User:Saul/soarer

These are my notes for the Toyota Soarer.

Specifications

The Soarer that I have been working on has the following specifications:

• Right side drive
• Factory manual
• 1JZ Motor
• R154 Gearbox

Ecu wiring

An extremely useful doc for the wiring to the ecu can be found here.
Main ecu plugs:

C88

Pin #	Symbol	Color (Primary/Stripe)
1	/	/
2	/	/
3	HT	Red/Blue
4	KNK2	(See-through copper)
5	KNK1	(See-through copper)
6	/	/
7	EVAP	Green/Black
8	#30	Black
9	#20	Black/Yellow
10	#10	Yellow
11	S1	?
12	IGF	Red/Yellow
13	STA	Black/White
14	NSW	?
15	IGT3	Blue/Black
16	IGT2	Red/Blue
17	S2	?
18	/	/
19	VF	Grey/Yellow
20	ISCV4	Blue/White
21	ISCV3	Green/Yellow
22	ISCV2	Green/Black
23	ISCV1	Purple/Red
24	IGT1	Red/White
25	/	/
26	IGT4	Blue/White
27	S3	?
28	E11	Brown
29	IGT6	Red/Black
30	IGT5	Red/Green
31	IDL2	Brown
32	IDL1	Red
33	EO2	White/Black
34	E01	White/Black

C84

Pin #	Symbol	Color (Primary/Stripe)
1	VCC	Blue/Red
2	/	/
3	NCO-	?
4	SP2-	?
5	NE	Blue/Green
6	NE-	Blue/Yellow
7	VTA1	Yellow
8	PIM	Green/Black
9	SP2+	?
10	G1	Orange
11	G1-	White
12	VTA2	Blue/Red
13	OX1	White
14	THA	Yellow/Black
15	NCO+	?
16	G2	Orange/Blue
17	G2-	White/Blue
18	/	/
19	/	/
20	THW	Green
21	/	/
22	E2	Brown

C85

Pin #	Symbol	Color (Primary/Stripe)
1	NEO	?
2	M-REL	Black/Red
3	W	Blue/Yellow
4	FPC	Red/Green
5	TE1	Green
6	TR	?
7	VTO1	?
8	/	/
9	/	/
10	DI	Pink
11	VTO2	?
12	/	/
13	/	/
14	ABS	Red/Yellow
15	/	/
16	E1	Brown

C86

Pin #	Symbol	Color (Primary/Stripe)
1	TT	?
2	L	?
3	P	?
4	/	/
5	ACMG	White
6	OD2	?
7	OD1	?
8	EGW	White/Red
9	IGSW	Black/Orange
10	2	?
11	TE2	Green/Yellow
12	SP1	Pink
13	CCO	Green
14	BATT	Black/Yellow
15	/	/
16	/	/
17	L3	?
18	L2	?
19	L1	?
20	A/C	Blue/Red
21	/	/
22	+B	Black/Red
23	+B1	Black/Red
24	/	/
25	STP	Green/White
26	/	/
27	/	/
28	ELS	Red/Yellow

Speedometer

Wiring

Speed Sensor

The speed sensor is located on the right rear side of the gearbox.
The sensor will not operate without 12v power. The speed sensor has 3 wires labeled 1, 2 and 3.

1. This wire gets 12v feed to it when the key turns.
2. This wire connects to ground.
3. This wire is the signal output - square wave 4 cycles per wheel turn pulsing from 0v to 12v.

Dash

The 3rd wire from the speed sensor goes into the loom up near the engine through the fire wall down underneath the glovebox and through to behind the dash.
This 3rd wire was blue with a red stripe.
The wire connects to the back of the digital dash - this is where it gets converted to the speed.
The dash has a pink wire the comes out and goes to the main ecu.

Ecu

The ecu uses the pink wire (speed signal from the dash) for traction control.
Be careful as there are two similar pink wires going to the main ecu one is for the fuel pump which appears to output around 12v when the fuel pump is running.
The pink wire (speed signal) may not be needed on some after market ecu's.

Debugging

The following steps may be helpful when debugging a speedometer problem:

Speed Sensor

First check if the speed sensor works:

Check Reading

Unplug the sensor at the back right of the gearbox.
Connect small alligator clips to each pin on the sensor - make sure they are insulated and not touching each other!
Look at the plug that you pulled off to determine what pin is what.
Connect 12v power to the pin labeled "1".
Connect the ground and the negative side of the multimeter to the middle pin - "2".
Connect the positive side of the multimeter to the last pin - "3".
Spin the rear wheels of the car and see if you get a voltage output on the multimeter - it should pulse from 0v to 12v.
If this is done correctly and you do not get an output it is likely that the sensor has stopped working and a replacement is needed.

Check Power

Connect the multimeter to the plug of the sensor:

• Negative on the middle pin - "2".
• Positive on the pin "1".

Turn the key to the on position.
The multimeter should read 12v.
If this is done correctly and the multimeter does not read 12v try:

• Check continuity between the middle pin - "2" and ground.
• Check continuity between the pin "1" and the ignition power.

Dash

If the sensor appears to be working fine, remove the dash and:

• Try checking the continuity of the pin "3" (blue with red stripe) with the same colored wire going into the back of the dash. (Note: there are two of these wires but only one is connected)
• Check the pink wire coming out of the dash (sp1 - speed signal) is not grounded or connected where it shouldn't be.
• Check that the blue/red wire going into the dash is not grounded (my problem).
• Check the voltage between the blue/red wire going into the dash has voltage between it and ground when the key is turned on and the wheels are spinning.

If none of these are the issue it is likely that the dash is faulty.