Circuit Description
DTC C1213 tests the state of the ABS (LOW TRAC) active indicator. DTC C1213 identifies a situation in which the driver could not be warned of a low traction event by the ABS warning indicator, or the ABS warning indicator is always on. The EBCM provides a ground through CKT 1656 in order to turn the ABS warning indicator on. If the control line CKT 1656 is open or shorted to voltage the ABS indicator will always remain off. If the control line CKT 1656 is shorted to ground the ABS active indicator remains on when the ignition is in the RUN position.
Conditions for Setting the DTC
DTC C1213 sets only during one of the following conditions:
| • | The three second bulb check |
| • | The indicator turns on. |
A malfunction exists if the EBCM cannot control the ABS active (LOW TRAC) indicator for two seconds.
Action Taken When the DTC Sets
| • | A malfunction DTC stores. |
| • | The ABS does not disable. |
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(s) detected. |
Diagnostic Aids
The following conditions may cause an intermittent malfunction:
| • | A poor connection |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Use the Scan Tool Lamp Test function in order to command the indicator on while looking for an intermittent malfunction in the ABS active (LOW TRAC) indicator circuitry.
Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual for the procedure.
Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:
| • | 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. Refer to the J 39200 user's manual.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |||||||
2 |
Do not start the engine. Can the ABS active indicator (LOW TRAC) be turned on and off? | -- | ||||||||
3 |
Do not start the engine. Does the ABS active indicator turn on and stay on? | -- | ||||||||
4 |
Do not start the engine. Does the ABS active indicator turn on? | -- | ||||||||
5 |
Are there signs of poor terminal contact, corrosion, or a damaged terminal? | -- | ||||||||
6 |
Do not start the engine. Does DTC C1213 reset? | -- | Go to Diagnostic System Check | |||||||
7 |
Do not start the engine. Do the ABS and/or the BRAKE indicators turn on and then off? | -- | ||||||||
8 |
Do not start the engine. Does the ABS active indicator turn on? | -- | ||||||||
9 |
Is the resistance within the specified range? | 0-2 ohms | ||||||||
10 |
Do not start the engine. Is the voltage within the specified range? | 0-2 V | Go to Instrument Cluster System Check in Instrument Panel, Gauges, and Console | |||||||
11 |
Is the fuse block Fuse 39 (5A) open? | -- | ||||||||
12 | Use the J 39200 in order to measure the resistance between the fuse block terminal C2 and the ground. Refer to Testing for Continuity in Wiring Systems. Is the resistance within the specified range? | 0-2 ohms | ||||||||
13 | Repair the short to ground in CKT 39. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |||||||
14 | Repair the open in CKT 39. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
15 | Replace the fuse block Fuse 39 (5A) with a known good Fuse (5A). Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
16 | Repair the short to ground in CKT 1656. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
17 | Repair the 24-way EBCM connector C1. Refer to Refer to Connector Repairs in Wiring Systems.. Is the repair complete? | -- | -- | |||||||
18 | Repair the open or high resistance in CKT 1656. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
19 | Repair the short to voltage in CKT 1656. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
20 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
21 | The malfunction is intermittent or is not present at this time. Is the action complete? | -- | Refer to Diagnostic Aids | -- |
