CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

This circuit sends a signal to the hybrid vehicle control ECU depending on the cruise control main switch condition. The auxiliary battery supplies positive (+) auxiliary battery voltage to the circuit control switch. Then terminal CCS of the hybrid vehicle control ECU receives the voltage according to the switch condition.

WIRING DIAGRAM

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER (CRUISE CONTROL SWITCH)

   
   

   1. Check the Data List for proper functioning of the cruise control switch Click here.

      Cruise Control

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Main SW M-CPU	Cruise control switch signal (Main CPU)/ON or OFF	ON: Cruise control switch is ON OFF: Cruise control switch is OFF	-
      Cancel Switch	CANCEL switch signal/ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
      SET/COAT Switch	-/SET switch signal/ON or OFF	ON: -/SET switch ON OFF: -/SET switch OFF	-
      RES/ACC Switch	+/RES switch signal/ON or OFF	ON: +/RES switch ON OFF: +/RES switch OFF	-

      OK
      When cruise control switch operation is performed, the results are the same as above.

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

2. INSPECT CRUISE CONTROL SWITCH WIRE

   
   
   1. 

      *1	Front view of wire harness connector: (to Spiral Cable Sub-assembly)
      *2	Front view of wire harness connector: (to Cruise Control Switch)

      Disconnect the z2 cable connector.

   2. Disconnect the A switch connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition z2-3 - A-3 Always Below 1 Ω z2-4 - A-1 Always Below 1 Ω A-3 - Body ground Always 10 kΩ or higher A-1 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPLACE CRUISE CONTROL SWITCH WIRE

   OK

3. INSPECT CRUISE CONTROL SWITCH

   
   
   1. 

      *1	Component without harness connected: (Cruise Control Switch)
      *2	ON-OFF
      *3	-/SET
      *4	CANCEL

      Remove the cruise control switch Click here.

   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Switch Condition Specified Condition 1 - 3 Cruise control switch ON Below 2.5 Ω 1 - 3 Cruise control switch OFF 1MΩ or higher 1 - 3 +/RES switch hold ON 235 to 245 Ω 1 - 3 -/SET switch hold ON 617 to 643 Ω 1 - 3 CANCEL switch hold ON 1509 to 1571 Ω

   
   

   NG

   REPLACE CRUISE CONTROL SWITCH Click here

   OK

4. INSPECT SPIRAL CABLE SUB-ASSEMBLY

   
   

   1. 

      Disconnect the z2 switch connector.

   2. Disconnect the L126 cable connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition z2-3 - L126-1 (CCS) Always Below 3 Ω z2-4 - L126-2 (ECC) Always Below 3 Ω z2-3 - Body ground Always 10 kΩ or higher z2-4 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

   OK

5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - HYBRID VEHICLE CONTROL ECU AND BODY GROUND)

   

   *1	Front view of wire harness connector: (to Spiral Cable Sub-assembly)
   *2	Front view of wire harness connector: (to Hybrid Vehicle Control ECU)

   
   

   1. Disconnect the L126 cable connector.

   2. Disconnect the A76 ECU connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition L126-1 (CCS) - A76-35 (CCS) Always Below 1 Ω L126-2 (ECC) - Body ground Always Below 1 Ω L126-1 (CCS) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE HYBRID VEHICLE CONTROL ECU Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR