TOYOTA CAMRY 1999 Service Repair Manual

Q05352
ECM
14 Cruise Control ECU
ODB+
OD1 20
C16E4Y±B
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±169
O/D Cancel Signal Circuit
CIRCUIT DESCRIPTION
While driving uphill with cruise control activated, in order to minimize gear shifting and provide smooth cruis-
ing overdrive may be prohibited temporarily under some conditions.
The cruise control ECU sends O/D cut signals to the ECM as necessary and the ECM cancels overdrive
shifting until these signals are discontinued.
WIRING DIAGRAM
DI038±05

BE3840
D05153D05153
ON
OD1 (+)
(±)
BE3840
I00143D00057
ON
OD (+) (±)
DI±170
± DIAGNOSTICSAUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
1 Check voltage between terminal OD1 of ECM and body ground.
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure voltage between terminal OD1 of ECM and body
ground.
OK:
Voltage: 9 ± 14 V
OK Proceed to next circuit inspection shown on
matrix chart (See page DI±148).
NG
2 Check voltage between terminal OD of cruise control ECU harness side connec-
tor and body ground.
PREPARATION:
(a) Disconnect the cruise control ECU connector.
(b) Turn the ignition switch to ON.
CHECK:
Measure voltage between terminal OD of cruise control ECU
harness side connector and body ground.
OK:
Voltage: 9 ± 14 V
OK Check and replace the cruise control ECU.
NG
3 Check harness and connector between cruise control ECU and ECM.
NG Repair or replace the harness or connector.
OK
Check and replace the ECM.

D05150
ECM
B+
OD2
(*) O/D Main
Switch Instrument
Panel J/BIgnition Switch
J5
Junction
Connector
B±RAM1
G±O
E47 IF1 11
G±O
G±O
O2 2
O2 4C
C
C
W±B
J4
Junction
Connector
W±B A
A
IE G±O IG1I104
I102
W
IK2
AM1
IB 1
B±R
F14 1
F14 2
ALT
F9 1
B±G
FL
MAINInstrument Panel
J/B
GAUGE
O/D OFF
Indicator Light
(Combination Meter)
FUSIBLE
LINK
BLOCK
O/D Main Switch
Contacts go open with switch pushed in
contacts go closed with switch pushed once again1K1
1D2
R±L
R±L
Battery J3
Junction
Connector
DDC127
C1012
*:
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±171
O/D Main Switch & O/D OFF Indictor Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed out.
In O/D main switch in OFF position, the O/D OFF indicator light lights up, and the ECM prohibits shifting over-
drive.
WIRING DIAGRAM
DI1J1±04

Q07595
2
4
DI±172
± DIAGNOSTICSAUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
O/D OFF indicator light does not light up
1 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
Check continuity at each terminal 2 and 4 of O/D main switch
connector.
OK:
O/D main switchSpecified condition
ONNo continuity
OFFContinuity
NG Replace the O/D main switch.
OK
2 Check and replace combination meter (See page BE±4).
NG Replace the combination meter.
OK

D05151BE3840D06388
ON
OD2
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±173
3 Check OVERDRIVE CUT SW2 signal.
When using hand±held tester:
PREPARATION:
(a) Remove the DLC3 cover.
(b) Connect hand±held tester to the DLC3.
(c) Turn the ignition switch to ON and hand±held tester main
switch ON.
CHECK:
Read the OVRDRIVE CUT SW2 signal on the hand±held tester.
OK:
O/D main switch conditionOVRDRIVE CUT SW2 signal
O/D ON (Pushed in)OFF
O/D OFF (Pushed once again)ON
When not using hand±held tester:
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Check voltage between terminal OD2 of ECM and body ground.
OK:
O/D main switch conditionVoltage
O/D ON (Pushed in)9 ± 14
O/D OFF (Pushed once again)Below 1.5 V
OK Check and replace the ECM (See page IN±29).
NG
4 Check harness and connector between O/D OFF indicator light and ECM (See
page IN±29).
NG Repair or replace the harness or connector.
OK
Check and replace the ECM (See page
IN±29).

