Models With Malfunction Indicator Lamp
DIAGNOSTIC TROUBLE CODE (DTC) DISPLAY PROCEDURENOTE:
Not all systems with a Malfunction Indicator Lamp (MIL) will display Diagnostic Trouble Codes (DTC) through the MIL. Some require connecting an LED test light to the Data Link Connectors (DLC) to extract codes. On these systems, the LED will blink codes in the same manner as systems that use the MIL for display. To determine which system you are testing, activate DTC Memory, (see procedure below) and observe the MIL. If MIL does not blink a code, it will be necessary to connect an LED test light to extract codes. With this system the MIL is used only to inform the operator that a fault has been detected and a trouble code has been stored.
SET-UP PROCEDURE
1. Turn ignition switch OFF.
Data Link Connectors V8:
2. Remove floor covering in passenger side footwell to expose the auxiliary relay panel and the Data Link Connectors (DLC).
Extracting Diagnostic Trouble Codes Using LED Test Light:
3. Connect jumper wire with suitable flat-blade connectors and center bridge connector to lower terminals of black DLC 1 and white/brown DLC 2 as shown in image, do not connect bridge connector at this time.
Do-It-Yourself LED Test Light:
4. Connect LED test light, (if needed) to terminals of DLC 1 and 4 using suitable flat-blade connectors. Connect LED tester black lead (-) to the occupied terminal of yellow DLC 4 and LED tester red lead (+) to upper terminal of black DLC 1. (Federal and Canada vehicles only, California vehicles use jumper wire only, code display is via the MIL)
5. Check that fuse 27 in the fuse/relay panel is OK.
NOTE: DTC memory display should be carried out with engine RUNNING if possible. If engine does not run or will not start, proceed to ENGINE DOES NOT RUN procedure below as "ENGINE RUNS" procedure is different from "ENGINE DOES NOT RUN" procedure.
"ENGINE RUNS" DTC DISPLAY PROCEDURE
1. START engine and let idle.
2. With engine running, connect jumper wire bridge connectors (A and B) together for at least 4 seconds.
^ MIL or LED tester AND the transmission selector lever indicator in the dash must light up entirely.
^ IF NOT: check wires from DLC 2 and 4 to the Motronic ECM and Transmission Control Module (TCM) for open, or check LED tester connections.
3. Disconnect jumper wire bridge connector (A and B).
^ MIL or LED tester should start to blink codes.
^ At this time the transmission position indicator will show only 3rd gear, this confirms ECM in "limp home mode".
4. Count and record codes as they are displayed on the MIL or LED tester.
Reading Fault Codes:
5. Each blink code is comprised of 4 flashing pulse groups with a maximum of 4 pulses per group.
6. Add the pulses of each group to determine the code being blinked via the MIL or LED.
7. Between each flashing pulse group (one code) there is a pause (light OFF) of approximately 2.5 seconds before the next code begins to blink.
8. After all stored codes have been displayed, code 0000 (end of output) will display.
^ Code 0000 display --- 2.5 second flash (zero) at 2.5 second intervals.
9. If no codes are present, code 4444 will display.
10. Refer to Diagnostic Trouble Code Charts for explanation of codes. Engine Control System
"ENGINE DOES NOT RUN" DTC DISPLAY PROCEDURE
1. Crank engine for 5 to 6 seconds, leave ignition switch ON after cranking. Ignition switch MUST be left ON for entire procedure, failure to do so makes test invalid.
CAUTION: Do not crank engine for longer than 15 seconds. Allow one minute between crank attempts, for starter motor to cool-down.
2. Connect jumper wire bridge connectors (A and B) together for at least 4 seconds.
^ MIL or LED tester AND the transmission selector lever indicator in the dash must light up entirely.
^ IF NOT: check wires from DLC 2 and 4 to the Motronic ECM and Transmission Control Module (TCM) for open, or check LED tester connections.
3. Disconnect jumper wire bridge connector (A and B).
^ MIL or LED tester should start to blink code.
^ At this time the transmission position indicator will show only 3rd gear, this confirms ECM in "limp home mode".
4. Count and record code as it is displayed on the MIL or LED tester.
Reading Fault Codes:
5. Each blink code is comprised of 4 flashing pulse groups with a maximum of 4 pulses per group.
6. Add the pulses of each group to determine the code being blinked via the MIL or LED.
7. Code 2111 must be displayed.
NOTE: Code 2111 (engine speed sensor) is always displayed when ignition switch is ON and engine is not running. This fault display is normal and can be ignored when engine is not running.
8. Repeat steps 2 and 3 above to display next code as only one code will be displayed for each activation.
9. Continue repeating steps 2 and 3 until code 0000 (end of output) is displayed.
^ Code 0000 display --- 2.5 second flash (zero) at 2.5 second intervals.
10. Refer to Diagnostic Trouble Code Charts for explanation of codes. Engine Control System