Meter Gauge Display. Meter / Gauge System Speed Signal Circuit

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

Meter Gauge Display. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - RADIO RECEIVER OR RADIO AND DISPLAY OR NAVIGATION RECEIVER)

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - TCM)

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - THEFT WARNING ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

CHECK ENGINE TYPE

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - ECM)

CHECK HARNESS AND CONNECTOR

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - COMBINATION METER ASSEMBLY)

CHECK COMBINATION METER ASSEMBLY

METER / GAUGE SYSTEM - Speed Signal Circuit

DESCRIPTION

The vehicle speed signal consists of pulses sent to the combination meter assembly from the speedometer sensor.

NOTICE:

If the speedometer operation is not normal, refer to "Speedometer Malfunction" (HILUX_TGN26 RM0000011IY01VX.html).

WIRING DIAGRAM

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Speed Signal Circuit

INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

Disconnect the 2Q driver side junction block assembly connector.

Disconnect the 2P driver side junction block assembly connector.

Measure the voltage according to the value(s) in the table below.

HINT:

If the voltage is not as specified, it is possible that an ECU or circuit has a malfunction. The malfunctioning ECU or circuit will be diagnosed in the following steps.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
2Q-4 - Body ground1, 2, *3	Ignition switch ON	4.5 to 14 V
2Q-10 - Body ground4, 5	Ignition switch ON	4.5 to 14 V
2P-4 - Body ground*6	Ignition switch ON	4.5 to 14 V
2P-10 - Body ground*7	Ignition switch ON	4.5 to 14 V
2P-26 - Body ground	Ignition switch ON	4.5 to 14 V

*1: for Radio Receiver Type
*2: for Radio and Display Type
*3: w/ Navigation System
*4: for 1KD-FTV
*5: for Automatic Transmission
*6: w/ Theft Deterrent System
*7: w/ Automatic Air Conditioning System

Text in Illustration
*a	Front view of wire harness connector (to Junction Connector)

Result
Result	Proceed to
Voltage is not as specified in one circuit	A
Voltage is as specified in all circuits	B

Go to step 10

A

2.SYSTEM CHECK

Select the circuit for which the voltage was not as specified in the previous step.

Result
Tester Connection	System that Uses the Circuit	Proceed to
2Q-4 - Body ground1, 2, *3	Audio and visual system	A
2Q-10 - Body ground4, 5	Automatic transmission system	B
2P-4 - Body ground*6	Theft deterrent system	C
2P-10 - Body ground*7	Automatic air conditioning system	D
2P-26 - Body ground	SFI system8 or ECD system4, *9	E

*1: for Radio Receiver Type
*2: for Radio and Display Type
*3: w/ Navigation System
*4: for 1KD-FTV
*5: for Automatic Transmission
*6: w/ Theft Deterrent System
*7: w/ Automatic Air Conditioning System
*8: for 2TR-FE, 2TR-FBE, 1GR-FE
*9: for 2KD-FTV

A

3.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - RADIO RECEIVER OR RADIO AND DISPLAY OR NAVIGATION RECEIVER)

*1: for Radio Receiver Type
*2: for Radio and Display Type
*3: w/ Navigation System

Disconnect the 2Q driver side junction block assembly connector.

Disconnect the G1 radio receiver assembly*1 or G127 radio and display receiver assembly*2 connector.

Disconnect the G152 navigation receiver assembly*3 connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
2Q-4 - G1-17 (SPD)*1	Always	Below 1 Ω
2Q-4 - G127-17 (SPD)*2	Always	Below 1 Ω
2Q-4 - G152-17 (SPD)*3	Always	Below 1 Ω
G1-17 (SPD) - Body ground*1	Always	10 kΩ or higher
G127-17 (SPD) - Body ground*2	Always	10 kΩ or higher
G152-17 (SPD) - Body ground*3	Always	10 kΩ or higher

Result
Result	Proceed to
NG	A
OK (for Radio Receiver Type)	B
OK (for Radio and Display Type)	C
OK (w/ Navigation System)	D

REPLACE RADIO RECEIVER ASSEMBLY (HILUX_TGN26 RM000003OG900VX.html)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (HILUX_TGN26 RM000003OG900VX.html)

REPLACE NAVIGATION RECEIVER ASSEMBLY (HILUX_TGN26 RM000003O1L009X.html)

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - TCM)

Disconnect the 2Q driver side junction block assembly connector.

Disconnect the G41 TCM connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
2Q-10 - G41-25 (SPD1)
Always
Below 1 Ω
G41-25 (SPD1) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE TCM (HILUX_TGN26 RM000004ROZ00CX.html)

5.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - THEFT WARNING ECU ASSEMBLY)

Disconnect the 2P driver side junction block assembly connector.

