Inspection of TCM and Its Circuits: Inspection: Notes

1. Remove TCM (1) from vehicle referring to TRANSMISSION CONTROL MODULE (TCM) REMOVAL AND INSTALLATION .
2. Connect TCM connectors (2) to TCM.
3. Check voltage at each terminal of connectors connected.
   NOTE: As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition switch is ON.
   Fig 1: Checking Voltage At TCM Connectors Terminal

   Courtesy of SUZUKI OF AMERICA CORP.
   Fig 2: Identifying TCM Connectors Terminal

   Courtesy of SUZUKI OF AMERICA CORP.

Connector: G07
Terminal number	Wire color	Circuit	Normal Voltage	Condition
1	RED	Transmission range sensor ("R" range)	8 - 14 V	Ignition switch ON, selector lever at "R" range
			0 - 1 V	Ignition switch ON, selector lever at other than "R" range
2	WHT/BLK	Transmission range sensor ("P" range)	8 - 14 V	Ignition switch ON, selector lever at "P" range
			0 - 1 V	Ignition switch ON, selector lever at other than "P" range
3	GRN/BLK	O/D OFF switch	0 - 2 V	O/D OFF switch pressed
			10 - 14 V	O/D OFF switch released
4	BLK	Output shaft speed sensor (+)	2 - 3 V	Ignition switch ON, engine at stop
			(Reference waveform No.1)	While engine running (Output signal is waveform. Waveform frequency varies depending on output shaft speed. (18 pulses are generated par 1 output shaft revolution.))
5	GRN	Input shaft speed sensor (+)	2 - 3 V	Ignition switch ON, engine at stop
			(Reference waveform No.1)	While engine running (Output signal is waveform. Waveform frequency varies depending on input shaft speed. (12 pulses are generated par 1 input shaft revolution.))
6	PPL/WHT	Throttle opening signal (from ECM)	0 - 1.5 V 8 - 12 V (Reference waveform No.2)	Ignition switch ON (Signal from ECM is 128 Hz active low pulse. Duty ratio varies as throttle valve is opened gradually.) Throttle opening 0%= 0.78 ms ON duty Throttle opening 100%= 6.24 ms ON duty
7	GRY/BLK	Engine coolant temp. signal (from ECM)	0 - 1.5 V 10 - 14 V (Reference waveform No.3)	Ignition switch ON (Output signal is active low pulse. Pulse varies depending on engine coolant temperature.)
8	YEL/RED	Transmission range sensor ("D" range)	8 - 14 V	Ignition switch ON, selector lever at "R" range
			0 - 1 V	Ignition switch ON, selector lever at other than "R" range
9	WHT/RED	Transmission range sensor ("N" range)	8 - 14 V	Ignition switch ON, selector lever at "R" range
			0 - 1 V	Ignition switch ON, selector lever at other than "R" range
10	RED/YEL	Serial data line to speedometer	0 - 1.3 V 10 - 14 V (Reference waveform No.4)	Ignition switch ON
11	-	-	-	-
12	-	-	-	-
13	PNK/BLU	Cruise control signal	10 - 14 V	Engine running at idling speed, vehicle at stop
14	BRN/YEL	Air conditioner compressor signal	0 - 1.5 V	Ignition switch ON, A/C compressor turned ON
			10 - 14 V	Ignition switch ON, A/C compressor turned OFF
15	LT GRN/BLK	Engine speed signal from ECM	0 - 1 V	Ignition switch ON, engine at stop
			0 - 1.5 V 10 - 14 V (Reference waveform No.5)	While engine running (Signal from ECM is pulse. Pulse frequency varies depending on engine speed. (3000 RPM = 100 Hz))
16	WHT	Output shaft speed sensor (-)	2 - 3 V	Ignition switch ON, engine at stop
17	RED	Input shaft speed sensor (-)	2 - 3 V	Ignition switch ON, engine at stop
18	LT GRN/RED	Torque reduction signal	0 - 1.3 V 4 - 6 V (Reference waveform No.6)	Vehicle running at after warning up (Signal from TCM is 100 Hz active low duty pulse. Pulse generated time is shifting time when transmission gear is shifted by TCM.)
19	-	-	-	-
20	RED/BLU	Transmission range sensor ("L" range)	8 - 14 V	Ignition switch ON, selector lever at "L" range
			0 - 1 V	Ignition switch ON, selector lever at other than "L" range
21	YEL	Transmission range sensor ("2" range)	8 - 14 V	Ignition switch ON, selector lever at "2" range
			0 - 1 V	Ignition switch ON, selector lever at other than "2" range
22	-	-	-	-
23	RED/WHT	Engine torque signal from ECM	0 - 1.5 V 10 - 14 V (Reference waveform No.7)	Engine running (Output signal is active low pulse. Pulse varies depending on engine torque.)
24	-	-	-	-
25	-	-	-	-
26	-	-	-	-
27	GRN/YEL	Serial communication line from ECM	0 - 1.8 V 10 - 14 V (Reference waveform No.8)	Ignition switch ON (Output signal is active low pulse. Pulse is generated from ECM and TCM each other.)
28	GRY/RED	"D" range signal	9 - 14 V	Ignition switch ON, selector lever at "P" or "N" range
			0 - 1 V	Ignition switch ON, selector lever at "R", "D", "2" or "L" range

Connector: G08
Terminal number	Wire color	Circuit	Normal Voltage	Condition
1	-	-	-	-
2	-	-	-	-
3	GRN/ORN	Shift solenoid valve-B (No. 2)	9 - 14 V	Ignition switch ON
4	GRY	Shift solenoid valve-A (No. 1)	0 - 1 V	Ignition switch ON
5	BLU/ORN	Transmission fluid temperature sensor (+)	2.7 - 2.9 V	Ignition switch ON, fluid temperature is 20 °C (68 °F)
			0.3 - 0.4 V	Ignition switch ON, fluid temperature is 100 °C (212 °F)
6	PPL/YEL	Diagnosis switch	8 - 14 V	Ignition switch ON
7	BLU	Data link connector	8 - 14 V	Ignition switch ON
8	GRY/BLK	Pressure control solenoid valve (-)	0.6 - 1.0 V	Ignition switch ON
9	-	-	-	-
10	-	-	-	-
11	GRY/RED	Pressure control solenoid valve (+)	0 - 1.5 V 10 - 14 V (Reference waveform No.9)	Engine running at idling speed (Output signal is duty pulse. Duty ratio varies depending on throttle valve opening.)
12	BLU/WHT	TCC solenoid valve	0 - 1 V	Engine running at idling speed
13	WHT/RED	Power source for back-up	10 - 14 V	Constantly
14	LT GRN	Transmission fluid temperature sensor (-)	0 - 1 V	Ignition switch ON
15	BLK	Ground	0 - 1 V	Ignition switch ON
16	GRN/WHT	Brake light switch	8 - 14 V	Ignition switch ON, brake pedal depressed
			0 - 1 V	Ignition switch ON, brake pedal released
17	-	-	-	-
18	-	-	-	-
19	BLK	Ground	0 - 1 V	Ignition switch ON
20	BLK/WHT	Power source	10 - 14 V	Ignition switch ON