Multiplex Communication: Diagnosis Toyota Prius II рестайлинг

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use this procedure to troubleshoot the multiplex communication system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT
2. CHECK BATTERY VOLTAGE Standard voltage: 11 V or higher If the voltage is below 11 V, recharge or replace the battery before proceeding. NEXT
3. CHECK DTC OF CAN COMMUNICATION SYSTEM Using the Techstream, check if the CAN is functioning normally. Result: DTC OUTPUT RESULT Result Proceed to CAN DTC is not output A CAN DTC is output B B : Go to CAN COMMUNICATION SYSTEM A : GO TO NEXT STEP
4. CHECK FOR DTC* Check for DTCs and note any codes that are output (see «DTC CHECK / CLEAR»(ref-289876-S35154165712008070800000) ). Delete the DTC. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests. Result: DTC OUTPUT RESULT Result Proceed to DTC does not reoccur A DTC reoccurs B B : Go to step 6 A : GO TO NEXT STEP
5. OVERALL ANALYSIS AND TROUBLESHOOTING «TERMINALS OF ECU»(ref-289876-S04809054692008070800000) . NEXT
6. ADJUST, REPAIR OR REPLACE NEXT
7. CONFIRMATION TEST NEXT : END

Scheme 126

Scheme 127

Scheme 128

Scheme 129

Scheme 130

Scheme 131

Scheme 132

Scheme 133

Scheme 134

1. CHECK GATEWAY ECU Disconnect the G1 connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BATT (G1-10) - Body ground Y - Body ground +B (BATT) power supply Always 10 to 14 V IG (G1-1) - Body ground B - Body ground Ignition power supply Power switch ON (IG) 10 to 14 V ACC (G1-2) - Body ground P - Body ground ACC power supply Power switch ON (ACC) 10 to 14 V SIL (G1-7) - Body ground W - Body ground Bus "+" line During transmission Pulse generation MPD2 (G1-12) - Body ground GR - Body ground BEAN line Always 10 kohms or higher MPD1 (G1-3) - Body ground GR - Body ground BEAN line Always 10 kohms or higher GTX+ (G1-6) - Body ground B - Body ground AVC-LAN line Always 10 kohms or higher GTX- (G1-21) - Body ground W - Body ground AVC-LAN line Always 10 kohms or higher GND (G1-24) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
2. CHECK A/C ECU Disconnect the A8 connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition +B (A8-6) - Body ground Y - Body ground +B power supply Always 10 to 14 V MPX+ (A8-3) - Body ground B - Body ground BEAN line Always 10 kohms or higher MPX2+ (A8-11) - Body ground GR - Body ground BEAN line Always 10 kohms or higher GND (A8-1) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
3. CHECK DRIVER SIDE JUNCTION BLOCK (MAIN BODY ECU) Disconnect the B5 ECU connector. Disconnect the 1A, 1E and 1G junction block connectors. Measure the voltage and resistance of the wire harness side connectors. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition ECUB (1A-30) - Body ground R - Body ground +B (ECUB) power supply Always 10 to 14 V MPX1 (1G-9) - Body ground GR - Body ground BEAN line Always 10 kohms or higher MPX2 (B5-15) - Body ground B - Body ground BEAN line Always 10 kohms or higher GND (1E-17) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
4. CHECK TRANSPONDER KEY ECU Disconnect the T5 ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG (T5-4) - Body ground O - Body ground +B (IG) power supply Always 10 to 14 V MPX1 (T5-17) - Body ground B - Body ground BEAN line Always 10 kohms or higher MPX2 (T5-16) - Body ground GR - Body ground BEAN line Always 10 kohms or higher GND (T5-22) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
5. CHECK TRANSMISSION CONTROL ECU Disconnect the T4 ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition +B (T4-1) - Body ground L - Body ground +B power supply Always 10 to 14 V MPX1 (T4-19) - Body ground GR - Body ground BEAN line Always 10 kohms or higher MPX2 (T4-18) - Body ground B - Body ground BEAN line Always 10 kohms or higher E1 (T4-15) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
6. CHECK CERTIFICATION ECU (WITH SMART KEY) Disconnect the S11 ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition +B1 (S11-1) - Body ground R - Body ground +B power supply Always 10 to 14 V MPX1 (S11-31) - Body ground GR - Body ground BEAN line Always 10 kohms or higher MPX2 (S11-32) - Body ground B - Body ground BEAN line Always 10 kohms or higher E (S11-17) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
7. CHECK COMBINATION METER Disconnect the C10 meter connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition +B (C10-21) - Body ground Y - Body ground +B power supply Always 10 to 14 V MPX+ (C10-24) - Body ground B - Body ground BEAN line Always 10 kohms or higher MPX- (C10-25) - Body ground GR - Body ground BEAN line Always 10 kohms or higher SE (C10-14) - Body ground BR - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
8. CHECK POWER SOURCE CONTROL ECU Disconnect the P6 ECU connector. Measure the voltage and resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition AM1 (P6-33) - Body ground R - Body ground +B (AM1) power supply Always 10 to 14 V MPX1 (P6-7) - Body ground GR - Body ground BEAN line Always 10 kohms or higher MPX2 (P6-24) - Body ground B - Body ground BEAN line Always 10 kohms or higher GND2 (P6-6) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.
9. CHECK TIRE PRESSURE MONITOR ECU Disconnect the T11 ECU connector. Measure the resistance of the wire harness side connector. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG (T11-1) - Body ground B - Body ground Power supply Always 10 to 14 V MPX1 (T11-6) - Body ground W - Body ground BEAN line Always 10 kohms or higher MPX2 (T11-12) - Body ground B - Body ground BEAN line Always 10 kohms or higher GND (T11-7) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side.

Scheme 135

1. DESCRIPTION The gateway ECU sets a diagnosis trouble code (DTC) if a malfunction occurs in the multiplex communication network (MPX). The Techstream allows the DTC to be displayed when the tester is connected to the DLC3.
2. DLC3 The vehicle's ECU uses the ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 15765-4 format. TERMINALS DESCRIPTION AND SPECIFIED CONDITION Symbols (Terminal No.) Terminal Description Condition Specified condition SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 ohms SG (5) - Body ground Signal ground Always Below 1 ohms BAT (16) - Body ground Battery positive Always 11 to 14 V CANH (6) - CANL (14) HIGH-level CAN bus line Power switch OFF 54 to 69 ohms CANH (6) - Body ground HIGH-level CAN bus line Power switch OFF 1 Mohms or higher CANH (6) - CG (4) HIGH-level CAN bus line Power switch OFF 1 kohms or higher CANL (14) - Body ground LOW-level CAN bus line Power switch OFF 1 Mohms or higher CANL (14) - CG (4) LOW-level CAN bus line Power switch OFF 1 kohms or higher If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector. HINT: Connect the cable of the Techstream to the DLC3, turn the power switch ON (IG) and attempt to use the tester. If the screen displays the message UNABLE TO CONNECT TO VEHICLE, there is a problem either with the vehicle or the tester. If communication is normal when the Techstream is connected to another vehicle, inspect the DLC3 on the original vehicle. If communication is still not possible when the tester is connected to another vehicle, the problem is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the power switch ON (IG). Read the DTCs by following the prompts on the Techstream screen. HINT: Refer to the tester operator's manual for further details.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the power switch ON (IG). Erase the DTCs by following the prompts on the tester screen. HINT: Refer to the Techstream operator's manual for further details.

DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODE

HINT

*: Equipped on smart key vehicles.