Circuit Description
DTC C1357 identifies a TCS motor circuit that shorts to ground. DTC C1357 will cause one of the following conditions:
| • | The TCS motor cannot be controlled at the commanded current rate. |
| • | The TCS motor driver circuit will allow current to go directly to ground. |
Conditions for Setting the DTC
DTC C1357 can set anytime.
A malfunction exists if the EBCM/EBTCM detects an out of range voltage on either of the left front TCS motor circuits indicating a short to ground.
Action Taken When the DTC Sets
| • | A malfunction DTC stores. |
| • | The TCS disables. |
| • | The amber TCS indicator turns on. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTC function is used. |
| • | 100 drive cycles pass with no DTC detected. |
Diagnostic Aids
Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual or Scan Tool Diagnostics located in this section for the procedure.
If the malfunction is not current, perform the following procedure in order to pinpoint identify an intermittent malfunction in the motor circuitry or connections:
- Wiggle the wires of the affected channel.
- Inspect to see if the DTC resets.
Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
| • | Backed out terminals |
| • | Improper mating |
| • | Broken locks |
| • | Improperly formed or damaged terminals |
| • | Poor terminal-to-wiring connections |
| • | Physical damage to the wiring harness |
Important: Zero the J 39200 test leads before making any resistance measurements.
Step | Action | Value(s) | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | |||||||||||||
2 | Does DTC C1357 occur intermittently? | -- | Go to Step 3 | |||||||||||||
3 |
Is continuity to ground present? | Go to Step 9 | Go to Step 4 | |||||||||||||
4 | Use J 39200 in order to measure the resistance between the 4-way TCS motor pack harness connector terminal B and ground. Is continuity to ground present? | Go to Step 10 | Go to Step 5 | |||||||||||||
5 | Use the J 39200 in order to measure the resistance between the TCS motor pack connector terminal A and ground. Is continuity to ground present? | Go to Step 8 | Go to Step 6 | |||||||||||||
6 |
Is there poor terminal contact, terminal corrosion, or terminal damage evident? | -- | Go to Step 11 | Go to Step 7 | ||||||||||||
7 |
Did DTC C1357 set as a current DTC in the last three drive cycles? | -- | Go to Step 12 | Go to Step 13 | ||||||||||||
8 | Replace the TCS motor pack. Is the repair complete? | -- | -- | |||||||||||||
9 | Repair the short to ground in CKT 564. Is the repair complete? | -- | -- | |||||||||||||
10 | Repair the short to ground in CKT 565. Is the repair complete? | -- | -- | |||||||||||||
11 | Replace all of the terminals or the connectors that exhibit the following conditions:
Is the repair complete? | -- | -- | |||||||||||||
12 | Replace the EBCM/EBTCM. Is the repair complete? | -- | -- | |||||||||||||
13 | The malfunction is intermittent or not present at this time? Is a concern still present? | -- | Go to Diagnostic Aids |
