Volkswagen Golf / Golf GTI / Golf Variant. Manual — part 87
5 - Repeat the drive cycle operation until all engine monitors
have successfully run through and passed.
6 - Remove the scan tool and switch the ignition off.
3.3
Diagnostic Modes 01 - 0A
The information provided in Modes 01 through 0A displays the
various levels of emission related data that may be monitored, as
well as the ability to retrieve and read stored DTCs, erase stored
DTCs, generate readiness codes, and select the various PIDs
and Test IDs used within the modes to monitor the engine, and
emission related component parameters.
♦
⇒ “3.3.1 Diagnostic Mode 01 - Read Current System Data”,
♦
⇒ “3.3.2 Diagnostic Mode 02 - Read Operating Conditions”,
♦
⇒ “3.3.3 Diagnostic Mode 03 - Read DTC Memory”,
♦
⇒ “3.3.4 Diagnostic Mode 04 - Erase DTC Memory”,
♦
⇒ “3.3.5 Diagnostic Mode 05 - Read Oxygen Sensor Monitor‐
♦
⇒ “3.3.6 Diagnostic Mode 06 - Read Test Results for Specific
Diagnostic Functions, 2014 - 2015 MY’s”, page 27
♦
⇒ “3.3.7 Diagnostic Mode 06 - Read Test Results for Specific
Diagnostic Functions, 2016 MY”, page 34
♦
⇒ “3.3.8 Diagnostic Mode 07 - Read Faults Detected During
the Current or Last Driving Cycle”, page 41
♦
⇒ “3.3.9 Diagnostic Mode 08 - Request Control of On-Board
System, Test or Component”, page 42
♦
⇒ “3.3.10 Diagnostic Mode 09 - Read Vehicle Information”,
♦
⇒ “3.3.11 Diagnostic Mode 0A - Check Permanent DTC Mem‐
3.3.1
Diagnostic Mode 01 - Read Current Sys‐
tem Data
Note
Depending on scan tool and protocol used, the information in di‐
agnostic mode 01 may be referred to by different names such as
Test-ID (TID), Hex-ID, Component-ID (CID), or On-Board Diag‐
nostic Monitor Identifier (OBDMID).
Diagnostic Mode 01 makes it possible to access current emis‐
sions-related measured values and diagnostic data. The original
measured values (no replacement values), input and output data
and system status information are displayed using Diagnostic
Mode 1.
Test requirement
• Coolant temperature at least 80° C.
Procedure
– Connect the scan tool.
– Start the engine and run at idle.
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– Select “Diagnostic Mode 1: Obtain data.”.
– From the following table, select the desired the “PID” that is to
be monitored, e.g. “PID $05 Coolant temperature”.
The current values of the component or system that is being
monitored will be displayed on the scan tool screen.
PID
Component or System
$00:
Supported PIDs $01 – $20
$01:
Monitoring Status Since Erasing Dtc Memory
$03:
Fuel System Status
$04:
Calculated Load Value
$05:
Coolant Temperature
$06:
O2 Sensor Bank 1
$07:
O2 Sensor Adaptation Value Bank 1
$0B:
Manifold Pressure
$0C:
Engine Speed
$0D:
Vehicle Speed
$0E:
Ignition Angle Cylinder 1
$0F:
Intake Air Temperature
$11:
Absolute Throttle Position
$12:
Secondary Air Status
$13:
Location of Oxygen Sensors
$15:
O2 Sensor Voltage (Jump Probes)
$1C:
OBD Requirements
$1F:
Time Since Engine Start
$20:
Supported PIDs $21 – $40
$21:
Distance Driven With Mil On
$23:
Fuel (Rail) Pressure
$2E:
Fuel Tank Vent Valve Control
$2F:
Fuel Tank Level
$30:
Number Of Warm Up Cycles Since Fault Memory Cleared
$31:
Distance Driven After Erasing Fault Memory
$33:
Ambient Air Pressure
$34:
O2 Sensor Voltage (Linear Probes)
$3C:
Catalyst Temperature Bank 1 Sensor 1
$40:
Supported PIDs $41 – $60
$41:
Diagnostic Status In This Cycle
$42:
Engine Control Module System Voltage
$43:
Absolute Load Value
$44:
Lambda Value
$45:
Relative Throttle Position
$46:
Ambient Air Temperature
$47:
Absolute Throttle Position (Redundant)
$49:
Accelerator Pedal Position 1 Absolute
$4A:
Accelerator Pedal Position 2 Absolute (Redundant)
$4C:
Throttle Position Set Point
$51:
Fuel Type
$56:
Offset Lambda Control Behind Catalyst, Bank 1
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PID
Component or System
$60:
Supported PIDs $61 – $80
$70:
Boost Pressure Control
– Switch the ignition off.
