SUPPLEMENTAL RESTRAINT SYSTEMS AIRBAG SYSTEM TC and CG Terminal Circuit
DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
DTCs are displayed by blinking of the SRS warning light.
- HINT:
- ·
When multiple warning lights in the combination meter blink continuously, a ground short in the wiring or an ECU connected to terminal TC of the DLC3 is suspected.
·A DTC output mode signal is transmitted via the CAN communication system to each ECU including the airbag ECU assembly. Thus when multiple systems do not enter DTC output mode, there may be an ECM malfunction.
WIRING DIAGRAM
1.375,0.917 2.448,1.167
1.073,0.25
10
false
49*1, 9*2, 26*3
1.365,0.219 2.677,0.521
1.313,0.302
10
false
41*1, 8*2, 13*3
1.375,2.094 2.542,2.51
1.167,0.417
10
false
27*1, 41*2, 33*3
0.917,1.063 1.396,1.313
0.479,0.25
10
false
CANL
0.906,0.354 1.656,0.698
0.75,0.344
10
false
CANH
1.104,2.188 1.531,2.604
0.427,0.417
10
false
TC
0.521,3.344 2.24,3.542
1.719,0.198
10
false
A56*1*2, A40*3
0.521,3.5 1,3.823
0.479,0.323
10
false
ECM
0.083,3.771 4.406,3.969
4.323,0.198
10
false
*1: for 2NZ-FE
5.927,2.188 6.26,2.542
0.333,0.354
10
false
TC
5.688,2.094 6.042,2.427
0.354,0.333
10
false
13
5.76,2.708 5.979,3.042
0.219,0.333
10
false
4
5.927,2.802 6.25,3.104
0.323,0.302
10
false
CG
6.146,3.344 6.573,3.573
0.427,0.229
10
false
E13
6.146,3.49 6.646,3.833
0.5,0.344
10
false
DLC3
5.938,1.052 6.448,1.417
0.51,0.365
10
false
CANL
5.677,1.49 6.021,1.74
0.344,0.25
10
false
E14
5.677,0.917 6,1.281
0.323,0.365
10
false
22
5.677,0.208 5.948,0.521
0.271,0.313
10
false
13
5.938,0.354 6.406,0.698
0.469,0.344
10
false
CANH
5.667,1.635 7.115,2.063
1.448,0.427
10
false
Airbag ECU Assembly
0.854,4.531 2.615,4.75
1.76,0.219
10
false
: CAN Communication Line
0.083,4.292 2.823,4.563
2.74,0.271
10
false
*3: for 2ZR-FE
0.083,4.031 4.417,4.281
4.333,0.25
10
false
*2: for 1ZR-FE
PROCEDURE
1.CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)
a.
Turn the ignition switch off.
1.99,0.073 2.313,0.271
0.323,0.198
2,1.771 2.333,1.99
0.333,0.219
5.417,1.115 5.75,1.333
0.333,0.219
2.969,2.969 3.531,3.208
false
5.688,2.167 5.688,2.583
false
0.49,1.365 1.646,1.115
false
2.615,2.677 3.531,2.188
false
0.5,0.094 0.875,0.417
0.375,0.323
10
false
*C
0.5,1.823 0.917,2.406
0.417,0.583
10
false
*A
4.635,1.104 4.969,1.417
0.333,0.313
10
false
*1
0.073,0.042 0.448,0.323
0.375,0.281
10
false
*a
2.031,0.094 2.448,0.677
0.417,0.583
10
false
A40
0.292,1.292 0.708,1.875
0.417,0.583
10
false
TC
2.052,1.802 2.469,2.385
0.417,0.583
10
false
A56
3.583,3.146 4.167,3.573
0.583,0.427
10
false
TC*B
5.469,1.146 5.885,1.729
0.417,0.583
10
false
E13
5.604,2.594 6.021,3.177
0.417,0.583
10
false
TC
0.729,1.823 1.146,2.406
0.417,0.583
10
false
*B
3.583,2.094 4.167,2.521
0.583,0.427
10
false
TC*A
| *A | for 2NZ-FE | *B | for 1ZR-FE |
| *C | for 2ZR-FE | - | - |
| *1 | DLC3 | - | - |
| *a | Front view of wire harness connector
(to ECM) |
- | - |
b.
Disconnect the connector from the ECM.
c.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for 2NZ-FE: Tester Connection Condition Specified Condition E13-13 (TC) - A56-27 (TC) Always Below 1 Ω
for 1ZR-FE: Tester Connection Condition Specified Condition E13-13 (TC) - A56-41 (TC) Always Below 1 Ω
for 2ZR-FE: Tester Connection Condition Specified Condition E13-13 (TC) - A40-33 (TC) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
2.CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)
NG
REPAIR OR REPLACE WIRE HARNESS
2.CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)
a.
0.135,0.979 0.469,1.198
0.333,0.219
1.615,0.802 1.615,0.302
1.615,0.302 1.813,0.302
false
0.156,0.135 0.469,0.396
0.313,0.26
10
false
*1
0.188,1.01 0.5,1.313
0.313,0.302
10
false
E13
1.854,0.219 2.25,0.469
0.396,0.25
10
false
CG
| *1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E13-4 (CG) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
3.CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)
NG
REPAIR OR REPLACE WIRE HARNESS
3.CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)
a.
0.188,0.958 0.521,1.188
0.333,0.229
1.958,1.76 1.792,1.76
1.792,1.76 1.792,1.344
false
0.125,0.115 0.406,0.396
0.281,0.281
10
false
*1
0.25,0.99 0.813,1.448
0.563,0.458
10
false
E13
2.021,1.688 2.354,1.979
0.333,0.292
10
false
TC
| *1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E13-13 (TC) - Body ground Always 1 MΩ or higher
- Result:
Proceed to OK NG
OK
REPLACE AIRBAG ECU ASSEMBLY
NG
REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU