HOW TO PROCEED WITH TROUBLESHOOTING
Use these procedures to troubleshoot the rear sunshade system.
- VEHICLE BROUGHT TO WORKSHOP
- INSPECT BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.
- INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN) Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally. Result RESULT TABLE Result Proceed to MPX DTC is not output A MPX DTC is output B B: Go to «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) A: Go to next step.
- PROBLEM SYMPTOMS TABLE Refer to «PROBLEM SYMPTOMS TABLE»(ref-235599-S14104365942006062400000) . Result RESULT TABLE Result Proceed to Fault not listed in problem symptoms table A Fault listed in problem symptoms table B B: Go to step 6 A: Go to next step.
- OVERALL ANALYSIS AND TROUBLESHOOTING See «TERMINALS OF ECU»(ref-235599-S13115010972006062400000) Circuit Inspection (See «REAR SUNSHADE DOES NOT OPERATE WITH REAR SUNSHADE SWITCH»(ref-235599-S25744336132006062400000) , «WIRING DIAGRAM»(ref-235599-S19787750922006062400000) )
- REPAIR OR REPLACE
- CONFIRMATION TEST END
PROBLEM SYMPTOMS TABLE
HINT
Use PROBLEM SYMPTOMS TABLE to help determine the cause of the problem symptoms. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Rear sunshade system
| Symptom | Suspected area | Reference |
|---|---|---|
| Rear sunshade does not operate by manual operation | Rear sunshade switch | WIRING DIAGRAM |
| Fuse (LH-IG) | WIRING DIAGRAM | |
| Wire harness | WIRING DIAGRAM | |
| Rear sunshade relay | WIRING DIAGRAM | |
| Rear sunshade shift-linked function does not operate with shift lever is moved into R position | Multiplex Communication Line | WIRING DIAGRAM |
| Park/Neutral position switch (A760H) | INSPECTION | |
| Park/Neutral position switch (A960E) | INSPECTION | |
| Park/Neutral position switch (A760E) | INSPECTION | |
| Back-up light switch (M/T) | WIRING DIAGRAM | |
| Rear sunshade relay | WIRING DIAGRAM | |
| Wire harness | WIRING DIAGRAM |
PROBLEM SYMPTOMS TABLE
Scheme 134
- CHECK REAR SUNSHADE RELAY Disconnect the Q24 relay connector. Measure the voltage and resistance of the wire harness side connector. REAR SUNSHADE RELAY (Q24 RELAY CONNECTOR DISCONNECTED) Symbols (Terminal No. Wiring Color Terminal Description Condition Specified Condition IG (Q24-1) - E (Q24-5) Y - W-B Power source (IG) Engine switch off Below 1 V IG (Q24-1) - E (Q24-5) Y - W-B Power source (IG) Engine switch on (IG) 10 to 14 V SW (Q24-3) - E (Q24-5) L - W-B Rear sunshade switch signal Engine switch on (IG) Rear sunshade switch OFF 10 k ohms or higher SW (Q24-3) - E (Q24-5) L - W-B Rear sunshade switch signal Engine switch on (IG) Rear sunshade switch ON Below 1 ohms E (Q24-5) - 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 connector. Connect the Q24 relay connector. Measure the voltage of the wire harness side connector. REAR SUNSHADE RELAY (Q24 RELAY CONNECTOR CONNECTED) Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition REV (Q24-2) - Body ground R - W-B Reverse signal Engine switch on (IG), shift lever on except R Below 1 V REV (Q24-2) - Body ground R - W-B Reverse signal Engine switch on (IG), shift lever on R 10 to 14 V SW (Q24-3) - Body ground L - W-B Rear sunshade switch signal Engine switch on (IG), rear sunshade switch not pushed 10 to 14 V SW (Q24-3) - Body ground L - W-B Rear sunshade switch signal Engine switch on (IG), rear sunshade switch pushed Below 1.5 V If the result is not as specified, there may be a malfunction on the wire harness side connector.
Scheme 135
Scheme 136
- DESCRIPTION Rear sunshade system data can be read through the vehicle's Data Link Connector 3 (DLC3). When the system seems to be malfunctioning, use the intelligent tester to check and perform repairs.
- CHECK DLC3 HINT: The vehicle's ECU uses ISO 9141-2 communication protocol. The terminal arrangement of the DLC3 complies with SAEJ 1962 and matches the ISO 9141-2 format. SYMBOLS TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE 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 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 intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.