Code 0308

ON BOARD DIAGNOSIS LOGIC
* The closed loop control has the one trip detection logic





OVERALL FUNCTION CHECK
This procedure can be used for checking the overall function of the closed loop control. During this check, a DTC might not be confirmed.

With Consult
(1) Start engine and warm it up sufficiently.
(2) Select "MANU TRIG" and "HI SPEED" in "DATA MONITOR" mode with CONSULT and select "FRO2 MNTR-B1 (B2)".
(3) Hold engine speed at 2,000 rpm under no load during the following steps.
(4) Touch "RECORD" on CONSULT screen.
(5) Make sure of the following.
- "FR O2 MNTR-B1 (B2)" in "DATA MONITOR" mode changes from "RICH" to "LEAN" to "RICH" 5 times in 10 seconds. 5 times (cycles) are counted as shown below:

cycle | 1 | 2 | 3 | 4 | 5 |
FR O2 MNTR-B1 (B2) R-L-R-L-R-L-R-L-R-L-R

R = "FR O2 MNTR-B1 (B2)", "RICH"
L = "FR O2 MNTR-B1 (B2)", "LEAN"

OR

Without Consult
(1) Start engine and warm it up sufficiently.
(2) Make sure that malfunction indicator lamp goes on more than 5 times within 10 seconds while keeping at 2,000 rpm in Diagnostic Test Mode (Front heated oxygen sensor monitor).

DIAGNOSTIC PROCEDURE

For right bank
Refer to TROUBLE DIAGNOSIS FOR DTC P0130 (0503)
DTC P0130. P0130
DTC 0503. Code 0503

Refer to TROUBLE DIAGNOSIS FOR DTC P0135 (0901)
DTC P0135 P0135
DTC 0901. Code 0901

For left bank
Refer to TROUBLE DIAGNOSIS FOR DTC P0150 (0303)
DTC P0150. P0150
DTC 0303. Code 0303

Refer to TROUBLE DIAGNOSIS FOR DTC P0155 (1001)
DTC P0155. P0155
DTC 1001. Code 1001