4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS Tech 2 Parameter
Units
Idle
1500rpm
2000rpm
Description
6E–89
18
Brake Switch 2
Active/ Inactive
Inactive
Inactive
Inactive
This displays operating status of the brake switch. This should display "Active" when the brake pedal is stepped on.
19
Clutch Switch
Active/ Inactive
Inactive
Inactive
Inactive
This displays operating status of the clutch switch. This should display "Active" when the clutch pedal is stepped on.
20
Neutral Switch
On/Off
On
On
On
This displays operating status of the neutral switch. This should display "On" when the gear position is neutral.
21
A/C Switch
Active 12V/ Inactive 0V
Inactive 0V
Inactive 0V
Inactive 0V
This displays the air conditioner request signal. This should display "Active 12V" when the air conditioner switch is switched on.
22
Diagnostic Request
Active 0V/ Inactive 12V
Inactive 12V
Inactive 12V
Inactive 12V
This displays the diagnostic request signal. This should display "Inactive 12V" when the Tech 2 is connected.
23
System Voltage
V
10 - 14
10 - 14
10 - 14
This displays the system voltage measured by the ECM at ignition feed.
24
Main Relay
Active/ Inactive
Active
Active
Active
This displays operating status for the ECM main relay. This should display "Active" when the key switch is turned on and while engine is running.
25
Glow Time Relay
Active 0V/ Inactive12V
Inactive 12V
Inactive 12V
Inactive 12V
This displays operating status for the glow relay. This should display "Inactive 12V" when the engine is warm upped.
26
Check Engine Light
On/Off
Off
Off
Off
This displays operating status for the Check Engine Lamp. This should display "On" when the Check Engine Lamp is turned on.
27
Glow Time Telltale
On/Off
Off
Off
Off
This displays operating status for the glow indicator lamp. This should display "On" when the glow lamp is turned on.
28
Desired Engine Idle Speed
rpm
730
730
730
The desired engine idle speed that the ECM commanding. The ECM compensates for various engine loads based on engine coolant temperature.
29
A/C Request
Active 0V/ Inactive 12V
Inactive 12V
Inactive 12V
Inactive 12V
This displays operating status of the A/C compressor. This should display "Active 0V" when the compressor relay is operated.
30
Immobilizer
Active/ Inactive
Inactive
Inactive
Inactive
This should display "Inactive" when the immobilizer is correctly operated.
31
Immobilizer Signal
Received/ Not Received
Not Received
Not Received
Not Received
This should display "Not Received" when the immobilizer is not activated.
32
Immobilizer Function Programmed
Yes/ No
Yes
Yes
Yes
This should display "Yes" when the immobilizer is correctly programmed.
33
EGR Pulse (Exhaust Recirculation)
%
70
70
70
This displays the duty signal from the ECM to control the EGR flow amount.
Information
Ratio Gas