Q07595
2
4
DI±174
± DIAGNOSTICSAUTOMATIC TRANSAXLE
O/D OFF indicator light remains ON
1 Check O/D main switch.
PREPARATION:
Disconnect the O/D main switch connector.
CHECK:
Check continuity at each terminal 2 and 4 of O/D main switch
connector.
OK:
O/D main switchSpecified condition
ONNo continuity
OFFContinuity
NG Replace the O/D main switch.
OK
2 Check harness and connector between O/D OFF indicator light and O/D main
switch, O/D OFF indicator light and ECM (See page IN±29).
NG Repair or replace the harness or connector.
OK
Check and replace the ECM (See page
IN±29).

DI03A±03
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI±176
Check and Clear DTC (Precheck)
P.
DI±177
Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN±19
Symptom
does not occur
Symptom
occurs
DTC Check
P. DI±177
Sensor CheckCircuit Inspection
P. DI±186 ± DI±218
DTC Chart
P. DI±181 Malfunction codeProblem Symptoms Table
P. DI±185
Check for Fluid Leakage
P. DI±220
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Step 2, 5, 8, 9, 11:Diagnostic steps permitting the use of the
TOYOTA hand±held tester or TOYOTA
break±out±box.
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±175
245 Author: Date:
ANTI±LOCK BRAKE SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.

DI03B±02
ABS Check Sheet
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration Year Registration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
Remains ONDoes not Light Up
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
ABS does not operate.
ABS Warning Light
AbnormalABS does not operate efficiently. DI±176
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
CUSTOMER PROBLEM ANALYSIS CHECK

F00047
DI03C±04
F00006
DLC1Short Pin
S-17-1 Iei-23-1-A
F00041
DLC2 DLC1
Tc E1
E1Tc
R01346
Normal Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
DI±177
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light goes on for 3 seconds.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting for the ABS warning light circuit (See page DI±213).
(b) Check the DTC.
(1) Disconnect the short pin from DLC1.
(2) Using SST, connect terminals Tc and E
1 of DLC2 or
DLC1.
SST 09843 ± 18020
(3) Turn the ignition switch ON.
(4) Read the DTC from the ABS warning light on the
combination meter.
HINT:

If no code appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI±216 or DI±213).

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(5) Codes are explained in the code table on page
DI±181.
(6) After completing the check, disconnect terminals Tc
and E
1, and turn off the display.
If 2 or more malfunctions are indicated at the same time the low-
est numbered DTC will be displayed 1st.

H07517
TOYOTA
Hand±held Tester
DLC2
BR3890
F00006DLC1Short Pin
N09348
Hand±held Tester
Break±out±boxECUTOYOTA
TOYOTA DI±178
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM
(c) Using TOYOTA hand±held tester, check the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC2.
(2) Read the DTC by following the prompts on the tes-
ter screen.
Please refer to the TOYOTA hand±held tester oper-
ator 's manual for further details.
(d) Clear the DTC.
(1) Using SST, connect terminals Tc and E
1 of DLC2 or
DLC1 and remove the short pin from DLC1.
SST 09843 ± 18020
(2) Turn the ignition switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 or more times within 5 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of DLC2 or
DLC1.
SST 09843 ± 18020
(6) Connect the short pin to DLC1.
(e) Using TOYOTA break±out±box and TOYOTA hand±held
tester, measure the ECU terminal values.
(1) Hook up the TOYOTA hand±held tester and
TOYOTA break±out±box to the vehicle.
(2) Read the ECU input/output values by following the
prompts on the tester screen.
HINT:
TOYOTA hand±held tester has a ºSnapshotº function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand±held tester/TOYOTA break±
out±box operator's manual for further details.