B2188

B2188-IGNITION START CONTROL CIRCUIT LOW







- When Monitored:
With the ignition in the Start position.

- Set Condition:
The Totally Integrated Power Module (TIPM) detects a short to ground condition in the (F962) Fused Ignition Switch Output (Start) circuit.





1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Using the scan tool, read the DTCs.
2. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 10 seconds.
3. Using the scan tool, read the DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out or corroded terminals.

2. CHECK TIPM FOR INTERNAL SHORT




1. Turn the ignition off.
2. Disconnect the TIPM C5 harness connector.
3. Turn the ignition on, wait 30 seconds.
4. Using the scan tool, read TIPM DTCs.

Does the scan tool display this DTC as active?

Yes

- Replace the TIPM.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Go To 3

3. VEHICLE EQUIPPED WITH DIESEL OR GAS ENGINE

Which type of engine is the vehicle equipped with?

Gas

- Go To 4

Diesel

- Go To 5

4. (GAS) CHECK (F962) IGNITION SWITCH OUTPUT (START) CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Measure the resistance between ground and the (F962) Ignition Switch Output (Start) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (F962) Ignition Switch Output (Start) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST Body Verification Test

No

- Replace the PCM.
- Perform PCM VERIFICATION TEST PCM Verification Test.

5. (DIESEL) CHECK (F962) IGNITION SWITCH OUTPUT (START) CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the ECM C1 harness connector.
3. Measure the resistance between ground and the (F962) Ignition Switch Output (Start) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (F962) Ignition Switch Output (Start) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Replace the ECM.
- Perform ECM VERIFICATION TEST.