Horn relay | Horn request signal | BCM (CAN) | Horn | Vehicle security system SEC-20 (With Intelligent Key) SEC-173 (Without Intelligent Key) Panic alarm DLK-19 (With Intelligent Key) DLK-316 (Without Intelligent Key) Horn reminder DLK-19 (With Intelligent Key) DLK-316 (Without Intelligent Key) |
| Daytime running light relay NOTE: With daytime running light system | Daytime running light request signal | BCM (CAN) | Headlamp HI (Daytime running light operation) | DAYTIME RUNNING LIGHT SYSTEM |
| NOTE |
|---|
| With front fog lamp system |
| NOTE |
|---|
| With daytime running light system |
SYSTEM REFERENCE
Identifying Relay Control System Components Location. Scheme 97
Signal Buffer System Diagram. Scheme 98
- IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM and ECM via CAN communication. Refer to " «WARNING LAMPS/INDICATOR LAMPS : SYSTEM DIAGRAM»(ref-295113-S12581775682008081400000) ".
- IPDM E/R reads the status of the hood switch and transmits the hood switch signal to BCM via CAN communication. Refer to " «SYSTEM DIAGRAM»(ref-295136-S24450254532008081400000) " (With Intelligent Key) or " «SYSTEM DIAGRAM»(ref-295136-S05381998982008081400000) " (Without Intelligent Key).
Identifying Signal Buffer System Components Location. Scheme 99
Power Consumption Control System Diagram. Scheme 100
Wake-up operation
- IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start. Ignition switch ON The hood switch status changes. (For Mexico) An output request is received from a control unit via CAN communication.
Identifying Power Consumption Control System Components Location. Scheme 101
Description
In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.
- Oil pressure warning lamp
- Rear window defogger
- Front wiper (LO, HI)
- Parking lamps
- License plate lamps
- Tail lamps
- Front fog lamps
- Headlamps (LO, HI)
- A/C compressor (magnet clutch)
- Cooling fan (LO, MID, HI)
Operation procedure
- Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper operation) NOTE: When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
- Turn ignition switch OFF.
- Turn the ignition switch ON, and within 20 seconds, press the driver door switch 10 times. Then turn the ignition switch OFF. CAUTION: Close passenger door.
- Turn the ignition switch ON within 10 seconds. Then the horn sounds once and the auto active test starts. NOTE: Only a vehicle with the vehicle security system, the horn sounds.
- The oil pressure warning lamp starts blinking when the auto active test starts.
- After a series of the following operations is repeated 3 times, auto active test is completed.
Note. When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
| CAUTION | If auto active test mode cannot be actuated, check door switch system. Never start the engine. |
Inspection in auto active test mode
When auto active test mode is actuated, the following 6 steps are repeated 3 times.
Identifying Vehicle Components (Auto Active Test Mode). Scheme 102
| Operation sequence | Inspection location | Operation |
|---|---|---|
| A | Oil pressure warning lamp | Blinks continuously during operation of auto active test. |
| 1 | Rear window defogger | 10 seconds |
| 2 | Front wiper | LO for 5 seconds --> HI for 5 seconds |
| 3 | Parking lamps License plate lamps Tail lamps Front fog lamps Headlamps HI (daytime running light operation) (1) | 10 seconds |
| 4 | Headlamps | LO <=> HI 5 times |
| 5 | A/C compressor (magnet clutch) | ON <=> OFF 5 times |
| 6 | Cooling fan | LO for 5 seconds <-- MID for 3 seconds <-- HI for 2 seconds |
| NOTE: (1) With daytime running light system | ||
| NOTE |
|---|
| (1) With daytime running light system |
| (1) | With daytime running light system |
OPERATION SEQUENCE REFERENCE
Concept of auto active test
Concept Of Auto Active Test. Scheme 103
- IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communication. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto active test starts successfully.
- The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test mode
| Symptom | Inspection contents | Possible cause | |
|---|---|---|---|
| Rear window defogger does not operate | Perform auto active test. Does the rear window defogger operate? | YES | BCM signal input circuit |
| NO | Rear window defogger Rear window defogger ground circuit Harness or connector between IPDM E/R and rear window defogger IPDM E/R | ||
| Any of the following components do not operate Parking lamps License plate lamps Tail lamps Front fog lamps Headlamps (HI, LO) Front wiper (HI, LO) | Perform auto active test. Does the applicable system operate? | YES | BCM signal input circuit |
| NO | Lamp or motor Lamp or motor ground circuit Harness or connector between IPDM E/R and applicable system IPDM E/R | ||
| Headlamps HI (daytime running light operation) do not operate | Perform auto active test. Do headlamps HI (daytime running light operation) operate? | YES | CAN communication signal between ECM and BCM CAN communication signal between combination meter and BCM BCM signal input circuit |
| NO | Daytime running light relay power supply circuit Harness or connector between IPDM E/R and daytime running light relay Daytime running light relay | ||
| A/C compressor does not operate | Perform auto active test. Does the magnet clutch operate? | YES | BCM signal input circuit CAN communication signal between BCM and ECM CAN communication signal between ECM and IPDM E/R |
| NO | Magnet clutch Harness or connector between IPDM E/R and magnet clutch IPDM E/R | ||
| Oil pressure warning lamp does not operate | Perform auto active test. Does the oil pressure warning lamp blink? | YES | Harness or connector between IPDM E/R and oil pressure switch Oil pressure switch IPDM E/R |
| NO | CAN communication signal between IPDM E/R and BCM CAN communication signal between BCM and combination meter Combination meter | ||
| Cooling fan does not operate | Perform auto active test. Does the cooling fan operate? | YES | ECM signal input circuit CAN communication signal between ECM and IPDM E/R |
| NO | Cooling fan motor-2 power supply circuit Cooling fan motor-1 ground circuit Cooling fan relay-4 or cooling fan relay-5 power supply circuit Cooling fan relay-5 ground circuit Harness or connector between IPDM E/R and cooling fan motor Harness or connector between IPDM E/R, and cooling fan relay-4 or cooling fan relay-5 Harness or connector between cooling fan motor-2, and cooling fan relay-4 or cooling fan relay-5 Cooling fan relay-4 or cooling fan relay-5 Cooling fan motor IPDM E/R | ||
DIAGNOSIS CHART
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to " CAN COMMUNICATION SIGNAL CHART ".
The ignition relay integrated in IPDM E/R is operated with ignition switch ON signal from the ignition switch.
See also:
• COOLING FAN CONTROL
• COOLING FAN CONTROL
• COOLING FAN CONTROL