Diagnostic Instructions
DTC Descriptors
DTC B3604 01: Adjustable Foot Pedal Forward Switch Circuit Short to Battery
DTC B3605 01: Adjustable Foot Pedal Rearward Switch Circuit Short to Battery
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Switch Reference Voltage
| 1
| 1
| --
| --
|
Forward Switch Signal
| 2
| 2
| B3604 01
| --
|
Rearward Switch Signal
| 3
| 3
| B3605 01
| --
|
1. Adjustable Pedals Inoperative
2. Adjustable Pedals Forward Inoperative
3. Adjustable Pedals Rearward Inoperative
|
Circuit/System Description
The adjustable pedals forward and rearward switches are inputs to the memory seat module (MSM). The MSM supplies the switch assembly with a battery positive reference voltage. When the switch is operated to the forward or rearward direction, battery positive
voltage is applied to the forward or rearward switch signal inputs.
Conditions for Running the DTC
System voltage is 9-16 volts.
Conditions for Setting the DTC
The forward and rearward switch signal circuits are active at the same time.
Action Taken When the DTC Sets
The adjustable pedals will be disabled.
Conditions for Clearing the DTC
• | The DTC becomes history when the conditions for setting the DTC are no longer present. |
• | The history DTC clears after 100 malfunction-free ignition cycles. |
Reference Information
Schematic Reference
Adjustable Pedal Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Adjustable Pedals Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Pedal Forward Switch and Pedal Aft Switch parameters while cycling the adjustable pedal switch between the FWD and RWD position. The appropriate parameter should change between Active and Inactive as commanded.
Circuit/System Testing
- Disconnect the harness connector at the adjustable pedal switch.
- Ignition ON, test for 11.8-12.2 volts between the appropriate 12-volt reference circuit listed below and ground:
⇒ | If greater than the specified range, test the 12-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
- Verify the scan tool Pedal Forward Switch parameter is Inactive.
⇒ | If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM. |
- Verify the scan tool Pedal Aft Switch parameter is Inactive.
⇒ | If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM. |
- Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Forward Switch parameter should be Active.
⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
- Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Aft Switch parameter should be Active.
⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
- If all circuits test normal, test or replace the adjustable pedal switch.
Component Testing
X88/Z88
- Ignition OFF, disconnect the harness connector at the adjustable pedal switch.
- Test for infinite resistance between the 12-volt reference terminal 11 and the signal terminals listed below:
⇒ | If not the specified value, replace the adjustable pedal switch. |
- Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12-volt reference terminal 11 and the signal terminal 12.
⇒ | If greater than the specified range, replace the adjustable pedal switch. |
- Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12-volt reference terminal 11 and the signal terminal 10.
⇒ | If greater than the specified range, replace the adjustable pedal switch. |
Z75
- Ignition OFF, disconnect the harness connector at the adjustable pedal switch.
- Test for infinite resistance between the 12-volt reference terminal 5 and the signal terminals listed below:
⇒ | If not the specified value, replace the adjustable pedal switch. |
- Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12-volt reference terminal 5 and the signal terminal 6.
⇒ | If greater than the specified range, replace the adjustable pedal switch. |
- Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12-volt reference terminal 5 and the signal terminal 4.
⇒ | If greater than the specified range, replace the adjustable pedal switch. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.