Disconnect the G29 theft warning ECU assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
2P-4 - G29-17 (SPD)
Always
Below 1 Ω
G29-17 (SPD) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE THEFT WARNING ECU ASSEMBLY (HILUX_TGN26 RM000004QXI00GX.html)

6.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

Disconnect the 2P driver side junction block assembly connector.

Disconnect the G94 air conditioning amplifier assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
2P-10 - G94-9 (SPD)
Always
Below 1 Ω
G94-9 (SPD) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (HILUX_TGN26 RM000001K3A024X.html)

7.CHECK ENGINE TYPE

Check the engine type.
Result
Result
Proceed to
for Gasoline Engine
A
for Diesel Engine
B

Go to step 9

A

8.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - ECM)

Disconnect the 2P driver side junction block assembly connector.

Disconnect the G154*1, G88*2 or G146*3 ECM connector.
1. *1: for 1GR-FE
2. *2: for 2TR-FE
3. *3: for 2TR-FBE

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for 1GR-FE
Tester Connection
Condition
Specified Condition
2P-26 - G154-8 (SPD)
Always
Below 1 Ω
G154-8 (SPD) - Body ground
Always
10 kΩ or higher
for 2TR-FE
Tester Connection
Condition
Specified Condition
2P-26 - G88-8 (SPD)
Always
Below 1 Ω
G88-8 (SPD) - Body ground
Always
10 kΩ or higher
for 2TR-FBE
Tester Connection
Condition
Specified Condition
2P-26 - G146-16 (SPD)
Always
Below 1 Ω
G146-16 (SPD) - Body ground
Always
10 kΩ or higher
Result
Result
Proceed to
NG
A
OK (for 1GR-FE)
B
OK (for 2TR-FE)
C
OK (for 2TR-FBE)
D

REPLACE ECM (HILUX_TGN26 RM000000VW202SX.html)

REPLACE ECM (HILUX_TGN26 RM000000VW202TX.html)

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HARNESS AND CONNECTOR

Disconnect the 2P driver side junction block assembly connector.

Disconnect the G38*1, G148*2 or G156*3 ECM connector.
1. *1: for 1KD-FTV, 2KD-FTV
2. *2: for 1KD-FTV, 2KD-FTV (for DPF)
3. *3: for 1KD-FTV (for i-ART)

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
for 1KD-FTV, 2KD-FTV
Tester Connection
Condition
Specified Condition
2P-26 - G38-17 (SPD)
Always
Below 1 Ω
G38-17 (SPD) - Body ground
Always
10 kΩ or higher
for 1KD-FTV, 2KD-FTV (for DPF)
Tester Connection
Condition
Specified Condition
2P-26 - G148-30 (SPD)
Always
Below 1 Ω
G148-30 (SPD) - Body ground
Always
10 kΩ or higher
for 1KD-FTV (for i-ART)
Tester Connection
Condition
Specified Condition
2P-26 - G156-30 (SPD)
Always
Below 1 Ω
G156-30 (SPD) - Body ground
Always
10 kΩ or higher
Result
Result
Proceed to
NG
A
OK (for 1KD-FTV)
B
OK (for 2KD-FTV)
C

REPLACE ECM (HILUX_TGN26 RM0000013Z001IX.html)

REPLACE ECM (HILUX_TGN26 RM0000013Z001HX.html)

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - COMBINATION METER ASSEMBLY)

Disconnect the 2Q driver side junction block assembly connector.

Disconnect the G19 combination meter assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
2Q-26 - G19-6 (+S)
Always
Below 1 Ω
G19-6 (+S) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.CHECK COMBINATION METER ASSEMBLY

Check the output waveform.
1. Reconnect the G19 combination meter assembly connector.
2. Remove the combination meter assembly with the connector(s) still connected.
3. Connect an oscilloscope to terminal G19-6 (+S) and body ground.
4. Turn the ignition switch to ON.
5. Check the signal waveform according to the condition(s) in the table below.
  Measurement Condition
  Item
  Condition
  Tester Connection
  G19-6 (+S) - Body ground
  Tool Setting
  5 V/DIV., 20 msec./DIV.
  Condition
  Driving at approximately 20 km/h (12 mph)
  Text in Illustration
  *a
  Component with harness connected
  (Combination Meter Assembly)

REPLACE COMBINATION METER ASSEMBLY (HILUX_TGN26 RM000000THS02OX.html)

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Result	Proceed to
NG	A
OK (for 1GR-FE)	B
OK (for 2TR-FE)	C
OK (for 2TR-FBE)	D

Item	Condition
Tester Connection	G19-6 (+S) - Body ground
Tool Setting	5 V/DIV., 20 msec./DIV.
Condition	Driving at approximately 20 km/h (12 mph)