Page 2145 of 4592
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±931
1166 Author: Date:
INSPECTION PROCEDURE
1 Check transponder key coil (See page BE±128).
NG Replace transponder key coil.
OK
2 Check harness and connector between transponder key amplifier and ECM.
NG Repair or replace harness and connector.
OK
3 Does it operate normally after replacement of transponder key amplifier?
Yes Replace transponder key amplifier.
No
Replace ECM.
Page 2146 of 4592
I08435
ECM
E10 28
93
E10
E10 3
4G±W
R±L
L±Y Transponder Key Amplifier
CODE
RXCK
TXCT 5S±FE engine:
G±W
R±L
L±Y 1
II4
4
II4
2
II4 DI±932
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1167 Author: Date:
DTC B2797/99 Communication Malfunction No.1
CIRCUIT DESCRIPTION
This code is detected when although the communication has been performed normally, an error occurs.
(Example. Some noise is inclueded in communication line.)
DTC No.DTC Detecting ConditionTrouble Area
B2797/99Communication error
Wire Harness
Transponder Key Amplifier
ECM
WIRING DIAGRAM
DI4FG±01
Page 2147 of 4592
I03114
ECM
E9 24
105
E9
E9 3
4G±W
R±L
L±Y Transponder Key Amplifier
CODE
RXCK
TXCT 1MZ±FE engine:
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±933
1168 Author: Date:
Page 2148 of 4592
I02681
Noise
DI±934
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1169 Author: Date:
INSPECTION PROCEDURE
1 Noise check
PREPARATION:
Insert already registered master key in the key cylinder.
CHECK:
Using an oscilloscope or TOYOTA hand±held tester, check that
noise is included in the CODE terminal of ECM.
OK:
No noise is detected.
NG Try to find the cause of the noise and remove it.
OK
2 Does it operate normally after replacement of transponder key amplifier?
Yes Replace transponder key amplifier.
No
Replace ECM.
Page 2149 of 4592
I08435
ECM
E10 28
93
E10
E10 3
4G±W
R±L
L±Y Transponder Key Amplifier
CODE
RXCK
TXCT 5S±FE engine:
G±W
R±L
L±Y 1
II4
4
II4
2
II4
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±935
1170 Author: Date:
DTC B2798/99 Communication malfunction No.2
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
B2798/99Communication error
Key
Transponder Key Coil
Transponder Key Amplifier
Wireharness
ECM
WIRING DIAGRAM
DI4FH±01
Page 2150 of 4592
I03114
ECM
E9 24
105
E9
E9 3
4G±W
R±L
L±Y Transponder Key Amplifier
CODE
RXCK
TXCT 1MZ±FE engine: DI±936
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1171 Author: Date:
Page 2151 of 4592
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±937
1172 Author: Date:
INSPECTION PROCEDURE
1 Check transponder key coil (See page BE±128).
NG Replace transponder key coil
OK
2 Check harness and connector between transponder key amplifier and ECM.
NG Repair or replace harness and connector
OK
3 Does it operate normally after replacement of transponder key amplifier?
Yes Replace transponder key amplifier.
No
Replace ECM.
Page 2152 of 4592

DI00F±10
Vehicle Brought to Workshop
Customer Problem Analysis P. DI±2
Problem Symptom Confirmation
If engine does not start perform steps 10 and 12 firstConnect OBD II scan tool or TOYOTA hand±held tester to DLC3 P. DI±3
If display indicates a communication fault in tool, inspect DLC3 P. DI±3
Check DTC and Freezed Frame Data (Precheck)
Record or Print DTC and Freezed Frame Data P. DI±3
Clear DTC and Freezed Frame Data P. DI±3
Visual Inspection
Setting Check Mode Diagnosis P. DI±3
Symptom Simulation P. IN±19
Basic Inspection P. DI±3DTC Chart P. DI±3
Problem Symptoms Table P. DI±21
Circuit Inspection P. DI±22
Adjustment, Repair
DTC Check P. DI±3
Titles insideare titles of pages in
in the bottom portion. See the indicated
pages for detailed explanations.this manual with the page number indicated
Malfunction
occurs.Malfunction does not occur.
Parts Inspection
Check for Intermittent Problems P. DI±3
Identification of Problem
Confirmation Test
End 1
2
3
4
5
6
7
108
9
11
12
13
15 14
16
Normal Malfunction code.
17
± DIAGNOSTICSENGINE
DI±1
71 Author: Date:
ENGINE
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.