Inspection Procedure
- READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the engine switch on (IG) and turn the intelligent tester main switch on.
- Check the DATA LIST for proper functioning of the cruise control main switch.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ECM (Cruise control):
DIAGNOSTIC NOTE CHARTItem Measurement Item / Display (Range) Normal Condition Diagnostic Note MAIN SW (MAIN) Main switch signal (Main CPU) / ON or OFF ON: Main switch ON (Pushed on)
OFF: Main switch OFF (Pushed off)- CANCEL SW CANCEL switch signal / ON or OFF ON: CANCEL switch ON
OFF: CANCEL switch OFF- SET/COAST SW SET/COAST switch signal / ON or OFF ON: SET / COAST switch ON
OFF: SET / COAST switch OFF- RES/ACC SW RES/ACC switch signal / ON or OFF ON: RES/ACC switch ON
OFF: RES / ACC switch OFF- OK:
When cruise control main switch operation is performed, the result will be same as above.
Result:
RESULT CHARTResult Proceed to OK A NG (all items are defective) B NG (1 to 3 items are defective) C A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C: REPLACE CRUISE CONTROL MAIN SWITCH
B: Go to next step
- INSPECT CRUISE CONTROL MAIN SWITCH
- Disconnect the cruise control main switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Switch Condition Specified Condition 1 - 2, 1 - 3 Neutral 10 kΩ or higher 1 - 3 RES/ACC 235 to 245 Ω 1 - 3 SET/COAST 620 to 640 Ω 1 - 3 CANCEL 1510 to 1570 Ω 1 - 3 Main Switch OFF 10 kΩ or higher 1 - 3 Main Switch ON Below 1 Ω 1 - 2 MODE Below 1 Ω
NG: REPLACE CRUISE CONTROL MAIN SWITCH
OK: Go to next step
- INSPECT SPIRAL CABLE
- Disconnect the spiral cable connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Condition Specified Condition A-1 - K20-7 Below 1 Ω A-3 - K20-1 Below 1 Ω A-4 - K20-2 Below 1 Ω
NG: REPLACE SPIRAL CABLE
OK: Go to next step
- CHECK WIRE HARNESS (SPIRAL CABLE - ECM)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition K20-1 - A7-31 (CCS) Always Below 1 Ω K20-7 - A6-20 (CCHG) Always Below 1 Ω K20-1 - Body ground Always 10 kΩ or higher K20-7 - Body ground Always 10 kΩ or higher
NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK: Go to next step
- Measure the resistance according to the value(s) in the table below.
- CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition K20-2 - Body ground Always Below 1 Ω
NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- Measure the resistance according to the value(s) in the table below.