Suzuki Wagon R RB310 - Inspection of TCM and ITS Circuits

AUTOMATIC TRANSMISSION (4 A/T) 7B-49
Inspection of TCM and ITS circuits
TCM and its circuits can be checked at TCM wiring couplers by
measuring voltage and resistance.
INSPECTION
1) Remove TCM from vehicle referring to “TRANSMISSION
CONTROL MODULE” in this section.
2) Connect TCM couplers to TCM.
3) Check voltage at each terminal of couplers connected.
CAUTION:
TCM cannot be checked by itself, it is strictly prohibited
to connect voltmeter or ohmmeter to TCM with coupler
disconnected from it.
NOTE:
As each terminal voltage is affected by the battery volt-
age, confirm that it is 11 V or more when ignition switch
is ON.
1. TCM 3. Body ground
2. Couplers
TERMINAL CIRCUIT
STANDARD
VOLTAGE
CONDITION
E12
1 Transmission range “P” switch
10 – 14 V IG switch ON, selector lever at “P” range
0 – 1 V IG switch ON, selector lever other than “P” range
2 Transmission range “R” switch
10 – 14 V IG switch ON, selector lever at “R” range
0 – 1 V IG switch ON, selector lever other than “R” range
3 Transmission range “N” switch
10 – 14 V IG switch ON, selector lever at “N” range
0 – 1 V IG switch ON, selector lever other than “N” range
4 Diagnosis switch 10 – 14 V
IG switch ON, diagnosis switch terminal not
grounded
5 Engine speed signal 0 – 1 V IG switch ON, leaving engine OFF
6 Output shaft speed sensor(+) – –
7 Input shaft speed sensor(+) – –
8 throttle opening signal – –
9 Transmission range “D” switch
10 – 14 V IG switch ON, selector lever at “D” range
0 – 1 V IG switch ON, selector lever other than “D” range
10 Transmission range “2” switch
10 – 14 V IG switch ON, selector lever at “2” range
0 – 1 V IG switch ON, selector lever other than “2” range
11 Transmission range “L” switch
10 – 14 V IG switch ON, selector lever at “L” range
0 – 1 V IG switch ON, selector lever other than “L” range