Inspection Of TCM And Its Circuits: Notes

TCM and its circuits can be checked at TCM wiring connectors by measuring voltage, pulse signal and resistance.

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 and/or pulse signal at each terminal of connectors connected using voltmeter (3) and oscilloscope (4).
   NOTE:

   • As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition switch is ON.
   • Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with oscilloscope if necessary.
   Fig 1: Checking Voltage At Terminal Of TCM Connectors

   Courtesy of SUZUKI OF AMERICA CORP.

   Terminal arrangement of TCM coupler (Viewed from harness side)

   Fig 2: Identifying TCM Coupler Terminal Arrangement

   Courtesy of SUZUKI OF AMERICA CORP.

Connector "E92"

Terminal number	Wire color	Circuit	Normal Voltage	Condition
1	BLK/ORN	Ground	0 - 1V	Ignition switch ON
2	BRN/RED	Pressure control solenoid valve (-)	0.6 - 1.0 V	Ignition switch ON
3	PPL/WHT	TCC pressure control solenoid valve (-)	0.6 - 1.0 V	Ignition switch ON
4	YEL/RED	Pressure control solenoid valve-A (+)	*0 - 0.6 V ↑↓ 10 - 14 V (Reference Waveform No. 1  )	Engine running at idling. (Output signal is duty pulse. Duty ratio varies depending on throttle valve opening.)
5	GRN/YEL	TCC pressure control solenoid valve (+)	*0 - 0.6 V ↑↓ 10 - 14 V (Reference Waveform No. 2  )	Engine running at idling. (Output signal is duty pulse. Duty ratio varies depending on torque converter clutch opening condition.)
6	BLK/WHT	Power source	10 - 14 V	Ignition switch ON
7	WHT	CAN communication line (active low signal)	*1.6 - 2.8 V (Reference Waveform No. 3  )	Engine running at specified idling speed. (CAN communication signal is pulse. Pulse signal frequency varies depending on engine condition.)
8	-	-	-	-
9	LT GRN/RED	Pressure control solenoid valve-B (-)	0.6 - 1.0 V	Ignition switch ON
10	GRY	Transmission fluid temperature sensor-B (-)	0 - 1 V	Ignition switch ON
11	YEL/BLK	Transmission fluid temperature sensor-A (+)	2.9 - 3.1 V	Ignition switch ON, fluid temperature is 20°C (68°F)
			0.3 - 0.5 V	Ignition switch ON, fluid temperature is 100°C (212°F)
12	ORN	Transmission fluid temperature sensor (-)	0 - 1 V	Ignition switch ON
13	-	-	-	-
14	GRN/RED	Shift solenoid valve-E	0 - 1 V	Ignition switch ON
15	GRN/RED	Shift solenoid valve-B	0 - 1 V	Ignition switch ON, select lever in "P" range
16	GRN	Shift solenoid valve-A	9 - 14 V	Ignition switch ON, select lever in "P" range
17	RED	CAN communication line (active high signal)	*2.5 - 3.8 V (Reference Waveform No. 3  )	Engine running at specified idling speed. (CAN communication signal is pulse. Pulse signal frequency varies depending on engine condition.)
18	-	-	-	-
19	BRN/BLU	Pressure control solenoid valve-C (--)	0.6 - 1.0 V	Ignition switch ON
20	GRY/BLU	Transmission fluid temperature sensor-B (+)	Ignition switch ON, fluid temperature is 20°C (68°F)	Ignition switch ON, fluid temperature is 20°C (68°F)
			Ignition switch ON, fluid temperature is 100°C (212°F)	Ignition switch ON, fluid temperature is 100°C (212°F)
21	LT GRN	Pressure control solenoid valve-C (+)	*0 - 0.6 V ↑↓ 10 - 14 V (Reference Waveform No. 4  )	Ignition switch ON, select lever in "P" range (Output signal is duty pulse.)
22	LT GRN/BLK	Pressure control solenoid valve-B (+)	*0 - 0.6 V ↑↓ 10 - 14 V (Reference Waveform No. 5  )	Engine running at idling (Output signal is duty pulse.)
23	BLK/ORN	Ground	0 - 1 V	Ignition switch ON
24	WHT	Power source for back-up	10 - 14 V	Constantly

Connector "E93"

Terminal	Wire color	Circuit	Standard 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	-	-	-	-
3	-	-	-	-
4	PNK/WHT	4L/N switch	8 - 14 V	Ignition switch ON, transfer position in 4H
			0 - 1 V	Ignition switch OFF, transfer position in 4L and N
5	WHT	Output shaft speed sensor (+)	2 - 3 V	Ignition switch turned ON, engine stops.
			*(Reference Waveform No. 6  )	While engine running. Output signal is waveform. Waveform frequency varies depending on output shaft speed (18 pulses are generated par 1 input shaft revolution).
6	BLU	Input shaft speed sensor (+)	2 - 3 V	Ignition switch turned ON, engine stops.
			*(Reference Waveform No. 7  )	While engine running. Output signal is waveform. Waveform frequency varies depending on input shaft speed (24 pulses are generated par 1 input shaft revolution).
7	YEL/GRN	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
8	PNK/BLU	Transmission range sensor ("N" range)	8 - 14 V	Ignition switch ON, selector lever at "N" range
			0 - 1 V	Ignition switch ON, selector lever at other than "N" range
9	YEL/RED	"4" position switch (+)	2.4 - 4.3 V	Ignition switch ON, select lever in "P", "N" or "D" range
			8 - 14 V	Ignition switch ON, select lever in "R", "3", "2" or "L" range
10	-	-	-	-
11	-	-	-	-
12	-	-	-	-
13	-	-	-	-
14	ORN	Output shaft speed sensor (-)	2 - 3 V	Ignition switch ON, vehicle at stop
15	-	-	-	-
16	PNK	Input shaft speed sensor (-)	2 - 3 V	Ignition switch ON, engine at stop
17	-	-	-	-
18	GRN/WHT	Transmission range sensor ("L" range)	8 - 14 V	Ignition switch ON, select lever at "L" range
			0 - 1 V	Ignition switch ON, select lever at other than "L" range
19	GRN/ORN	Transmission range sensor ("3" range)	8 - 14 V	Ignition switch ON, select lever at "2" range
			0 - 1 V	Ignition switch ON, select lever at other than "2" range
20	PNK/GRN	Transmission range sensor ("P" range)	8 - 14 V	Ignition switch ON, select lever at "P" range
			0 - 1 V	Ignition switch ON, select lever at other than "P" range
21	YEL/BLK	"4" position switch (-)	0 - 1 V	Ignition switch ON
22	-	-	-	-
23	PPL/WHT	Data link connector	8 - 14 V	Ignition switch ON
24	-	-	-	-
25	-	-	-	-
26	-	-	-	-