Fault Code Procedure

Fig. 27 Fuse Inserted In Fuel Pump Relay:

NOTE: Do not switch ignition OFF at any time before or during the testing procedure. This will erase the fault memory.
The diagnosis procedure will be cancelled if the engine speed is raised above 2000 rpm after the code extraction procedure has begun, or if the ignition is turned OFF.
1. To test for input faults, the vehicle must be driven for a minimum of 5 minutes. During the test drive, the engine must briefly:
Rise above 3000 rpm,
Intake manifold pressure must rise above 1.0 bar (0 in. vacuum).
This is to ensure that all necessary information is stored in the fault memory.
2. If the vehicle has a no-start condition, crank the engine with the starter for at least 5 seconds.
3. With the engine idling or with the ignition ON after cranking with the starter (for a no-start case), insert a spare fuse into the socket on top of the fuel pump relay, Fig. 27, for at least 4 seconds.
4. Remove the fuse and read the fault code from the indicator light in the instrument cluster.

Fig. 5 Fault code explanation:

5. Make a note of the fault code.
Each fault code consists of 4 blink pulse groups of up to 4 blink pulses each. Between each group of blink pulses there is a pause of about 2.5 seconds.
The various fault codes are read by counting the number of pulses in each group (1 to 4), and then combining the 4 groups. See Fig. 5.
Once the diagnostic procedure is activated, the display will proceed as follows:
a. Starting signal (light on 2.5 sec)
b. Pause (light off 2.5 sec)
c. Transmission of the 4 impulse groups
d. After the fourth impulse group, a 2.5 sec. pause (light off)
e. Repeat the fault code.
6. Reinsert the fuse into the fuel pump relay for at least 4 seconds to view the next fault code. Stored fault codes will be displayed one at a time, and in sequence.
7. Once all faults have been identified, correct as necessary. After the fault has been corrected, repeat the test drive and diagnosis procedure to make sure no other faults are present.