3.3.2
Diagnostic Mode 02 - Read Operating
Conditions
When an emissions-related fault (pending DTC, visible in mode
07) is first detected, operating conditions are stored. Mode 02
makes it possible to access this freeze frame data as soon as this
fault is shown in mode 03. Each control module only shows freeze
frame data for one fault via mode 02. Therefore, there are two
priority levels. If there is a malfunction with higher priority, the
freeze frame data is overwritten.
– Fault with higher priority: Misfire malfunction or fuel trim mal‐
function.
– Fault with normal priority: All other emissions-related faults.
Note
Depending on scan tool and protocol used, the information in di‐
agnostic mode 02 may be referred to by different names such as
Test-ID, Hex-ID, Component-ID, or On-Board Diagnostic Monitor
Identifier (OBDMID).
Procedure
– Connect the scan tool.
– Start the engine and run at idle.
Note
If the engine does not start, crank the engine using starter for at
least 5 seconds, do not switch the ignition off afterward.
– Select “Diagnostic Mode 2: Obtain operating conditions.”.
– From the following table, select the desired the “PID”, e.g. “PID
$05 Coolant temperature” that is to be monitored.
The current values of the component or system that is being
monitored will be displayed on the scan tool screen.
PID
Component or System
$00:
Supported PIDs $01 – $1F
$02:
DTC Which Triggered Freeze Frame Data
$03:
Fuel System Status
$04:
Calculated Load Value
$05:
Coolant Temperature
$06:
O2 Sensor Bank 1
$07:
O2 Sensor Adaptation Value Bank 1
$0B:
Manifold Pressure
$0C:
Engine Speed
$0D:
Vehicle Speed
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PID
Component or System
$0E:
Firing Angle Cylinder 1
$0F:
Intake Air Temperature
$11:
Absolute Throttle Position 1
$12:
Secondary Air Status
$1F:
Time Since Engine Start
$20:
Supported PIDs $21 – $3F
$23:
Fuel Pressure (Rail Pressure)
$2E:
Fuel Tank Vent Valve Control
$2F:
Fuel Tank Level
$33:
Ambient Air Pressure
$40:
Supported PIDs $41 – $5F
$42:
Engine Control Module System Voltage
$43:
Absolute Load Value
$44:
Lambda Value
$45:
Relative Throttle Position
$46:
Ambient Air Temperature
$47:
Absolute Throttle Position 2
$49:
Accelerator Pedal Position 1 Absolute
$4A:
Accelerator Pedal Position 2 Absolute
$4C:
Throttle Position Set Point
$51:
Fuel Type
$56:
Offset Lambda Control Behind Catalyst, Bank 1
$60:
Supported PIDs $61 – $80
$70:
Boost Pressure Control
– Switch Ignition OFF
3.3.3
Diagnostic Mode 03 - Read DTC Mem‐
ory
Diagnostic Mode 03 makes it possible to read emissions-related
faults (confirmed DTCs; faults which have activated the MIL) in
the ECM and in the TCM.
When the ECM recognizes an emissions-related fault in two con‐
secutive drive cycles, it sends a request to the instrument cluster
over the CAN to turn on the malfunction indicator lamp. If an elec‐
tronic throttle malfunction is recognized, the ECM will send a
request to the instrument cluster over the CAN to turn on the
electronic power control warning lamp.
The DTCs are sorted by SAE code with the DTC tables consisting
of a 5-digit alphanumeric value.
Note
Depending on the scan tool and protocol used, diagnostic mode
03 and the information provided may be referred to by a different
name.
The following tables provide a breakdown and explanation of the
DTC code.
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