Inspection Procedure
- READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch on (IG), and turn the intelligent tester main switch on.
- Check the DATA LIST for proper functioning of the cruise control main switch.
CC (ECM):
DATA LISTTester Display Measurement Item/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/- SW -/SET switch signal / ON or OFF ON: -/SET switch ON OFF: -/SET switch OFF - RES/+ SW +/RES switch signal / ON or OFF ON: +/RES switch ON OFF: +/RES switch OFF - OK:
When cruise control main switch operation is performed, the result will be same as above.
Result:
RESULT REFERENCEResult Proceed to OK A NG (all items are defective) B NG (one to four 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
RESISTANCE SPECIFICATIONTester Connection Switch Condition Specified Condition 1 (ECC) - 2 (R/N), 1 (ECC) - 3 (CCS) Neutral 10 kΩ or higher 1 (ECC) - 3 (CCS) + (ACCEL)/RES (RESUME) 216 to 264 Ω 1 (ECC) - 3 (CCS) - (COAST)/SET 567 to 693 Ω 1 (ECC) - 3 (CCS) CANCEL 1,386 to 1,694 Ω 1 (ECC) - 3 (CCS) Main Switch on Below 1 Ω 1 (ECC) - 2 (R/N) Main Switch on and MODE Switch on Below 1 Ω NG: REPLACE CRUISE CONTROL MAIN SWITCH
OK: Go to Next Step
- INSPECT SPIRAL CABLE NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the article shown in the brackets.
HINT:
- See REMOVAL
- See INSTALLATION
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Remove the spiral cable.
- Measure the resistance according to the value (s) in the table below.
Standard resistance
RESISTANCE SPECIFICATIONTester Connection Spiral Cable Position Specified Condition A-1 - D15-7 Center Below 1 Ω 2.5 rotations to the left 2.5 rotations to the right A-3 - D15-1 Center Below 1 Ω 2.5 rotations to the left 2.5 rotations to the right A-4 - D15-2 Center Below 1 Ω 2.5 rotations to the left 2.5 rotations to the right HINT:
The spiral cable makes a maximum of approximately 5 rotations.
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
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition Spiral cable (D15-1) - CCS (D41-2) Always Below 1 Ω CCS (D41-2) - Body ground Always 10 kΩ or higher Spiral cable (D15-2) - E1 (B47-1) Always Below 1 Ω Spiral cable (D15-7) - Body ground Always 10 kΩ or higher Spiral cable (D15-7) - CCHG (D41-4) Always Below 1 Ω CCHG (D41-4) - Body ground Always 10 kΩ or higher
NG: REPAIR OR REPLACE HARNESS OR 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
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition D15-2 - Body ground Always Below 1 Ω
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE ECM
- Measure the resistance according to the value (s) in the table below.