Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Data Link Communications Diagnostic System Check performed? | -- | Go to Step 2 | |||||||||
2 | Attempt to establish communication with the other modules connected to the circuit.
Does the scan tool communicate with the other modules? | -- | Go to Step 3 | Go to Step 20 | ||||||||
3 |
Does the resistance measure less than the specified value? | .5 ohms | Go to Step 5 | Go to Step 6 | ||||||||
4 |
Does the scan tool communicate with the other modules? | -- | Go to Step 7 | Go to Step 8 | ||||||||
5 | Inspect for poor connections at terminal 24. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Did you find and correct the poor connection condition? | -- | Go to Step 9 | Go to Step 10 | ||||||||
6 | Locate and repair an open in CKT XM500 (BRN/WHT). Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
7 | Replace the ECM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
8 |
Does the scan tool communicate with the other modules? | -- | Go to Step 12 | Go to Step 13 | ||||||||
9 | Attempt to establish communications with the instrument cluster. Does the scan tool communicate with the instrument cluster? | -- | System OK | -- | ||||||||
10 |
Did you find and correct any conditions? | -- | Go to Step 9 | Go to Step 15 | ||||||||
11 | Replace the TCM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
12 | Replace the MSM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
13 |
Does the scan tool communicate with the other modules? | -- | Go to Step 11 | Go to Step 14 | ||||||||
14 |
Does the scan tool communicate with the other modules? | -- | Go to Step 15 | Go to Step 16 | ||||||||
15 | Replace the instrument cluster. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
16 |
Did you find a short to ground in the serial data circuit? | -- | Go to Step 17 | Go to Step 18 | ||||||||
17 | Locate and repair the short to ground in the serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
18 | Test the serial data circuit, of the DLC, for a short to voltage between terminal 7 and each module. (Turn ON the ignition, leaving the engine OFF, when testing for a short to voltage.)
Did you find a short to voltage in the serial data circuit? | -- | Go to Step 19 | Go to Step 21 | ||||||||
19 | Locate and repair the short to voltage in the serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
20 |
Did you find and correct a poor connection condition? | -- | Go to Step 2 | Go to Step 4 | ||||||||
21 | Test the serial data circuit, of the DLC, for an open between terminal 7 and each module. Refer to Testing for Continuity in Wiring Systems.
Did you find an open in the serial data circuit? | -- | Go to Step 9 | -- |
