Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Data Link Communications 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 4 | ||||||||
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 connector C1 terminal 17. 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 the heater and A/C control serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- | ||||||||
7 | Replace the EBTCM. 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 heater and A/C control. Does the scan tool communicate with the heater and A/C control? | -- | System OK | Go to Step 2 | ||||||||
10 |
Did you find and correct any conditions? | -- | Go to Step 9 | Go to Step 12 | ||||||||
11 | Replace the PSCM. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
12 | Replace the heater and A/C control. 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 SIR module. Is the replacement complete? | -- | Go to Step 9 | -- | ||||||||
16 | Test the serial data circuit, of the DLC, for a short to ground between terminal 12 and each module.
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 12 and each module.
Did you find a short to voltage in the serial data circuit? | -- | Go to Step 19 | Go to Step 2 | ||||||||
19 | Locate and repair the short to voltage in the serial data circuit. Is the repair complete? | -- | Go to Step 9 | -- |
