Suzuki Wagon R Plus RB310 - TCM Power and Ground Circuit Check

7B1-48 AUTOMATIC TRANSAXLE (M13 ENGINE)
Diagnostic Flow Table A-5: TCM Power and Ground Circuit Check
Wiring Diagram
Troubleshooting
1. TCM 3. Ignition switch
2. A/T relay [A]: Terminal arrangement of TCM connector (viewed from harness side)
BLK
BLK
BLK
E13-1
E13-23
E13-6
WHT/RED
GRN
BLK/WHT
+BB
E13-24
WHT/BLU
1
2
3
6
24 23
1
E13
E12
[A]
Step Action Yes No
1 Check TCM Back-up Power Circuit
1) Disconnect TCM connector with ignition
switch OFF.
2) Check for proper connection to TCM at
“E13-24” terminal.
3) If OK, check voltage at terminal “E13-24” of
disconnected TCM connector.
Is it 10 – 14 V?
Go to Step 2. “WHT/BLU” circuit open
or shorted to ground.
2 Check TCM Power Circuit.
1) Disconnect TCM connector with ignition
switch OFF.
2) Check for proper connection to TCM at
“E13-6” terminal.
3) If OK, turn ignition switch ON and check
voltage at terminal “E13-6” of disconnected
TCM connector.
Is it 10 – 14 V?
Go to Step 4. Go to Step 3.
3 Check A/T Relay Operation.
Check A/T relay operation referring to “A/T
Relay Inspection” in this section.
Is check result satisfactory?
“WHT/RED”, “GRN”.
“BLK/WHT” or “BLK” cir-
cuit for power supply
open.
Replace A/T relay.