_diagnostics - Cruise Control.pdf

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05–742
DIAGNOSTICS
–
CRUISE CONTROL SYSTEM (April, 2003)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
0526X–05
1
VEHICLE BROUGHT TO WORKSHOP
2
CUSTOMER PROBLEM ANALYSIS (See page 05–744 )
3
CHECK AND CLEAR DTC (See page 05–745 )
4
PROBLEM SYMPTOM CONFIRMATION
SYMPTOM DOES NOT OCCUR (GO TO
STEP 5)
SYMPTOM OCCUR (GO TO STEP 6)
5
SYMPTOM SIMULATION (See page 01–20 )
6
DTC CHECK (See page 05–745 )
MALFUNCTION CODE (GO TO STEP 7)
NORMAL CODE (GO TO STEP 8)
7
DTC CHART (See page 05–750 )
GO TO STEP 9
8
PROBLEM SYMPTOMS TABLE (See page 05–754 )
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DIAGNOSTICS
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CRUISE CONTROL SYSTEM (April, 2003)
9
CIRCUIT INSPECTION (See page 05–755 – 05–788 )
10
IDENTIFICATION OF PROBLEM
11
PARTS INSPECTION
12
REPAIR
13
CONFIRMATION TEST
END
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05–744
DIAGNOSTICS
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CRUISE CONTROL SYSTEM (April, 2003)
CUSTOMER PROBLEM ANALYSIS CHECK
057SB–01
CRUISE CONTROL SYSTEM Check Sheet
Inspector’s name:
Customer’s Name
Registration No.
Registration Year
Frame No.
Odometer Reading
Date Vehicle
Brought in
/ /
Mile
Date of Problem
/ /
Occurrence
Condition of
Problem
Occurrence
How Often does
Continuous
Intermittent (Times a day)
Problem Occur?
Vehicle Speed when
Problem Occurred
km
Mile
Auto cancel
occurs
Driving condition
City driving
Freeway
Up hill
Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes
No
Cancel does not
occur
Brake pedal depressed
Except D position shift (A/T)
Clutch pedal depressed (M/T)
Symptoms
At 40km/h (25 mph) or less
When control main switch turns to CANCEL position
Cruise control
malfunction
Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction
SET
ACCEL
COAST
RESUME
CANCEL
CRUISE main
indicator light
Remains ON
Does not light up
Blinking
DTC Check
1st Time
2nd Time
Normal Code
Malfunction Code (Code )
Normal Code
Malfunction Code (Code )
2004 COROLLA (RM1037U)
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05–745
DIAGNOSTICS
–
CRUISE CONTROL SYSTEM (April, 2003)
PRE–CHECK
1. PRE–CHECK
(a) Check that the cruise control actuator assy, acceleration wire, accelerator auto drive cable assy, and
link assy are installed correctly and that the wire and link are securely connected.
(b) Check that the operating movement of the acceleration pedal, cruise control actuator assy, accelera-
tion wire, accelerator auto drive cable assy and link is smooth.
(c) Adjust the acceleration auto drive cable assy and link system not to allow any play or excessive ten-
sion.
(d) Check that the cruise control ECU assy, cruise control actuator assy, cruise control main switch assy
and connectors of each cancel switch are connected securely.
(e) When turning on the main switch of the cruise control main switch assy by pressing the button with
the ignition switch to ON, check that the CRUISE main indicator light in the accessory meter assy lights
up.
057SC–02
2. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch to ON.
(2) Check that the CRUISE main indicator light comes
on when the cruise control main switch button is
turned ON, and that the indicator light goes off when
the main switch button is turned OFF.
I32591
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page 05–638 ) for the combination meter
section.
CG
DLC3
(b) Check the DTC using diagnosis check wire.
(1) Turn the ignition switch to ON.
(2) Using SST, connect terminals Tc and CG of DLC3.
SST 09843–18040
(3) Read the DTC on the CRUISE main indicator light.
12 3
4 5678
9
10 11 13
12
14
15
16
Tc
F40034
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05–746
DIAGNOSTICS
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CRUISE CONTROL SYSTEM (April, 2003)
Normal Code
HINT:
If the DTC is not output, inspect the diagnosis circuit (See page
05–788 ).
As an example, the blinking patterns for codes are shown in the
illustration; normal, 11 and 21.
0.25 sec.
0.25 sec.
ON
OFF
Malfunction codes 11 and 21
0.5 sec.
0.5 sec.
4 sec.
1.5 sec.
2.5 sec.
1.5 sec.
ON
OFF
Code 11
Code 21
BE4032
BE4033
I30407
3. USING HAND–HELD TESTER
(a) Hook up the hand–held tester to the DLC3.
(b) Monitor the ECU data by following the prompts on the tester screen.
HINT:
The hand–held tester has a ”Snapshot” function which records the monitored data.
Please refer to the hand–held tester operator’s manual for further details.
4.
DTC CLEARANCE (ERASE MODE)
(b) DLC3
(d) 5 times
within 3 seconds
HINT:
During in the erase mode, diag detection does not work.
(a) Drive at about 15 km/h or below.
(b) Using SST, connect terminals Tc and CG of DLC3.
SST 09843–18040
(c) Pull the cruise control main switch assy to CANCEL.
(d) On the above mentioned condition, press on the cruise
control main switch button 5 times within 3 seconds.
CG
Tc
(c)
I30568
2004 COROLLA (RM1037U)
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