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Pin Voltage Tests

Ensure all pin voltage values at body Electronic Control Unit (ECU) are within specifications. Measure voltage between body ECU connector I21 terminal No. 4 (ground) and appropriate terminals (backprobe), under specified conditions. See BODY ECU PIN VOLTAGE TEST  table.

Fig 1: Identifying Body ECU Harness Connectors & Terminals
G00016062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
BODY ECU PIN VOLTAGE TEST

Terminal No. (1) Condition Volts
Connector I19
1 One Or More Doors Open Less Than 1
All Doors Closed 10-14
2 One Or More Doors Open Less Than 2
All Doors Closed 10-14
3 Passenger Door Closed 10-14
Passenger Door Open Less Than 1
4 Driver Door Lock Control Switch In OFF Position 10-14
Driver Door Lock Control Switch In UNLOCK Position Less Than 1
5 Passenger Door Lock Control Switch In OFF Position 10-14
Passenger Door Lock Control Switch In UNLOCK Position Less Than 1
6 Driver Door Key Lock/Unlock Switch In OFF Position 10-14
Driver Door Key Lock/Unlock Switch In LOCK Position Less Than 1
7 Passenger Door Key Lock/Unlock Switch In OFF Position 10-14
Passenger Door Key Lock/Unlock Switch In LOCK Position Less Than 1
8 Driver Door Lock Control Switch In OFF Position 10-14
Driver Door Lock Control Switch In LOCK Position Less Than 1
9 Passenger Door Lock Control Switch In OFF Position 10-14
Passenger Door Lock Control Switch In LOCK Position Less Than 1
10 Passenger Door Key Lock/Unlock Switch In OFF Position 10-14
Passenger Door Key Lock/Unlock Switch In UNLOCK Position Less Than 1
11 Driver Door Key Lock/Unlock Switch In OFF Position 10-14
Driver Door Key Lock/Unlock Switch In LOCK Position Less Than 1
13 At All Times 10-14
14 Driver Door Closed 10-14
Driver Door Opened Less Than 1
15 Ignition On & Headlights On Less Than 2
Ignition On & Headlights Off 10-14
16 Rear Wiper Switch In OFF, LO, Or HI Position 10-14
Rear Wiper Switch In INT AUTO Position Less Than 1
17 Rear Wiper Switch In OFF, INT AUTO, Or LO Position 10-14
Rear Wiper Switch In HI Position Less Than 1
18 Headlight Switch In HEAD Or TAIL Position Less Than 1
Headlight Switch In OFF Position 10-14
19 Headlight Switch In HEAD Position Less Than 1
Headlight Switch In Any Position Except HEAD 10-14
20 Key Inserted In Ignition Switch Less Than 1
Key Is Not Inserted In Ignition Switch 10-14
21 Ignition Switch In ACC Position 10-14
Connector I20
1 Right Rear Door Is Opened Less Than 1
Right Rear Door Is Closed 10-14
2 Brake Is On 10-14
Brake Is Off Less Than 1
6 Passenger Door Is Locked 10-14
Passenger Door Is Unlocked Less Than 1
10-15 At All Times 10-14
18 Driver Door Locked 10-14
Driver Door Unlocked Less Than 1
Connector I21
1, 8 & 11 At All Times 10-14
2 & 3 Ignition Switch In ON Position 10-14
4 & 6 (2) At All Times Less Than 1
7 Left Rear Door & Back Door Are Open Less Than 1
Left Rear Door & Back Door Are Closed 10-14
9 Ignition On & Headlight Switch In OFF Position 10-14
12 During Rear Wiper Operation Less Than 1
When Rear Wipers Are Stopped 10-14
14 Shifter In "P" Less Than 1
Shifter In Any Position Except "P" 10-14
(1) Measure voltage between body ECU connector I21 terminal No. 4 and specified terminal. See Fig 1.
(2) Measure voltage between body ground and specified terminals.
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