DTC C1203/53 ECM Communication Circuit Malfunction

Size: px

Start display at page:

Download "DTC C1203/53 ECM Communication Circuit Malfunction"

Justin O’Brien’
5 years ago
Views:

1 RKE CONTROL VEHICLE STILITY CONTROL SYSTEM C 85 DTC C1203/53 ECM Communication Circuit Malfunction DESCRIPTION The circuit is used to send TRC and VSC control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CN communication system. DTC No. DTC Detection Trouble rea C1203/53 Engine drive source and destination variation that are sent from the ECM do not match the one of the ECU. ECM WIRI DIGRM ECM Master Cylinder Solenoid CNH CNH CNL CNL C C132914E01 INSPECTION PROCEDURE 1 CHECK DTC (FOR EINE CONTROL SYSTEM) Check if the engine control system (See page ES-31 for 1GR-FE, or ES-35 for 2UZ-FE). INSPECT EINE CONTROL SYSTEM REPLCE ECM

2 C 86 RKE CONTROL VEHICLE STILITY CONTROL SYSTEM DTC C1210/36 DTC C1336/39 Zero Point Calibration of Yaw Rate Sensor Undone Zero Point Calibration of cceleration Sensor Undone DESCRIPTION The skid control ECU receives signals from the yaw rate and acceleration sensor via the CN communication system. The yaw rate sensor has a built-in acceleration sensor. If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CN communication system, the DTC U0123/62 (yaw rate sensor communication trouble) and U0124/95 (acceleration sensor communication trouble) are output. These DTCs are also output when the calibration has not been completed. C DTC No. DTC Detection Trouble rea C1210/36 C1336/39 When either of the following conditions is detected: 1. When battery terminal was connected, shift lever was moved to non-p position within 15 seconds after ECU terminal IG1 became ON first. 2. When the yaw rate sensor zero point recorded in ECU is deleted. When either of the following conditions is detected: 1. In test mode, shift lever is shifted to non-p position 2 seconds after ECU terminal IG1 is turned ON first. 2. When acceleration sensor zero point recorded in ECU is deleted. Yaw rate and acceleration sensor Zero point calibration undone Park/Neutral position switch (P) circuit Yaw rate and acceleration sensor Zero point calibration undone Park/Neutral position switch (P) circuit If these codes (C1210/36 and/or C1336/39) are output, the following situations will occur. The VSC TRC warning light and the VSC OFF and SLIP indicator lights will come on. Control of all systems other than S, ED, and is canceled.

3 RKE CONTROL VEHICLE STILITY CONTROL SYSTEM C 87 WIRI DIGRM Yaw Rate and cceleration Sensor Master Cylinder Solenoid 11 CNH 3 CNH 25 CNL 2 CNL Park/Neutral Position Switch 14 PL 6 P C C132915E02 INSPECTION PROCEDURE NOTICE: When replacing the master cylinder solenoid, perform zero point calibration (See page C-20). When U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 is output together with C1210/36 or C1336/39, inspect and repair the trouble areas indicated by U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 first. 1 PERFORM ZERO POINT CLIRTION OF YW RTE ND CCELERTION SENSOR 2 RECONFIRM DTC Clear the DTCs (See page C-39). Check if the same DTCs are detected. (See page C- 39).

4 C 88 RKE CONTROL VEHICLE STILITY CONTROL SYSTEM The DTCs are recorded because zero point calibration has not been completed. End the procedure since the same DTCs are not recorded after completion of the zero point calibration. END 3 CHECK SENSOR INSTLLTION Check that the yaw rate and acceleration sensor has been installed properly. : The sensor should be tightened to the specified torque. The sensor should not be tilted. INSTLL YW RTE ND CCELERTION SENSOR CORRECTLY C 4 CHECK HRNESS ND CONNECTOR (SKID CONTROL ECU - PRK/NEUTRL POSITION SWITCH) Skid Control ECU Harness Side Connector Front View: P Disconnect the skid control ECU connector and Park/ Neutral position switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Specified -14 (P) - P1-6 (PL) elow 1 Ω -14 (P) - ody ground 10 kω or higher Park/Neutral Position Switch Harness Side Connector Front View: REPIR OR REPLCE HRNESS OR CONNECTOR P1 PL F052381E04

5 RKE CONTROL VEHICLE STILITY CONTROL SYSTEM C 89 5 INSPECT PRK/NEUTRL POSITION SWITCH SSEMLY Park/Neutral Position Switch Harness Side Connector Front View: Measure the resistance according to the value(s) in the table below. Standard resistance P1 C124790E05 Tester Connection Specified 2-6, 4-5 P elow 1 Ω 1-2 R elow 1 Ω 2-9, 4-5 N elow 1 Ω 2-7 D, 4 elow 1 Ω elow 1 Ω 2-8 2, L elow 1 Ω REPLCE PRK/NEUTRL POSITION SWITCH SSEMLY 6 REPLCE YW RTE ND CCELERTION SENSOR Replace the yaw rate and acceleration sensor (See page C-91). C 7 PERFORM ZERO POINT CLIRTION OF YW RTE ND CCELERTION SENSOR 8 RECONFIRM DTC Clear the DTCs (See page C-39). Check if the same DTCs are detected (See page C-39). Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs. END REPLCE MSTER CYLINDER SOLENOID

Check CAN Bus Lines for Short Circuit

Check CAN Bus Lines for Short Circuit 30 N COMMUNITION N COMMUNITION SYSTEM Check N us Lines for Short Circuit DESCRIPTION The N bus lines are considered to be shorted when the resistance between terminals 6 () and 4 () of the DLC3 is below