B3604
DTC B3604 or B3605
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
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/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 V.
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 Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation
Adjustable Pedals Description and Operation (with Memory) Adjustable Pedals (with Memory)Adjustable Pedals Description and Operation (w/o Memory) Adjustable Pedals (w/o Memory)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References 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
1. Disconnect the harness connector at the adjustable pedal switch.
2. Ignition ON, test for B+ between the appropriate B+ reference circuit listed below and ground:
* X88/Z88 - terminal 11
* Z75 - terminal 5
• If greater than the specified range, test the B+ reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
• If less than the specified range, test the B+ reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
3. 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.
* X88/Z88 - terminal 12
* Z75 - terminal 6
4. 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.
* X88/Z88 - terminal 10
* Z75 - terminal 4
5. Install a 3 A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Forward Switch parameter should be Active.
* X88/Z88 - terminal 12
* Z75 - terminal 6
• 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.
6. Install a 3 A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Aft Switch parameter should be Active.
* X88/Z88 - terminal 10
* Z75 - terminal 4
• 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.
7. If all circuits test normal, test or replace the adjustable pedal switch.
Component Testing
X88/Z88
1. Ignition OFF, disconnect the harness connector at the adjustable pedal switch.
2. Test for infinite resistance between the B+ reference terminal 11 and the signal terminals listed below:
* Terminal 10
* Terminal 12
• If not the specified value, replace the adjustable pedal switch.
3. Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12 V reference terminal 11 and the signal terminal 12.
• If greater than the specified range, replace the adjustable pedal switch.
4. Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12 V reference terminal 11 and the signal terminal 10.
• If greater than the specified range, replace the adjustable pedal switch.
Z75
1. Ignition OFF, disconnect the harness connector at the adjustable pedal switch.
2. Test for infinite resistance between the B+ reference terminal 5 and the signal terminals listed below:
* Terminal 4
* Terminal 6
• If not the specified value, replace the adjustable pedal switch.
3. Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12 V reference terminal 5 and the signal terminal 6.
• If greater than the specified range, replace the adjustable pedal switch.
4. Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12 V 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 Verification Tests after completing the diagnostic procedure.
* Accessory Switch Replacement (without RPO SLT) Accessory Switch Replacement (without RPO SLT)Accessory Switch Replacement (with RPO SLT) Accessory Switch Replacement (with RPO SLT)
* Control Module References Control Module References for the MSM replacement, programming and setup