Work step: 10 Diagnostic test: Three Way Catalytic Converter (TWC)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Display will appear as shown

Fig 1: Identifying Scan Tool Display - Function 15, Work Step 10 (1 Of 2)

Press -1-, -3- and -6- buttons to input display group 136.
Press -Q- button to enter input.

Display will appear as shown (1 to 4 = display fields)

Fig 2: Identifying Scan Tool Display - Function 15, Work Step 10 (2 Of 2)

Increase engine speed between 2500 and 3500 RPM, check specifications after 120 seconds.

DISPLAY GROUP: 136, FUNCTION: 04

	Display fields
	1	2	3	4
Display group: 136, Function: 04
Display	xxxx rpm	xxx.x °C	x.xx	xxxx xxxx
Indicated	Engine speed	Three way catalytic converter temperature	Three way catalytic converter efficiency	Diagnostic conditions
Specification	2500 to 3500 rpm	At least 360 °C	0.15 max.	1111 x100 x = Not relevant
Specification	2500 to 3500 rpm	At least 360 °C	0.15 max.	1111 x100 x = Not relevant
Working range	650 to 5500 rpm	0.0 to 999.9 °C

RELEVANCE OF 8 DIGIT NUMBER BLOCK IN DISPLAY FIELD 4

Relevance of 8 digit number block in display field 4
1	2	3	4	5	6	7	8	Specifications of diagnostic conditions
1								Oxygen sensor control before TWC active
	1							TWC has its minimum temperature
		1						Load range OK.
			1					Heated oxygen sensor after TWC operationally ready
					1			CYCLE Bit = Diagnosis completed
						0		Diagnosis malfunction free
							0	DTC memory malfunction free

Press -C- button.