DTC B1772 Seat Position Sensor Circuit Malfunction

Transcription

1 500 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for T 1772 ircuit Malfunction ESRIPTION The seat position sensor circuit consists of the occupant classification EU and the seat position sensor. The seat position sensor sends the seat position signal to the occupant classification EU to control the dual stage deployment of the front passenger airbag assembly. T 1772 is recorded when a malfunction is detected in the seat position sensor circuit. T No. T etecting ondition Trouble rea 1772 classification EU receives line short circuit signal, open circuit signal, short circuit to signal or short circuit to + signal in seat position sensor circuit for 2 seconds. Seat position sensor malfunction classification EU malfunction No. 1 seat wire Seat position sensor classification EU When T 1650/32 is detected as a result of troubleshooting the supplemental restraint system, check the Ts stored in the occupant classification EU, and perform troubleshooting for those Ts first. Use the intelligent tester to check for Ts of the occupant classification EU, otherwise the T cannot be read.

2 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for 501 WIRI IGRM 2 GR 4 1 L 3 S28 lassification EU H101958E01 If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installation bolts to see the under surface of the seat cushion. In the above case, hold the seat so that it does not tip over. Holding the seat up for a long period of time may cause problems, such as seat rail deformation. Hold the seat up only for as long as necessary. 1 HEK T lear the Ts stored in the memory (See page - First clear Ts stored in the occupant classification EU and then in the center airbag sensor assembly. heck the Ts (See page -

3 502 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for : T 1772 is not output. Ts other than 1772 may be output at this time, but they are not related to this check. USE SIMULTION METHO TO HEK 2 HEK ONNETO isconnect the negative (-) terminal cable from the heck that the connectors are properly connected to the occupant classification EU and the seat position sensor. : The connectors are properly connected. isconnect the connectors from the occupant classification EU and the seat position sensor. heck that the terminals of the connectors are not damaged. : The terminals are not deformed or damaged. If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. REPIR OR REPLE WIRE HRNESS OR ONNETOR

4 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for HEK NO. 1 SET WIRE (TO +) lassification EU isconnect the connectors from the occupant classification EU and the seat position sensor. onnect the negative (-) terminal cable to the battery. Measure the voltage. Standard voltage Tester onnection ondition Specified ondition -4 () - ody Ignition switch ON elow 1 V -3 () - ody Ignition switch ON elow 1 V REPIR OR REPLE NO. 1 SET WIRE H101899E02 4 HEK NO. 1 SET WIRE (FOR OPEN) lassification EU isconnect the negative (-) terminal cable from the Using a service wire, connect S28-2 () and S28-1 () of connector. NOTIE: o not forcibly insert the service wire into the terminals of the connector when connecting. Measure the resistance. Standard resistance Tester onnection ondition Specified ondition S28-4 () - -3 () lways elow 1 Ω 1 2 REPIR OR REPLE NO. 1 SET WIRE Service Wire H101901E01

5 504 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for 5 HEK NO. 1 SET WIRE (TO GROUN) lassification EU isconnect the service wire from connector. Measure the resistance. Standard resistance Tester onnection ondition Specified ondition -4 () - ody lways 1 MΩ or higher -3 () - ody lways 1 MΩ or higher REPIR OR REPLE NO. 1 SET WIRE H101899E02 6 HEK NO. 1 SET WIRE (FOR SHORT) Measure the resistance. Standard resistance Tester onnection ondition Specified ondition -4 () - -3 () lways 1 MΩ or higher lassification EU REPIR OR REPLE NO. 1 SET WIRE H101899E02

6 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for HEK T (f) (g) onnect the connectors to the occupant classification EU and the seat position sensor. onnect the negative (-) terminal cable to the battery. lear the Ts stored in the memory (See page - First clear Ts stored in the occupant classification EU and then in the center airbag sensor assembly. heck the Ts (See page - : T 1772 is not output. Ts other than 1772 may be output at this time, but they are not related to this check. USE SIMULTION METHO TO HEK 8 REPLE SET POSITION SENSOR (f) (g) (h) (i) isconnect the negative (-) terminal cable from the Replace the seat position sensor (See page -480). Perform the inspection using parts from a normal vehicle if possible. The seat position sensor is installed on the driver side. onnect the negative (-) terminal cable to the battery. lear the Ts stored in the memory (See page - First clear Ts stored in the occupant classification EU and then in the center airbag sensor assembly. heck the Ts (See page - : T 1772 is not output. Ts other than 1772 may be output at this time, but they are not related to this check. EN

7 506 SUPPLEMENTL RESTRINT SYSTEM OUPNT LSSIFITION SYSTEM (for 9 REPLE OUPNT LSSIFITION EU (f) (g) (h) (i) (j) (k) (l) onnect the intelligent tester to the L3. Store the occupant classification EU data into the intelligent tester (See page -476). If the EU data cannot be stored in the intelligent tester, replace the front seat cushion assembly (with occupant classification EU and occupant classification sensor). isconnect the negative (-) terminal cable from the Replace the occupant classification EU (See page - 634). onnect the negative (-) terminal cable to the battery. Load the data from the previous EU stored in the tester, into the newly installed EU (See page -476). lear the Ts stored in the memory (See page - If T is not cleared at this time, past T will remain. NEXT 10 PERFORM SENSITIVITY HEK Perform the sensitivity check (See page -480). NEXT EN